阅读说明：本技术 一种具有静电吸附pm2.5颗粒功能的导电包覆线、导电编织面料、滤网以及遮阳系统 (Conductive covered wire with function of electrostatically adsorbing PM2.5 particles, conductive woven fabric, filter screen and sun-shading system ) 是由 熊圣东 于 2021-08-06 设计创作，主要内容包括：本发明涉及一种具有静电吸附PM2.5颗粒功能的导电包覆线、导电编织面料、滤网以遮阳系统。所述导电包覆线从里到外依次包括纤维层、导电聚氯乙烯层以及静电吸尘剂层,静电吸尘剂层由静电吸尘剂溶液涂覆到导电聚氯乙烯层表面加热固化而成,静电吸尘剂溶液按重量份数计包括如下组分：静电吸尘剂8～12份、氯乙烯-醋酸乙烯共聚树脂10～15份、分散剂0.1～0.2份、醋酸丁酯50-70份。所述导电包覆线可制成导电编织面料,并应用在滤网、遮阳系统中。(The invention relates to a shading system comprising a conductive coating wire, a conductive woven fabric, a filter screen and a shading system, wherein the conductive coating wire has the function of electrostatically adsorbing PM2.5 particles. The conductive coating line sequentially comprises a fiber layer, a conductive polyvinyl chloride layer and an electrostatic dust collector layer from inside to outside, the electrostatic dust collector layer is formed by coating an electrostatic dust collector solution on the surface of the conductive polyvinyl chloride layer and heating and curing the electrostatic dust collector solution, and the electrostatic dust collector solution comprises the following components in parts by weight: 8-12 parts of electrostatic dust collector, 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 0.1-0.2 part of dispersant and 50-70 parts of butyl acetate. The conductive coating wire can be made into conductive woven fabric and applied to filter screens and sun shading systems.)

1. The utility model provides a conductive coating line with static adsorbs PM2.5 granule function, a serial communication port, conductive coating line includes fibrous layer, electrically conductive polyvinyl chloride layer and electrostatic precipitator layer from inside to outside in proper order, the electrostatic precipitator layer is formed by the heating solidification after electrostatic precipitator solution coating electrically conductive polyvinyl chloride layer, and electrostatic precipitator solution includes following component according to the part by weight: 8-12 parts of electrostatic dust collector, 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 0.1-0.2 part of dispersant and 50-70 parts of butyl acetate.

2. The conductive covered wire according to claim 1, wherein the diameter of the conductive covered wire is 0.20mm to 0.35 mm.

3. The conductive covered wire according to claim 1, wherein the fiber is one or more of polyester fiber, glass fiber, acrylic fiber, polypropylene fiber, aramid fiber, spandex fiber and polyethylene fiber, the fiber specification is 100-300D long fiber, and the monofilament breaking strength is greater than 10N.

4. The conductive covered wire according to claim 1, wherein the electrostatic dust collector is a mixture of calcium sulfide, ferroferric oxide, zinc stannate, and magnesium hydroxide.

5. The conductive covered wire according to claim 4, wherein the calcium sulfide, the ferroferric oxide, the zinc stannate and the magnesium hydroxide in the electrostatic dust collector respectively account for 15-30%, 15-30% and 15-30% of the total mass of the mixture in percentage by mass.

6. An electrically conductive knitted fabric having a function of electrostatically adsorbing PM2.5 particles, wherein the electrically conductive knitted fabric is formed by knitting the electrically conductive covered wire according to claim 1.

7. The conductive woven fabric of claim 6, wherein the conductive woven fabric has a warp and a weft structure, and rectangular or square voids are left between the warp structure and the weft structure, and the open area ratio is 10% to 15%.

8. The filter screen with the function of electrostatically adsorbing PM2.5 particles is characterized in that the filter screen is made of 7 conductive woven fabrics.

9. A sun shading system having a function of electrostatically adsorbing PM2.5 particles, characterized in that it comprises the filter net of claim 8.

10. The shading system of claim 9, comprising a left screen, a right screen, and a dc power source, wherein the left screen and the right screen are connected to the positive pole and the negative pole of the dc power source respectively through wires.

Technical Field

The invention belongs to the technical field of high polymer materials and daily necessities, and relates to a conductive coating wire, a conductive woven fabric, a filter screen and a sun-shading system with a function of electrostatically adsorbing PM2.5 particles.

Background

The particles are divided into total suspended particles (0-100 μm) and inhalable particles (0-19 μm) according to their aerodynamic diameters and their deposition positions in the respiratory system of a human body. PM2.5 is a general term of particles with aerodynamic equivalent diameter less than or equal to 2.5 microns, is inhalable particles, can be retained in the atmosphere for a long time, has long conveying distance, small particle size and large specific surface area, and is very easy to enrich toxic substances in the air, such as various acidic oxides, toxic heavy metals, bacteria, moulds, germs, Volatile Organic Compounds (VOC), polycyclic aromatic hydrocarbon (PHA) and the like. And because the aerodynamic diameter is less than or equal to 2.5 mu m, the medicine can not only enter the nasal cavity and the throat, but also enter the alveolar deposition or the blood circulation of a human body, and various diseases are caused.

The hazard of PM2.5 is manifold, multi-domain and cannot be neglected. PM2.5 is now a hotspot in the research of inhalable particulate matter, and as early as 1997, the us national environmental protection agency EPA has recognized the hazard of PM2.5 and promulgated the air quality standard for PM 2.5.

With the writing of PM2.5 into the national standard in 2012 of China, a plurality of regulations are issued to treat air pollution. People also gradually know about the PM2.5, and the PM2.5 in the residential environment becomes a topic which is more concerned by residents.

The window is the main passage for outside air and dust particles to enter the room. In the air quality relatively poor, under the condition that weather such as dust haze, haze did not obviously improve, if can reduce or block that those dust particles harmful to the human body get into in sunshade window system, will be indoor people and keep away from PM 2.5's the most direct effectual measure. The sunshade system which can ensure sunshade, ventilation and air permeability and can block and adsorb PM2.5 particles is an important direction for the development of future sunshade windows. At present, the traditional sunshade window system mainly focuses on wind resistance, sunshade, appearance, heat insulation and the like of the sunshade window, and few reports are made on the sunshade system with the electrostatic adsorption PM2.5 particles.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a conductive coating wire with a function of electrostatically adsorbing PM2.5 particles, and a conductive woven fabric woven by the conductive coating wire not only has the performances of shading, ventilating and the like, but also has the characteristic of adsorbing the particles of PM2.5 and the like.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a conductive coating line with static adsorption PM2.5 granule function, conductive coating line includes fibrous layer, electrically conductive polyvinyl chloride layer and static dust catcher layer from inside to outside in proper order, the static dust catcher layer is formed by heating solidification after static dust catcher solution coats electrically conductive polyvinyl chloride layer surface, and according to parts by weight, static dust catcher solution includes following component: 8-12 parts of electrostatic dust collector, 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 0.1-0.2 part of dispersant and 50-70 parts of butyl acetate.

In the conductive coated wire, the diameter of the conductive coated wire is 0.20mm to 0.35 mm.

In the conductive covered wire, the fiber is one or more of polyester fiber, glass fiber, acrylic fiber, polypropylene fiber, aramid fiber, spandex fiber and polyethylene fiber, the fiber specification is 100-300D long fiber, and the single-wire breaking strength is greater than 10N.

In the conductive coating wire, the electrostatic dust collector is a mixture of calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide.

Preferably, the calcium sulfide, the ferroferric oxide, the zinc stannate and the magnesium hydroxide respectively account for 15-30%, 15-30% and 15-30% of the total mass of the mixture according to mass percentage. When the quality of calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide is the same, the effect is best. Therefore, it is still more preferable that the mass ratios of calcium sulfide, ferroferric oxide, zinc stannate, and magnesium hydroxide in the electrostatic dust collector are all 25%.

The inorganic electrostatic dust collector used in the invention has poor compatibility with a high polymer resin material, and is difficult to have good compatibility with a conductive polyvinyl chloride composite material layer in a cladding line. The invention introduces the vinyl chloride-vinyl acetate copolymer resin into the electrostatic dust collector solution, has good compatible coupling effect with the electrostatic dust collector (calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide) used by the invention, and simultaneously has good compatibility with the conductive polyvinyl chloride composite material layer, so that the electrostatic dust collector coating can be better fused with the middle conductive polyvinyl chloride composite material layer into a whole, and the problems of poor compatibility of the electrostatic dust collector coating and the conductive coating line of the polymer resin substrate and gradual reduction of electrostatic efficacy along with time are solved, thereby leading the conductive coating line of the invention to have long-time electrostatic adsorption efficacy.

In the conductive coating wire, the dispersant can be one of BYK-110, BYK-111 and BYK-161. The dispersant can enable the electrostatic dust collector to be better and uniformly dispersed in the matrix resin, and is convenient for forming a uniform and smooth coating film on the surface of the coated wire.

In the conductive covered wire, the conductive polyvinyl chloride material comprises the following components in parts by weight: 70 parts of polyvinyl chloride (PVC), 25-35 parts of chlorinated polyethylene, 3-5 parts of a stabilizer, 25-35 parts of a plasticizer, 5-8 parts of a flame retardant, 6-10 parts of a conductive filler, 10-15 parts of a modified resin, 0.2-0.4 part of a lubricant and 0.6-1 part of other additives.

Preferably, the conductive filler is silver-plated nano graphite micro-sheets, nickel-coated copper powder and single-arm carbon nano tubes, and the mass ratio of the silver-plated nano graphite micro-sheets to the nickel-coated copper powder is 1 (0.2-0.6): (0.05-0.1) mixing the above components. Preferably, the conductive filler is silver-plated nano graphite micro-sheets, nickel-coated copper powder and single-arm carbon nanotubes in a mass ratio of 1 (0.2-0.4): (0.05-0.08) mixing the above components. More preferably, the mass ratio of the silver-plated nano graphite micro-sheets to the nickel-coated copper powder to the single-arm carbon nano tubes in the conductive filler is 1: 0.3: 0.07. the conductive polyvinyl chloride material adopts silver-plated nano graphite micro-sheets as main conductive filler, the specific gravity of graphite is small, less additive amount can be used under the same volume, and the chemical stability of the conductive polyvinyl chloride material is higher; the nickel-coated copper powder has good conductive property and excellent electromagnetic shielding property, and has good conductive property when matched with the silver-plated nano graphite micro-sheet. The single-arm carbon nano tube is complementary to the conductivity of the silver-plated nano graphite microchip, and has ultrahigh conductivity and good mechanical and mechanical properties. When the composite material is formed, the silver-plated nano graphite micro-sheets, the nickel-coated copper powder and the single-arm carbon nano-tubes are different from the matrix resin in crystal structure, so that the silver-plated nano graphite micro-sheets, the nickel-coated copper powder and the single-arm carbon nano-tubes as conductive particles can only stay and be embedded on the relatively loose crystal boundary of the matrix. When the conductive particles embedded on the grain boundary are mutually contacted or the gaps are small, the potential barrier of the conductive filler particles is continuously reduced to form an electric percolation network, and a part of conductive channels with strong conductivity can be formed in a high-resistance phase, so that the conductive function is realized. The silver-plated nano graphite micro-sheet serving as the main conductive particle is microscopically a nano-scale sheet structure, and the structure is favorable for forming a conductive path in a polymer, so that the conductive percolation threshold of a composite material system can be greatly reduced, and the characteristics of low conductive filler addition and high conductivity can be realized. The silver-plated nano graphite micro-sheet is used as main conductive particles, ohmic contact is formed between different conductive particles, no potential barrier exists on a contact surface, and resistance of electrons in a migration process is reduced, so that the migration rate of the electrons in the composite material is improved, and the conductivity of the composite material is improved. However, when the weight of the conductive filler in the PVC composite material of the invention reaches about 10 parts, the conductivity of the composite material reaches a certain value and does not change obviously with the increase of the amount of the conductive filler, so that the amount of the conductive filler is controlled to be 6-10 parts. The addition of the silver-plated nano graphite microchip and the single-arm carbon nano tube can not only improve the conductivity of the composite material, but also play a role in reinforcement, so that the mechanical property of the composite material is improved.

Preferably, the mass content of nickel in the nickel-coated copper powder is 10-35%. More preferably, the mass content of nickel in the nickel-coated copper powder is 15-30%.

The modified resin can be one or more of ethylene-vinyl acetate copolymer resin and vinyl chloride-vinyl acetate copolymer resin. When the modified resin is a mixture of ethylene-vinyl acetate copolymer resin and vinyl chloride-vinyl acetate copolymer resin, the mass ratio of the ethylene-vinyl acetate copolymer resin to the vinyl chloride-vinyl acetate copolymer resin is 1: (0.5 to 1.6). The ethylene-vinyl acetate copolymer resin is formed by copolymerizing ethylene and vinyl acetate; the vinyl chloride-vinyl acetate copolymer resin is a polymer prepared by copolymerizing Vinyl Chloride (VC) and Vinyl Acetate (VAC) monomers. The two copolymer resins have polar and nonpolar groups and are well compatible with the polyvinyl chloride resin, and the vinyl acetate polar groups contained in the copolymer resins can have chemical coupling effect with the conductive filler, antimony trioxide and other inorganic additives, so that the copolymer resins play a role in compatibilizing the matrix PVC resin and various inorganic additives, can improve the flexibility, toughness and processing flow property of the composite material, and enable the composite material system to be more uniform and reasonable. In addition, vinyl acetate groups in the ethylene-vinyl acetate copolymer resin and the vinyl chloride-vinyl acetate copolymer have good self-adhesive property, so that the polyvinyl chloride composite material has good thermal bonding property, and the smoothness and firmness of the structure can be improved by heat setting treatment after the polyvinyl chloride composite material is prepared into a covering thread woven fabric.

Preferably, the modified resin is a mixture of ethylene-vinyl acetate copolymer resin and vinyl chloride-vinyl acetate copolymer resin mixed according to the mass ratio of 1: 1.

The stabilizer can be any heat stabilizer for polyvinyl chloride, such as a calcium-zinc composite stabilizer.

The plasticizer can be any one or more of dioctyl terephthalate, diisooctyl adipate, dioctyl sebacate, tri-n-butyl citrate, acetyl tributyl citrate, triethyl citrate, epoxy butyl stearate and trioctyl trimellitate. A certain amount of plasticizer is added into the conductive polyvinyl chloride material, molecules of the plasticizer can be inserted between PVC molecular chains, mobility of the PVC molecular chains is increased, and crystallinity of the PVC molecular chains is reduced, so that plasticity and flexibility of PVC are increased. The plasticizer is used together with chlorinated high-density polyethylene, so that the flow processing performance of PVC can be obviously improved, and a coating layer can be uniformly formed on the surface of a single fiber bundle by heating, melting and plasticizing.

The flame retardant is antimony trioxide. Antimony trioxide itself has no flame retardant effect, but shows a synergistic effect in the presence of halides. Chlorine elements in the polyvinyl chloride resin and chlorinated high-density polyethylene resin can react to generate high-concentration hydrochloric acid or free chlorine, the hydrochloric acid and the free chlorine can react with antimony trioxide to generate antimony trichloride or antimony pentachloride antimony chloride, the antimony compounds can reduce the contact of combustible substances and oxygen to generate a carbon covering layer, and free radicals in the combustion process can be captured in a gaseous state, so that the aim of high flame retardance by low addition of a flame retardant is fulfilled, and the finally woven fabric is endowed with good flame retardant property and mechanical property.

The lubricant can be any lubricant, such as ethylene bis stearamide or oxidized polyethylene wax.

The invention also provides a preparation method of the conductive covered wire with the function of electrostatically adsorbing PM2.5 particles, which comprises the following steps: weighing 8-12 parts of electrostatic dust collector, 10-15 parts of vinyl chloride-vinyl acetate copolymer resin, 0.1-0.2 part of dispersing agent and 50-70 parts of butyl acetate, adding into a stirring device, and stirring at normal temperature for 1.5-2 hours to prepare the electrostatic dust collector solution. And coating a conductive polyvinyl chloride material on the surface of the fiber, coating an electrostatic dust collector solution on the conductive polyvinyl chloride layer, and heating and curing to obtain the conductive coated wire.

The invention also provides a conductive woven fabric with the function of electrostatically adsorbing PM2.5 particles, which is formed by weaving the conductive covered wire. The conductive woven fabric is provided with a warp structure and a weft structure, rectangular or square gaps are reserved between the warp structure and the weft structure, and the aperture ratio of the conductive woven fabric is 10% -15%.

According to the invention, the aperture ratio is set within the range, the gaps not only enable the fabric to have good air permeability, but also enable the fabric to have certain light transmittance, a part of light can pass through the fine holes in the composite material, and the light transmittance can be controlled by adjusting the size of the gaps of the material, so that the controllability of sun shading is realized.

The invention also provides a preparation method of the conductive woven fabric, which comprises the steps of weaving the conductive coated wires firstly, and then putting the conductive coated wires into a hot drying room under the condition of tension for heat setting treatment to obtain the conductive woven fabric with warp and weft.

Preferably, in the heat setting treatment, the temperature of the heat drying room is 90-135 ℃, the heat setting time is 4-8 min, the warp tension is 500-1300N, and the weft tension is 400-900N. After the heat setting treatment, the crossing parts of the cladding wires are lightly bonded, so that the conductive cladding wires can be prevented from shifting, the cladding wires can be firmly combined, and the fabric is prevented from deforming.

The invention also provides a filter screen with the function of electrostatically adsorbing PM2.5 particles, and the filter screen is made of the conductive woven fabric with the function of electrostatically adsorbing PM2.5 particles.

The invention also provides a sun-shading system with the function of electrostatically adsorbing PM2.5 particles, which comprises the filter screen with the function of electrostatically adsorbing PM2.5 particles.

Preferably, the sun-shading system comprises a left filter screen, a right filter screen and a direct current power supply, wherein the left filter screen and the right filter screen are respectively connected with the anode and the cathode of the direct current power supply through leads.

Further preferably, the dc power supply supplies a voltage of 50V to 220V when operating.

Further preferably, the left side of left side filter screen and the right side of right filter screen are equipped with automatic winding device respectively.

Still further preferably, the automatic winding device comprises a roller shutter pipe, a cloth outlet is arranged on the roller shutter pipe, a cloth winding shaft is arranged inside the roller shutter pipe, and the left end part of the left filter screen and the right end part of the right filter screen are respectively connected to the cloth winding shaft.

Still further preferably, a stepping motor is further arranged on the roller shutter tube, and the stepping motor is connected with the cloth rolling shaft.

Still further preferably, the right side end of the left filter screen and the left side end of the right filter screen are respectively provided with a strip-shaped insulating sheet, and the upper and lower ends of the left filter screen and the right filter screen are respectively provided with a guide rail.

The left filter screen, the right filter screen and the direct-current power supply form an electrostatic adsorption system, the left filter screen and the right filter screen form two electrostatic adsorption electrodes, and the left filter screen and the right filter screen are respectively positively charged and negatively charged in a working state after being electrified. When objects without static electricity (PM2.5 and other uncharged fine particles) are close to the woven fabric filter screen with static electricity, due to electrostatic induction, charges with the opposite polarity to the charges carried by the charged objects are gathered on one side of the object without static electricity close to the object with static electricity (the same number of charges with the same polarity are generated on the other side), and due to mutual attraction of charges with opposite polarities, an electrostatic adsorption phenomenon is shown, and the PM2.5 and other uncharged fine particles are adsorbed on the filter screen due to electrostatic induction, so that the PM2.5 and other uncharged fine particles cannot enter a room.

The sun-shading system can be automatically unfolded and wound by the stepping motors in the left automatic winding device and the right automatic winding device through the pair of guide rails arranged on the left filter screen and the right filter screen. When the switching power supply of the motor is turned on, the left filter screen and the right filter screen can be automatically unfolded along the guide rail, and the stepping motor can be automatically turned off when the two insulation sheets are in contact.

The shading system of the invention can be used as a common curtain for shading and ventilating at the same time.

Compared with the prior art, the invention has the following beneficial effects:

1. the conductive coating line has the advantages that the middle layer is the conductive flame-retardant polyvinyl chloride composite material layer, and the conductive woven fabric prepared from the coating line is provided with the conductive flame-retardant polyvinyl chloride composite material layer, so that the woven fabric is excellent in mechanical property, good in conductive and flame-retardant characteristics, convenient to clean, excellent in weather resistance and very long in service life. In addition, the surface of the conductive coating line contains an electrostatic dust collector coating, and the dust collector can effectively adsorb PM2.5 dust micro-particles in the air by utilizing the electrostatic principle.

2. The vinyl chloride-vinyl acetate copolymer resin is introduced into the electrostatic dust collector solution on the surface of the coating line, has good compatible coupling effect with calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide in the electrostatic dust collector used in the invention, and has good compatibility with PVC, so that the electrostatic dust collector coating can be better fused with the conductive flame-retardant polyvinyl chloride composite material layer into a whole, and the problems that the electrostatic dust collector coating has poor compatibility with the conductive coating line of the conductive flame-retardant polyvinyl chloride composite material base material and the electrostatic effect is gradually weakened along with time are solved, thereby the woven fabric has long-time electrostatic adsorption effect.

3. The knitted fabric is made of the conductive covered wires with the electrostatic dust collector coating on the surface, and the electrostatic adsorption effect of the electrostatic dust collector coating enables the knitted fabric to have a certain adsorption effect even under the condition that the knitted fabric is not electrified, so that a certain amount of PM2.5 particles can be adsorbed.

4. The shading system disclosed by the invention has the advantages that the conductive woven fabric is used for manufacturing the filter screen, and after the filter screen is connected with a direct-current power supply, the woven fabric has a better electrostatic adsorption function, PM2.5 particles and other dust around the filter screen can be effectively adsorbed, outdoor dust is prevented from entering a room, the amount of the indoor dust is reduced under the condition of ensuring light transmission and perspective, and the indoor air quality is improved.

Drawings

FIG. 1 is a schematic view of the sunshade system of the present invention.

In fig. 1: 1. a left filter screen; 2. a roller blind tube; 3. a stepping motor; 4. a cloth outlet; 5. a guide rail; 6. a direct current power supply; 7. strip insulating piece.

Detailed Description

The following are specific embodiments of the present invention, and the technical solutions of the present invention are further described with reference to the drawings of the specification, but the present invention is not limited to these embodiments.

Example 1

The conductive coated wire has the function of electrostatically adsorbing PM2.5 particles.

Preparing a conductive polyvinyl chloride composite material: weighing 70 parts of polyvinyl chloride resin, 30 parts of chlorinated polyethylene, 4 parts of calcium-zinc composite stabilizer, 30 parts of dioctyl terephthalate, 6 parts of flame retardant antimony trioxide, 0.3 part of ethylene bis stearamide, 0.4 part of antioxidant pentaerythrityl tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and 0.4 part of anti-ultraviolet agent 2-hydroxy-4-n-octyloxy benzophenone in parts by weight, adding the components into a high-speed mixer for mixing, and adding 10 parts of the components in parts by weight at a mass ratio of 1: 0.3: 0.07 part of silver-plated nano graphite microchip, nickel-coated copper powder (the mass content of nickel is 30 percent) and conductive filler of a single-arm carbon nano tube, then 13 parts of a mixture of ethylene-vinyl acetate copolymer resin and vinyl chloride-vinyl acetate copolymer resin in equal proportion are added, the materials are continuously mixed for 3 minutes in a high-speed mixer, then the mixed materials are added into a cold mixer to be cooled to 45 ℃ for discharging, the discharged materials are cooled to room temperature, then the discharged materials are added into a double-screw extruder to be melted, extruded and granulated, and conductive polyvinyl chloride composite material granules are obtained after granulation.

Preparing an electrostatic dust collector solution: weighing 2.5 parts of calcium sulfide, 2.5 parts of ferroferric oxide, 2.5 parts of zinc stannate, 2.5 parts of magnesium hydroxide, 12 parts of vinyl chloride-vinyl acetate copolymer resin, 0.15 part of dispersant BYK-110 and 60 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution.

Preparing a conductive coating wire: the method comprises the steps of melting and coating a conductive polyvinyl chloride material on the surface of a polyester fiber with the specification of 220D and the monofilament breaking strength of 20 +/-2N, coating an electrostatic dust collector solution on a conductive polyvinyl chloride layer, and heating and curing to obtain a conductive coating line which sequentially comprises the polyester fiber layer, the conductive polyvinyl chloride layer and the electrostatic dust collector layer from inside to outside and has the diameter of 0.30mm, wherein the conductive coating line has the function of electrostatically adsorbing PM2.5 particles.

Example 2

The example differs from example 1 only in that 8 parts by weight of a mixture of 1: 0.3: 0.07 silver-plated nano graphite microchip, nickel-coated copper powder (the mass content of nickel is 30 percent), and conductive filler of a single-arm carbon nano tube; the diameter of the prepared conductive coated wire is 0.28 mm. The rest is the same as in example 1.

Example 3

This example differs from example 1 only in that an electrostatic cleaner solution was prepared as follows: weighing 3 parts of calcium sulfide, 3 parts of ferroferric oxide, 3 parts of zinc stannate, 3 parts of magnesium hydroxide, 12 parts of vinyl chloride-vinyl acetate copolymer resin, 0.15 part of dispersant BYK-110 and 65 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution. The rest is the same as in example 1.

Example 4

This example is different from example 1 only in that 10 parts by weight of a mixture of an ethylene-vinyl acetate copolymer resin and a vinyl chloride-vinyl acetate copolymer resin in an equal ratio was added. The rest is the same as in example 1.

Example 5

The conductive coated wire has the function of electrostatically adsorbing PM2.5 particles.

Preparing a conductive polyvinyl chloride composite material: weighing 70 parts of polyvinyl chloride resin, 30 parts of chlorinated polyethylene, 4 parts of calcium-zinc composite stabilizer, 30 parts of dioctyl terephthalate, 6 parts of flame retardant antimony trioxide, 0.3 part of ethylene bis stearamide, 0.3 part of antioxidant tris (2, 4-di-tert-butylphenyl) phosphite and 0.3 part of ultraviolet resistant agent 2-hydroxy-4-methoxybenzophenone according to parts by weight, adding the components into a high-speed mixer for mixing, and adding 8 parts of the components in a mass ratio of 1: 0.4: 0.08 of silver-plated nano graphite microchip, nickel-coated copper powder (the mass content of nickel is 30 percent) and conductive filler of a single-arm carbon nano tube, then 13 parts of a mixture of ethylene-vinyl acetate copolymer resin and vinyl chloride-vinyl acetate copolymer resin in equal proportion are added, the materials are continuously mixed for 3 minutes in a high-speed mixer, then the mixed materials are added into a cold mixer to be cooled to 45 ℃ for discharging, the discharged materials are cooled to room temperature, then the discharged materials are added into a double-screw extruder to be melted, extruded and granulated, and conductive flame-retardant polyvinyl chloride composite material granules are obtained after granulation.

Preparing an electrostatic dust collector solution: weighing 2 parts of calcium sulfide, 3 parts of ferroferric oxide, 2.5 parts of zinc stannate, 2.5 parts of magnesium hydroxide, 13 parts of vinyl chloride-vinyl acetate copolymer resin, 0.15 part of dispersant BYK-110 and 65 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution.

Preparing a conductive coating wire: the method comprises the steps of melting and coating a conductive polyvinyl chloride material on the surface of a polyester fiber with the specification of 220D and the monofilament breaking strength of 20 +/-2N, coating an electrostatic dust collector solution on a conductive polyvinyl chloride layer, and heating and curing to obtain a conductive coating line which sequentially comprises the polyester fiber layer, the conductive polyvinyl chloride layer and the electrostatic dust collector layer from inside to outside and has the diameter of 0.30mm, wherein the conductive coating line has the function of electrostatically adsorbing PM2.5 particles.

Example 6

This example differs from example 1 only in that an electrostatic cleaner solution was prepared as follows: weighing 1.5 parts of calcium sulfide, 3 parts of ferroferric oxide, 3 parts of zinc stannate, 2.5 parts of magnesium hydroxide, 13 parts of vinyl chloride-vinyl acetate copolymer resin, 0.15 part of dispersant BYK-110 and 65 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution. The rest is the same as in example 1.

Example 7

This example differs from example 1 only in that an electrostatic cleaner solution was prepared as follows: weighing 1 part of calcium sulfide, 1 part of ferroferric oxide, 4 parts of zinc stannate, 4 parts of magnesium hydroxide, 13 parts of vinyl chloride-vinyl acetate copolymer resin, 0.15 part of dispersant BYK-110 and 65 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution. The rest is the same as in example 1.

Example 8

This example differs from example 1 only in that an electrostatic cleaner solution was prepared as follows: weighing 4 parts of calcium sulfide, 1 part of ferroferric oxide, 4 parts of zinc stannate, 1 part of magnesium hydroxide, 13 parts of vinyl chloride-vinyl acetate copolymer resin, 0.15 part of dispersant BYK-110 and 65 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution. The rest is the same as in example 1.

Example 9

This example differs from example 1 only in that the conductive filler in this example is an equal portion of conductive carbon black. The rest is the same as in example 1.

Example 10

This example differs from example 2 only in that the conductive filler in this example is a mixture of 4 parts conductive graphite, 2 parts copper powder, and 2 parts iron powder. The rest is the same as in example 2.

Example 11

The example differs from example 1 only in that in this example, 3 parts by weight of a mixture of 1: 0.3: 0.07 silver-plated nano graphite microchip, nickel-coated copper powder (the mass content of nickel is 30 percent), and conductive filler of a single-arm carbon nano tube. The rest is the same as in example 1.

Example 12

The difference between this example and example 1 is only that in this example, 8 parts by weight of a mixture of 3: 0.7 silver-plated nano graphite micro-sheet, nickel-coated copper powder (the mass content of nickel is 30 percent) and conductive filler of a single-arm carbon nano tube. The rest is the same as in example 1.

Comparative example 1

Preparing a conductive polyvinyl chloride material: the same as in example 1.

Preparing a conductive coating wire: and (3) melting and coating the conductive polyvinyl chloride material on the surface of the polyester fiber with the specification of 220D and the monofilament breaking strength of 20 +/-2N to prepare the coated wire with the diameter of 0.30 mm. I.e. there is no electrostatic cleaner layer in this comparative example.

Comparative example 2

The difference between this example and example 1 is only that in this comparative example, the electrostatic cleaner was weighed in the following parts by weight: 1 part of calcium sulfide, 1 part of ferroferric oxide, 1 part of zinc stannate and 1 part of magnesium hydroxide. The rest is the same as in example 1.

Comparative example 3

The difference between this example and example 1 is only that in this comparative example, the electrostatic cleaner was weighed in the following parts by weight: 4 parts of calcium sulfide, 4 parts of ferroferric oxide, 4 parts of zinc stannate and 4 parts of magnesium hydroxide. The rest is the same as in example 1.

Comparative example 4

The difference between this example and example 1 is that in this example, the electrostatic cleaner was weighed in the following parts by weight: 5 parts of ferroferric oxide and 5 parts of zinc stannate. The rest is the same as in example 1.

Comparative example 5

This comparative example is different from example 1 only in that in the comparative example, 5 parts by weight of a mixture of an ethylene-vinyl acetate copolymer resin and a vinyl chloride-vinyl acetate copolymer resin in equal proportions was added to prepare a conductive polyvinyl chloride composite; preparing an electrostatic dust collector solution: weighing 2.5 parts of calcium sulfide, 2.5 parts of ferroferric oxide, 2.5 parts of zinc stannate, 2.5 parts of magnesium hydroxide, 0.15 part of dispersant BYK-110 and 65 parts of butyl acetate according to parts by weight, adding into a stirring device, and stirring at normal temperature for 1.5 hours to prepare the electrostatic dust collector solution. The rest is the same as in example 1.

Comparative example 6

This comparative example differs from example 1 only in that it does not contain a conductive filler in the polyvinyl chloride composite, i.e., is a common non-conductive polyvinyl chloride material, and is otherwise the same as example 1.

Examples A1-A12

The conductive covering wires prepared in the embodiments 1 to 12 are respectively twisted and woven by a loom to form a woven fabric with regular grains and a warp and weft structure, and then the woven fabric is put into a hot drying room under the condition of tension to be subjected to heat setting treatment, so that the conductive woven fabric with the aperture ratio of 10% is prepared. The warp tension of the heat setting is 1200N, the weft tension is 700N, the temperature of the heat drying room is 125 ℃, and the time of the heat setting treatment is 6 min.

Comparative examples A1-A6

The conductive coated wires of comparative examples 1 to 6 were respectively made into conductive woven fabrics by the method of example a 1.

Examples B1-B12

As shown in fig. 1, the sunshade system with the function of electrostatically adsorbing PM2.5 particles according to the present invention comprises:

a direct-current power supply: the voltage of 100V is provided during operation;

left filter screen and right filter screen: the left filter screen and the right filter screen are respectively made of the conductive woven fabrics in the embodiment A1-A12, and are respectively connected with the positive pole and the negative pole of the direct-current high-voltage power supply 6 through leads;

the automatic winding device comprises two sets of automatic winding devices, wherein the two sets of automatic winding devices are respectively arranged on the left side of a left filter screen 1 and the right side of a right filter screen, each set of automatic winding device comprises a roller shutter pipe 2, a cloth outlet 4 is formed in the roller shutter pipe 2, a cloth winding shaft is arranged in the roller shutter pipe 2, the left end part of the left filter screen 1 and the right end part of the right filter screen are respectively connected to the cloth winding shafts of the corresponding automatic winding devices, and a stepping motor 3 connected with the cloth winding shafts is further arranged on the roller shutter pipe 2 and used for driving the cloth winding shafts to realize automatic winding and unwinding of the filter screens;

two insulated guide rails 5: are respectively arranged at the upper and lower end parts of the left filter screen 1 and the right filter screen; and two strip-shaped insulating sheets 7: are respectively arranged at the right end part of the left filter screen 1 and the left end part of the right filter screen, and have the width of 5cm and the thickness of 1 cm.

The preparation method of the sun-shading system with the function of electrostatically adsorbing PM2.5 particles comprises the following steps: the conductive woven fabric is cut into a left filter screen 1 and a right filter screen with proper sizes, the left filter screen 1 and the right filter screen are respectively connected with the positive pole and the negative pole of a high-voltage direct-current power supply 6, and then the left filter screen 1 and the right filter screen are respectively fixed on corresponding automatic winding devices.

Comparative examples B1-B6

The only difference from example B1 is that the left and right screens were made from the conductive knitted fabrics of comparative examples a1-a6, respectively, i.e., the left and right screens of comparative example B1 were made from the conductive knitted fabrics of comparative example a1 and the left and right screens of comparative example B2 were made from the conductive knitted fabrics of comparative example a 2.

The performances of the conductive coated wire, the conductive woven fabric and the sun-shading system with the function of electrostatically adsorbing PM2.5 particles, which are prepared in the embodiments 1 to 12, the comparative examples 1 to 6, the embodiments A1 to A12, the comparative examples A1 to A6, the embodiments B1 to B12 and the comparative examples B1 to B6 of the invention, are compared, and the comparison results are shown in Table 1.

Table 1:

note: oxygen index test standard: GB/T5454-1997; test standard of color fastness to sunlight: GB/T8427-2008; conductive coated wire resistance (per 20 cm): the resistance of the unwoven lead conductive clad wire; PM2.5 adsorption efficiency a: under the condition of no direct current power supply, the mass ratio of PM2.5 adsorbed by the woven fabric for half an hour to the woven fabric is equal to that of the woven fabric; PM2.5 adsorption efficiency b: and under the condition of a direct-current power supply, the mass ratio of PM2.5 adsorbed by the woven fabric in the sun-shading system for half an hour to the woven fabric is higher.

As can be seen from Table 1, the resistance of the conductive clad wires prepared in examples 1 to 12 of the present invention (per 20cm) was 10⁵Within omega, has conductive characteristics; the conductive knitted fabric has good weather resistance and flame retardant property, and has the function of adsorbing PM2.5 particles under the action of no direct-current power supply; under the condition that a direct current power supply is electrified, the PM2.5 particle adsorption function of the sun-shading system is more obvious.

As can be seen from the examples, as the content of the conductive filler playing a main conductive characteristic in the conductive polyvinyl chloride composite material is reduced, the resistance of the prepared conductive coated wire is greater, see examples 1 and 2 and example 11. If the polyvinyl chloride composite does not contain the conductive filler of the present invention, the resulting composite is not conductive, example 1 and comparative example 6

The conductive filler used in the invention is a mixture of silver-plated nano graphite micro-sheets, nickel-coated copper powder and single-arm carbon nano tubes, and if the conductive filler of the invention is replaced by equal parts of common conductive carbon black or a mixture of conductive graphite, copper powder and iron powder in the conductive polyvinyl chloride composite material, the conductivity of the obtained conductive material is obviously weakened, see examples 1 and 2 and examples 9 and 10.

Preferably, the conductive filler is silver-plated nano graphite micro-sheets, nickel-coated copper powder and single-arm carbon nano tubes, and the mass ratio of the silver-plated nano graphite micro-sheets to the nickel-coated copper powder is 1 (0.2-0.6): (0.05-0.1) mixing the above components. Preferably, the conductive filler is silver-plated nano graphite micro-sheets, nickel-coated copper powder and single-arm carbon nanotubes in a mass ratio of 1 (0.2-0.4): (0.05-0.08) mixing the above components. More preferably, the mass ratio of the silver-plated nano graphite micro-sheets to the nickel-coated copper powder to the single-arm carbon nano tubes in the conductive filler is 1: 0.3: 0.07. in a further preferable proportion and a further preferable proportion of the conductive fillerIn the method, the obtained polyvinyl chloride composite material has excellent conductivity (the resistance of the conductive coating wire is 10 per 20cm)³Omega. or less), see examples 1-8. If the proportion of the silver-plated nano graphite micro-sheets in the conductive filler is reduced, that is, the components in the conductive filler are not in the preferred proportion, the conductivity of the obtained polyvinyl chloride composite material is reduced, see examples 1 and 12.

After the surface of the coating wire of the woven fabric is coated with the electrostatic dust collector, the surface of the woven fabric has certain electrostatic property, and the woven fabric also has adsorption property on particles such as PM2.5 and the like under the condition of no direct-current power supply, as shown in examples A1-A12; and the adsorption capacity to PM2.5 is increased with the increase of the content of the electrostatic dust collector in the electrostatic dust collector solution within a certain adding amount range, see examples A1, A3 and comparative example A2; if the surface of the coated wire does not contain the electrostatic dust collector coating, the adsorption capacity of the fabric on PM2.5 is poor under the condition of no external direct current power supply, see example A1 and comparative example A1; if the content of the electrostatic dust collector in the electrostatic dust collector layer on the surface of the coated wire is too high, the electrostatic adsorption effect is lost, and the adsorption capacity of the woven fabric on PM2.5 is deteriorated under the condition of no external direct current power supply, as shown in example A1 and comparative example A3;

the electrostatic dust collector is a mixture of calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide, and is a complex integral body. Preferably, the calcium sulfide, the ferroferric oxide, the zinc stannate and the magnesium hydroxide respectively account for 15-30%, 15-30% and 15-30% of the total mass of the mixture according to mass percentage. Within the preferable proportion range, the obtained woven fabric has better adsorption capacity to PM2.5 under the condition of no external direct current power supply, see examples A5 and A6. Still more preferably, the mass ratio of calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide in the electrostatic dust collector is 25%, and under the condition of the mixture ratio, the obtained knitted fabric has the best adsorption capacity on PM2.5 under the condition of no external direct current power supply, as shown in examples A1, A2, A3 and A4. If the components in the electrostatic dust collector are not in the preferable ranges, the adsorption capacity of the obtained woven fabric on PM2.5 is reduced under the condition of no external direct current power supply, and the woven fabric is shown in examples A1-A6 and examples A7 and A8. If the electrostatic dust collector is not a mixture of calcium sulfide, ferroferric oxide, zinc stannate and magnesium hydroxide, the adsorption capacity of the obtained woven fabric on PM2.5 is poor under the condition of no external direct current power supply, and the compound of the electrostatic dust collector has a compounding synergistic effect as shown in examples A1-A6 and a comparative example A4.

Because the conductive polyvinyl chloride composite material adopts the synergistic flame retardant and free radical flame retardant mechanisms, the composite material has good flame retardant property, and the corresponding conductive woven fabric also has good flame retardant property. If the antimony trioxide in the composite system is not uniformly dispersed or the polyvinyl chloride composite does not contain antimony trioxide, the flame retardancy of the conductive knitted fabric is reduced, see example A1 and comparative examples A5, A6

In the electrostatic dust collector solution, the vinyl chloride-vinyl acetate copolymer resin plays a role in coupling and compatibilizing the electrostatic dust collector and the PVC composite material, if the vinyl chloride-vinyl acetate copolymer resin is not contained in the preparation process of the electrostatic dust collector solution, the electrostatic dust collector is difficult to be compatibly combined with a polyvinyl chloride composite material layer, finally, the electrostatic adsorption capacity of the woven fabric is obviously weakened under the condition of no external direct current power supply, and the capacity of adsorbing PM2.5 is correspondingly weakened, which is shown in an example A1 and a comparative example A5.

In the conductive polyvinyl chloride composite material, the ethylene-vinyl acetate copolymer resin and the vinyl chloride-vinyl acetate copolymer resin with coupling and dispersing functions play an active role in the dispersion uniformity between the inorganic metal filler and the polyvinyl chloride resin in a conductive composite material system, so that the functions of conductivity and flame retardance can be fully exerted. If the content of the inorganic metal filler and the PVC is reduced in the formula, the dispersion uniformity of the inorganic metal filler in PVC is poor, the characteristics of each functional material cannot be fully exerted, and correspondingly, the resistance of the material is increased, and the flame retardant property is weakened, which is shown in examples 1 and 4 and comparative example 5, and examples A1, A4 and comparative example A5.

In a sun-shading system powered by a direct-current power supply, the positive charges and the negative charges on the left and right woven fabrics are greatly increased by electrifying the direct-current power supply, and a large amount of PM2.5 and other fine particles can be adsorbed due to electrostatic adsorption, as shown in embodiments B1-B6. If the conductivity of the covering wire in the woven fabric is poor, the adsorption property of the sun-shading system to PM2.5 is reduced, see examples B9 to B12 and comparative examples B5 and B6. In addition, if the amount or the proportion of the electrostatic dust collector on the surface of the covered wire is not in the preferable range, the adsorption capacity of the woven fabric prepared by the covered wire and the sun-shading system thereof on PM2.5 is weakened, and the woven fabric and the sun-shading system thereof are shown in examples B7 and B8 and comparative examples B1-B4.

The technical scope of the invention claimed by the embodiments of the present application is not exhaustive, and new technical solutions formed by equivalent replacement of single or multiple technical features in the technical solutions of the embodiments are also within the scope of the invention claimed by the present application; in all the embodiments of the present invention, which are listed or not listed, each parameter in the same embodiment only represents an example (i.e., a feasible embodiment) of the technical solution, and there is no strict matching and limiting relationship between the parameters, wherein the parameters may be replaced with each other without departing from the axiom and the requirements of the present invention, unless otherwise specified.

The technical means disclosed by the scheme of the invention are not limited to the technical means disclosed by the technical means, and the technical scheme also comprises the technical scheme formed by any combination of the technical characteristics. While the foregoing is directed to embodiments of the present invention, it will be appreciated by those skilled in the art that various changes may be made in the embodiments without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.