阅读说明：本技术 一种抗静电防挥发渗漏型托盘及其制备方法 (Antistatic and anti-volatilization leakage type tray and preparation method thereof ) 是由 庄宏楠 陈东 徐俊强 于 2020-12-07 设计创作，主要内容包括：本申请涉及抗静电塑料领域,具体公开了一种抗静电防挥发渗漏型托盘及其制备方法,所述抗静电防挥发渗漏型托盘包括：托盘本体,所述托盘本体内设有一端开口的容纳腔；多个支撑件,每个所述支撑件形成为朝向容纳腔开口方向延伸的杆型件,每个所述支撑件间隔开设于所述容纳腔中；多个隔板,每个所述隔板均设于所述容纳腔,每个所述隔板的两端与所述容纳腔内壁固定相连；支撑板,所述支撑板形成为板型件且沿其厚度方向设置有多个贯通的第一通孔,所述支撑板设于所述安装腔的开口端。本申请通过在托盘的内部设置支撑板和支撑件,当出现物料渗漏或者溢出时,对溢出的材料进行收集,有效防止物料的泄露后出现化学制品的挥发。(The application relates to the field of antistatic plastics, and specifically discloses antistatic anti-volatilization leakage type tray and preparation method thereof, antistatic anti-volatilization leakage type tray includes: the tray comprises a tray body, wherein an accommodating cavity with an opening at one end is formed in the tray body; a plurality of supporting pieces, each of which is formed as a rod-shaped piece extending toward an opening direction of the accommodating chamber, each of which is provided in the accommodating chamber at intervals; the partition plates are arranged in the accommodating cavity, and two ends of each partition plate are fixedly connected with the inner wall of the accommodating cavity; the supporting plate is formed into a plate-shaped piece and is provided with a plurality of through first through holes along the thickness direction of the supporting plate, and the supporting plate is arranged at the opening end of the mounting cavity. This application sets up backup pad and support piece through the inside at the tray, when material seepage appears or when spilling over, collects the material that spills over, effectively prevents volatilizing of the back appearance chemical of revealing of material.)

1. The utility model provides an antistatic leakage tray of preventing volatilizing which characterized in that, antistatic leakage tray of preventing volatilizing includes:

the tray comprises a tray body (1), wherein an accommodating cavity with an opening at one end is formed in the tray body (1);

a plurality of supporting pieces (2), wherein each supporting piece (2) is formed into a rod-shaped piece extending towards the opening direction of the containing cavity, and each supporting piece (2) is arranged in the containing cavity at intervals so as to fix a product to be carried through the plurality of supporting pieces (2);

the partition plates (3) are arranged in the accommodating cavity, and two ends of each partition plate (3) are fixedly connected with the inner wall of the accommodating cavity so that the accommodating cavity is divided into a plurality of mounting cavities with one ends not opened;

the supporting plate (4) is formed into a plate-shaped piece and is provided with a plurality of through first through holes along the thickness direction of the plate-shaped piece, the supporting plate (4) is arranged at the opening end of the mounting cavity, and one side of the supporting plate (4) is connected with one end of the supporting piece (2) in an abutting mode.

2. The tray according to claim 1, further comprising:

the non-return films (5) are arranged between the supporting plate (4) and the supporting pieces (2) and are arranged at the opening end of the mounting cavity, and each non-return film (5) is fixedly connected with one side of the partition plate (3) and the inner wall of the mounting cavity to seal the mounting cavity;

the pressure sensor (6) is arranged in the sealed installation cavity to monitor the pressure in the installation cavity.

3. The antistatic and anti-volatilization leakage tray as set forth in claim 1, which comprises the following components in parts by weight:

50-75 parts of high-density polyethylene;

2.5-4 parts of antistatic modified particles;

1.5-2.5 parts of light calcium carbonate;

0.5-1.0 part of light stabilizer;

1-2 parts of an antioxidant;

the antistatic modified particles are 200-mesh expanded graphite particles.

4. The antistatic and anti-volatilization leakage tray as claimed in claim 3, wherein the expanded graphite particles are porous expanded graphite particles and are prepared by the following method:

(1) respectively weighing 50-80 parts by weight of deionized water, 3.5-4 parts by weight of fibroin, 0.5-1.0 part by weight of tween-80 and 1.0-1.5 parts by weight of rosin, stirring, mixing, keeping the temperature and stirring to obtain a mixed solution, and performing ultrasonic dispersion to obtain a nano emulsion;

(2) respectively weighing 15-20 parts by weight of sulfuric acid, 3-5 parts by weight of peracetic acid and 1-2 parts by weight of potassium dichromate, stirring and mixing to obtain an oxidation modification liquid, adding flake graphite into the oxidation modification liquid according to the mass ratio of 1:8, stirring, mixing, standing, filtering, taking a lower layer precipitate, washing and drying to obtain modified graphite;

(3) placing the modified graphite into the nano emulsion according to the mass ratio of 1: 6-8, stirring at a high speed, standing and filtering, taking and drying a filter cake to obtain dry particles, placing the dry particles into a muffle furnace, carrying out temperature programming, carrying out heat preservation and puffing treatment, standing and cooling to room temperature, and sieving with a 200-mesh sieve to obtain porous expanded graphite particles.

5. The antistatic and anti-volatilization leakage tray as set forth in claim 4, wherein the temperature-raising, heat-preserving and puffing treatment in step (3) comprises: heating to 750-800 ℃ at the speed of 10 ℃/s, and carrying out heat preservation and puffing treatment for 15-20 min.

6. The antistatic and anti-volatilization leakage tray as claimed in claim 4, wherein the antistatic modified particles comprise nano titanium dioxide particles coated on the surface of the porous expanded graphite particles.

7. The antistatic and anti-volatilization leakage tray as claimed in claim 6, wherein the antistatic modified particles are prepared by the following method:

(1) putting deionized water, hydrochloric acid, absolute ethyl alcohol and tetrabutyl titanate into a reaction kettle, stirring and mixing to obtain a reaction solution, dropwise adding a silane coupling agent into the reaction solution, and after dropwise adding is finished, keeping the temperature at 75-80 ℃ for reaction for 1-2 hours to obtain a modified sol solution;

(2) adding the porous expanded graphite particles into the modified sol solution according to the mass ratio of 1: 5-8, pressurizing, preserving heat and homogenizing to obtain a mixed sol solution, aging the mixed sol solution at room temperature, preserving heat, drying, crushing, grinding and dispersing, and sieving with a 500-mesh sieve to obtain the modified filler particles.

8. The antistatic and anti-volatilization leakage tray as claimed in claim 7, wherein the pressure and heat preservation homogenization treatment in step (2) is a heat preservation homogenization treatment at 55-60 ℃ under 3-5 MPa for 3-5 h.

9. The preparation method of the antistatic volatilization-proof leakage-proof tray is characterized by comprising the following preparation steps of:

s1, mixing the high-density polyethylene, the antistatic modified particles, the light calcium carbonate, the light stabilizer and the antioxidant at a high speed according to the formula to obtain a mixture;

and S2, placing the mixture in a double-screw extruder, extruding and granulating, collecting dry particles, and performing injection molding on the dry particles to obtain the antistatic volatilization-proof leakage-proof tray.

Technical Field

The application relates to the field of antistatic plastics, in particular to an antistatic and anti-volatilization leakage type tray and a preparation method thereof.

Background

High Density Polyethylene (HDPE) has been widely used in the field of packaging and for making various anticorrosive packaging materials, because of its moderate cost, stable and reliable production process, and excellent product comprehensive properties, its application range is gradually expanded. However, since HDPE is a non-polar molecular structure, the molecular chain formed by covalent bonds of HDPE can not be ionized, and is difficult to transfer free electrons, once electrons are lost due to friction and charged, the HDPE is difficult to eliminate, which brings inconvenience to processing and use, affects the technological properties of the product, and limits the application of polyethylene products in the field of avoiding static electricity. In order to meet the application of polyethylene products in these special fields, it is necessary to modify polyethylene to have antistatic properties.

The related technology can refer to Chinese invention patent with publication number CN107033463A, and discloses a composite flame-retardant antistatic pipeline and a preparation method thereof, wherein the composite flame-retardant antistatic pipeline comprises an inner layer and an outer layer, and the inner layer is prepared from raw materials comprising high-density polyethylene, conductive carbon fiber powder and conductive carbon black; the outer layer is prepared from raw materials including polypropylene, high-density polyethylene, conductive carbon black, a flame retardant and a flame-retardant synergist.

In view of the above-mentioned related technologies, the inventors believe that in the conventional antistatic modification process of high-density polyethylene, a scheme of simply adding carbon black as an antistatic agent may cause local concentration of carbon black, so that the conductivity of the material is unstable, and at the same time, a high carbon black content may negatively affect the molding and mechanical properties of the material, so that the melt viscosity of the material is increased and the impact strength is reduced.

Disclosure of Invention

In order to overcome high density polyethylene and adopt carbon black to use the defect that can reduce high density polyethylene's mechanical properties and conductivity for antistatic agent, this application provides an antistatic anti-volatilization leakage type tray.

In a first aspect, the present application provides an antistatic anti-volatilization leakage type tray, the antistatic anti-volatilization leakage type tray includes: the tray comprises a tray body, wherein an accommodating cavity with an opening at one end is formed in the tray body; the supporting pieces are formed into rod-shaped pieces extending towards the opening direction of the accommodating cavity, and are arranged in the accommodating cavity at intervals so as to fix the product to be carried through the supporting pieces; the partition plates are arranged in the accommodating cavity, and two ends of each partition plate are fixedly connected with the inner wall of the accommodating cavity so that the accommodating cavity is divided into a plurality of mounting cavities with one ends not opened; the supporting plate is formed into a plate-shaped piece and is provided with a plurality of through first through holes along the thickness direction of the plate-shaped piece, the supporting plate is arranged at the opening end of the mounting cavity, and one side of the supporting plate is connected with one ends of the supporting pieces in an abutting mode.

Through adopting above-mentioned technical scheme, because this application sets up backup pad and support piece through the inside at the tray, can effectively support the backup pad in the top of tray, when the in-service use, the material that bears prevents in the backup pad, when the phenomenon that the material seepage perhaps spills over appears, thereby the first through-hole of seting up can leak the material of seepage and collect the material that overflows in the inside chamber that holds of tray, effectively prevents appearing volatilizing of chemical after revealing of material.

Further, antistatic anti-volatilization leakage type tray still includes: each non-return film is arranged between the supporting plate and the supporting pieces and is arranged at the opening end of the mounting cavity, and each non-return film is fixedly connected with one side of the partition plate and the inner wall of the mounting cavity to seal the mounting cavity; the pressure sensor is arranged in the sealed installation cavity to monitor the pressure in the installation cavity.

Through adopting above-mentioned technical scheme, because this application is provided with the contrary membrane of ending between backup pad and support piece, can be because self weight after the medicine infiltration of seepage comes out, push down and effective seepage to holding in the chamber will end contrary the membrane, after the medicine production of permeating to holding in the chamber volatilizees, end the escape that sets up of contrary membrane can effectively block the medicine of volatilizing and scatter and disappear, thereby guarantee that the medicine of seepage can not volatilize at will, this application sets up the sensor in the installation cavity simultaneously, effectively detect the pressure in the installation cavity, thereby monitor the inside pressure of tray, the hidden danger that the too big explosion that can cause of pressure in the installation cavity has been reduced.

Further, the antistatic and anti-volatilization leakage-proof tray comprises the following substances in parts by weight: 50-75 parts of high-density polyethylene, 2.5-4 parts of antistatic modified particles, 1.5-2.5 parts of light calcium carbonate, 0.5-1.0 part of light stabilizer and 1-2 parts of antioxidant; the antistatic modified particles are 200-mesh expanded graphite particles.

Through adopting above-mentioned technical scheme, because the expanded graphite that this application adopted replaces traditional carbon black material, because expanded graphite is the worm form material that has great specific surface area, add it to inside the high density polyethylene material, through the micropore adsorption in the expanded graphite, can improve its and high density polyethylene material's bonding strength, thereby when in-service use, improve the compatibility between antistatic modified particle and the high density polyethylene material, thereby when effectively having improved the electric conductivity of high density polyethylene, can also improve its mechanical properties.

Further, the expanded graphite particles are porous expanded graphite particles and are prepared by the following method: (1) respectively weighing 50-80 parts by weight of deionized water, 3.5-4 parts by weight of fibroin, 0.5-1.0 part by weight of tween-80 and 1.0-1.5 parts by weight of rosin, stirring, mixing, keeping the temperature and stirring to obtain a mixed solution, and performing ultrasonic dispersion to obtain a nano emulsion; (2) respectively weighing 15-20 parts by weight of sulfuric acid, 3-5 parts by weight of peracetic acid and 1-2 parts by weight of potassium dichromate, stirring and mixing to obtain an oxidation modification liquid, adding flake graphite into the oxidation modification liquid according to the mass ratio of 1:8, stirring, mixing, standing, filtering, taking a lower layer precipitate, washing and drying to obtain modified graphite; (3) placing the modified graphite into the nano emulsion according to the mass ratio of 1: 6-8, stirring at a high speed, standing and filtering, taking and drying a filter cake to obtain dry particles, placing the dry particles into a muffle furnace, carrying out temperature programming, carrying out heat preservation and puffing treatment, standing and cooling to room temperature, and sieving with a 200-mesh sieve to obtain porous expanded graphite particles.

By adopting the technical scheme, because this application adopts rosin and albumen earlier to carry out good cladding to the expanded graphite surface, through adding the rosin after, emulsification modification and formation tiny particle disperse system make expanded graphite particle surface form the coating film that disperses rosin and fibroin, in follow-up high temperature calcination process, high temperature state makes carbon black granule begin to decompose, and the coating film of cladding on the expanded graphite surface is the carbonization earlier then decomposes, has the decomposition time difference between the two, but final formation porous structure's expanded graphite particle.

Further, the heating, heat preservation and puffing treatment in the step (3) comprises the following steps: heating to 750-800 ℃ at the speed of 10 ℃/s, and carrying out heat preservation and puffing treatment for 15-20 min.

Through adopting above-mentioned technical scheme, because the speed of intensification has been optimized in this application, at the intensification in-process, through steady temperature-raising processing, at the intensification in-process, the effective cladding of carbomorphism membrane of formation is on expanded graphite surface, and the expanded graphite who does not have the silk protein membrane to handle can be by oxidative decomposition to make expanded graphite form porous structure, further improved expanded graphite's structural performance.

Further, the antistatic modified particles comprise nano titanium dioxide particles coated on the surfaces of the porous expanded graphite particles.

By adopting the technical scheme, the nano titanium dioxide layer is coated on the side of the porous expanded graphite particles, the agglomeration performance of the porous expanded graphite is reduced through the coated titanium dioxide particles, and the dispersion strength of the porous expanded graphite is improved, so that the porous expanded graphite can be effectively dispersed into high-density polyethylene, and the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are further improved.

Further, the antistatic modified particles are prepared by adopting the following method: (1) putting deionized water, hydrochloric acid, absolute ethyl alcohol and tetrabutyl titanate into a reaction kettle, stirring and mixing to obtain a reaction solution, dropwise adding a silane coupling agent into the reaction solution, and after dropwise adding is finished, keeping the temperature at 75-80 ℃ for reaction for 1-2 hours to obtain a modified sol solution; (2) adding the porous expanded graphite particles into the modified sol solution according to the mass ratio of 1: 5-8, pressurizing, preserving heat and homogenizing to obtain a mixed sol solution, aging the mixed sol solution at room temperature, preserving heat, drying, crushing, grinding and dispersing, and sieving with a 500-mesh sieve to obtain the modified filler particles.

By adopting the technical scheme, the titanium dioxide is formed into a sol system, and the pores in the porous expanded graphite are well supported and coated, so that the filling structure of the expanded graphite in the high-density polyethylene is improved, and the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are further improved.

Further, the pressurizing, heat-preserving and homogenizing treatment in the step (2) is carried out for 3-5 hours at the temperature of 55-60 ℃ under the pressure of 3-5 MPa.

By adopting the technical scheme, the pressure and the temperature of the mixture of the expanded graphite and the titanium dioxide sol are optimized, so that the titanium dioxide sol can permeate into the pores in the expanded graphite under the action of proper pressure, a good permeation effect is formed in the expanded graphite, the structural strength of the expanded graphite is further improved, and the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are improved.

In a second aspect, the present application provides a method for manufacturing an antistatic and anti-volatilization leakage type tray, which includes the following manufacturing steps: s1, mixing the high-density polyethylene, the antistatic modified particles, the light calcium carbonate, the light stabilizer and the antioxidant at a high speed according to the formula to obtain a mixture; and S2, placing the mixture in a double-screw extruder, extruding and granulating, collecting dry particles, and performing injection molding on the dry particles to obtain the antistatic volatilization-proof leakage-proof tray.

Through adopting above-mentioned technical scheme, because this application is earlier through carrying out high-speed mixing with each component, forms good dispersion effect after mixing at a high speed, each component of dispersion uniformity extrudes the granulation through the twin-screw after, through moulding plastics integrated into one piece, has effectively simplified the step of the seepage type tray of preventing volatilizing of production index, has improved the efficiency of this tray preparation.

In summary, the present application includes at least one of the following beneficial technical effects:

first, this application sets up backup pad and support piece through the inside at the tray, can effectively support the backup pad in the top of tray, and when the in-service use, the material that bears prevents in the backup pad, when the material seepage appears or when the phenomenon that spills over, thereby the first through-hole of seting up can leak the material of seepage and collect the material that overflows in the inside chamber that holds of tray, effectively prevents appearing volatilizing of chemical after revealing of material.

Second, be provided with between backup pad and support piece and prevent contrary membrane, after the medicine infiltration of seepage comes out, can be because self weight, will prevent contrary the membrane and push down and effectively ooze to holding in the chamber, after the medicine production that oozes to holding in the chamber volatilizees, prevent the escape that can effectively block the medicine of volatilizing and scatter and disappear of setting up of contrary membrane, thereby guarantee that the medicine of seepage can not volatilize at will, this application sets up the sensor in the installation cavity simultaneously, effectively detect the pressure in the installation cavity, thereby monitor the inside pressure of tray, the hidden danger that the too big explosion that can cause of pressure in the installation cavity has been reduced.

Third, the expanded graphite that this application adopted replaces traditional carbon black material, because expanded graphite is the worm form material that has great specific surface area, add it to inside the high density polyethylene material, through the micropore adsorption in the expanded graphite, can improve its and high density polyethylene material's bonding strength to when in actual use, improve the compatibility between antistatic modified particle and the high density polyethylene material, thereby when effectively having improved the electric conductivity of high density polyethylene, can also improve its mechanical properties.

And fourthly, the titanium dioxide is formed into a sol system, and the good supporting and coating effects are formed on the pores in the porous expanded graphite, so that the filling performance of the expanded graphite in the high-density polyethylene is improved, and the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are further improved.

Drawings

Fig. 1 is an exploded view of an antistatic and anti-volatilization leakage type tray according to an embodiment of the present application.

Description of reference numerals: 1. a tray body; 2. a support member; 3. a partition plate; 4. a support plate; 5. a non-return membrane; 6. a pressure sensor.

Detailed Description

The present application will be described in further detail with reference to fig. 1 and the examples.

Examples

Example 1

The embodiment of the application discloses antistatic leakage type tray of preventing volatilizing. Referring to fig. 1, a tray body 1 is a container with an opening at one end, a plurality of supporting pieces 2 are arranged at intervals in the tray body 1 along the direction of the inner wall of the tray, and spaces formed by the supporting pieces 2 and the supporting pieces 2 at intervals can be arranged according to materials to be loaded, so that the supporting pieces 2 can have a good effect of fixedly supporting the materials;

a partition plate 3 with two ends fixedly connected with the inner wall of the tray body 1 is arranged in the tray body 1, one part of the tray body 1 is divided into two parts by the partition plate 3, the upper end of the tray body is fixedly coated with a non-return membrane 5 to form a sealed installation cavity structure, the periphery of the non-return membrane 5 is fixedly connected with the inner wall of the installation cavity, and diagonal lines on the non-return membrane 5 are mutually divided and are arranged into openable thin-film structures;

above every installation cavity structure, the butt is provided with backup pad 4, the bottom surface links to each other with support piece 2's top surface butt under backup pad 4, make the material can effectually lay in backup pad 4, after the material is revealed on backup pad 4, the medicine of seepage drips on ending membrane 5 surfaces through the first through-hole that link up the setting on backup pad 4 surface, constantly move down under the effect of its self weight and seepage to the installation cavity structure in, after the seepage was accomplished, end and end membrane 5 and seal the installation cavity again under its self elastic action, thereby make the medicine of seepage can't volatilize to the air neutralization, thereby make the tray realize the effect of anti-volatile seepage.

Preparation example 1

Taking 500mL of deionized water, 35g of fibroin, 6g of tween-80 and 10g of rosin, stirring and mixing, placing at 45 ℃, keeping the temperature, stirring and mixing for 25min to obtain a mixed solution, placing at 200W, and performing ultrasonic dispersion treatment for 10min to obtain a nano emulsion 1;

preparation example 2

Taking 650mL of deionized water, 37g of fibroin, 7g of tween-80 and 12g of rosin, stirring and mixing, placing at 52 ℃, keeping the temperature, stirring and mixing for 27min to obtain a mixed solution, placing at 250W, and performing ultrasonic dispersion treatment for 12min to obtain a nano emulsion 2;

preparation example 3

Taking 800mL of deionized water, 40g of fibroin, 8g of tween-80 and 15g of rosin, stirring and mixing, placing at 60 ℃, keeping the temperature, stirring and mixing for 30min to obtain a mixed solution, placing at 300W, and performing ultrasonic dispersion treatment for 15min to obtain a nano emulsion 3;

example 2

Taking 80g of flake graphite with the particle size of 100 meshes, adding 200mL of sulfuric acid with the mass fraction of 80%, 50mL of peracetic acid and 20g of potassium dichromate into a stirring device, stirring, mixing, standing for 6 hours, filtering to obtain a lower-layer precipitate, washing until a washing liquid is neutral, and drying at 65 ℃ for 5 hours to obtain modified graphite;

placing the modified graphite in the nano emulsion 1, stirring for 5h at 3000r/min, standing and filtering, taking a filter cake, placing the filter cake at 50 ℃ for drying for 8h to obtain dried particles, placing the dried particles in a muffle furnace, heating to 800 ℃ at the speed of 10 ℃/s, performing heat preservation and puffing treatment for 20min, standing and cooling to room temperature, and sieving with a 200-mesh sieve to obtain porous expanded graphite particles;

putting 2000mL of deionized water, 5mL of 0.5mol/L hydrochloric acid, 25mL of absolute ethyl alcohol and 20mL of tetrabutyl titanate into a reaction kettle, stirring and mixing to obtain a reaction solution, dropwise adding 3mL of silane coupling agent KH-550 into the reaction solution, controlling the dropwise adding time to be 25min, and after the dropwise adding is finished, carrying out heat preservation reaction at 75 ℃ for 1h to obtain a modified sol solution;

adding porous expanded graphite particles into the modified sol solution according to the mass ratio of 1:5, carrying out heat preservation and homogenization treatment for 3h at the temperature of 55 ℃ under the pressure of 3MPa to obtain mixed sol solution, aging the mixed sol solution at room temperature for 6h, then carrying out heat preservation and drying at the temperature of 55 ℃ for 6h, crushing, grinding and dispersing, and sieving with a 500-mesh sieve to obtain modified filler particles;

10kg of high-density polyethylene, 500g of modified filler particles, 300g of light calcium carbonate of 2000 meshes, 100g of light stabilizer 2-hydroxybenzophenone, 180g of antioxidant-1010 and 120g of antioxidant-168 are placed in a mixer, mixed for 3min at 2500r/min and 85 ℃ to obtain a mixture, the mixture is placed in a double-screw extruder, extrusion granulation is carried out, dry particles are collected, and the dry particles are subjected to injection molding to obtain the antistatic and anti-volatilization leakage type tray.

Example 3

Taking 72g of flake graphite with the particle size of 100 meshes, adding 175mL of sulfuric acid with the mass fraction of 80%, 40mL of peracetic acid and 15g of potassium dichromate into a stirring device, stirring, mixing, standing for 7 hours, filtering to obtain a lower-layer precipitate, washing until a washing solution is neutral, and drying at 60 ℃ for 4 hours to obtain modified graphite;

placing the modified graphite in nano emulsion 2, stirring for 4h at 2750r/min, standing and filtering, taking a filter cake, placing the filter cake at 47 ℃ for drying for 7h to obtain dried particles, placing the dried particles in a muffle furnace, heating to 775 ℃ at the speed of 10 ℃/s, performing heat preservation and puffing treatment for 17min, standing and cooling to room temperature, and sieving with a 200-mesh sieve to obtain porous expanded graphite particles;

placing 1750mL of deionized water, 4mL of 0.5mol/L hydrochloric acid, 12mL of absolute ethyl alcohol and 13mL of tetrabutyl titanate in a reaction kettle, stirring and mixing to obtain a reaction solution, dropwise adding 4mL of silane coupling agent KH-550 into the reaction solution, controlling the dropwise adding time to be 27min, and after the dropwise adding is finished, carrying out heat preservation reaction at 77 ℃ for 1h to obtain a modified sol solution;

adding porous expanded graphite particles into the modified sol solution according to the mass ratio of 1:6, carrying out heat preservation and homogenization treatment for 4 hours at the temperature of 57 ℃ under 4MPa to obtain mixed sol solution, aging the mixed sol solution for 7 hours at room temperature, then carrying out heat preservation and drying for 7 hours at the temperature of 56 ℃, crushing, grinding and dispersing, and sieving with a 500-mesh sieve to obtain modified filler particles;

12kg of high-density polyethylene, 650g of modified filler particles, 400g of 2000-mesh light calcium carbonate, 150g of light stabilizer 2-hydroxybenzophenone, 190g of antioxidant-1010 and 200g of antioxidant-168 are placed in a mixer, mixed for 4min at 2750r/min and 90 ℃ to obtain a mixture, the mixture is placed in a double-screw extruder, extrusion granulation is carried out, dry particles are collected, and the dry particles are subjected to injection molding to obtain the antistatic volatilization-prevention leakage-type tray.

Example 4

Taking 80g of flake graphite with the particle size of 100 meshes, adding 200mL of sulfuric acid with the mass fraction of 80%, 50mL of peracetic acid and 20g of potassium dichromate into a stirring device, stirring, mixing, standing for 8 hours, filtering to obtain a lower-layer precipitate, washing until a washing liquid is neutral, and drying at 65 ℃ for 5 hours to obtain modified graphite;

placing the modified graphite in the nano-emulsion 3, stirring for 5h at 3000r/min, standing and filtering, taking a filter cake, placing the filter cake at 50 ℃ for drying for 8h to obtain dried particles, placing the dried particles in a muffle furnace, heating to 800 ℃ at the speed of 10 ℃/s, performing heat preservation and puffing treatment for 20min, standing and cooling to room temperature, and sieving with a 200-mesh sieve to obtain porous expanded graphite particles;

putting 2000mL of deionized water, 5mL of 0.5mol/L hydrochloric acid, 25mL of absolute ethyl alcohol and 20mL of tetrabutyl titanate into a reaction kettle, stirring and mixing to obtain a reaction solution, dropwise adding 5mL of silane coupling agent KH-550 into the reaction solution, controlling the dropwise adding time to be 30min, and after the dropwise adding is finished, carrying out heat preservation reaction at 80 ℃ for 2h to obtain a modified sol solution;

adding porous expanded graphite particles into the modified sol solution according to the mass ratio of 1:8, carrying out heat preservation and homogenization treatment for 5 hours at the temperature of 60 ℃ under the pressure of 5MPa to obtain mixed sol solution, aging the mixed sol solution for 8 hours at room temperature, then carrying out heat preservation and drying for 8 hours at the temperature of 60 ℃, crushing, grinding and dispersing, and sieving by using a 500-mesh sieve to obtain modified filler particles;

taking 15kg of high-density polyethylene, 800g of modified filler particles, 500g of 2000-mesh light calcium carbonate, 200g of light stabilizer 2-hydroxybenzophenone, 200g of antioxidant-1010 and 280g of antioxidant-168, placing the materials in a mixer, mixing at 3000r/min and 95 ℃ for 5min to obtain a mixture, placing the mixture in a double-screw extruder, carrying out extrusion granulation and collection on dry particles, and carrying out injection molding on the dry particles to obtain the antistatic volatilization-prevention leakage-type tray.

Example 5

In example 5, expanded graphite having a non-porous structure was used in place of the porous expanded graphite, and the other conditions and the component ratios were the same as in example 1.

Example 6

In example 6, the particles of the antistatic modified material used in example 1 of the present application were not added to the surface of the porous expanded graphite particles, and the other conditions and the component ratios were the same as those in example 1.

Performance test

The antistatic performance of the antistatic and anti-volatilization leakage type trays prepared in examples 2 to 6 was tested.

Detection method/test method

The antistatic performance is measured according to GB/T1410-2006, the voltage is 1000V, the diameter of a sample is 100mm, and the thickness is 4 mm; the specific detection results are shown in the following table 1:

TABLE 1 EXAMPLES 2 TO 6 antistatic Property test Table

Referring to the comparison of the performance tests of table 1, it can be found that:

comparing the performances of the examples 2 to 4, the antistatic performance of the examples 2 to 4 is obviously reduced along with the increase of the usage amount of the antistatic agent particles adopted in the application, which shows that the application improves the dispersion strength of the porous expanded graphite by coating the nano titanium dioxide layer on the sides of the porous expanded graphite particles, so that the porous expanded graphite can be effectively dispersed into the high-density polyethylene, and the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are further improved.

Comparing the performances of the embodiment 2 and the embodiment 5, the embodiment 5 adopts the expanded graphite with a non-porous structure to replace the porous expanded graphite, and the combination of the table 1 shows that the antistatic performance is obviously reduced, which shows that the matrix loading performance and the antistatic effect of the antistatic agent particles are effectively improved by adopting the expanded graphite with a porous structure, so that the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are further improved.

Comparing the performances of the embodiment 2 and the embodiment 6, the embodiment 6 does not add nano titanium dioxide particles on the surfaces of the porous expanded graphite particles to replace the antistatic modified particles adopted in the embodiment 1, and meanwhile, the combination of the table 1 shows that the antistatic performance is obviously reduced, which indicates that the technical scheme of the application coats the nano titanium dioxide layer in the porous expanded graphite particles, so that the dispersion strength of the porous expanded graphite is improved, and the mechanical property and the antistatic property of the high-density polyethylene after the expanded graphite is added are further improved.

Comparative example

Comparative examples 1 to 3

In comparative examples 1 to 3, crystalline flake graphite is used to replace antistatic agent particles adopted in the application, and the conditions and component proportions are the same as in comparative examples 1 to 3 corresponding to examples 1 to 3, respectively.

Comparative examples 4 to 6

In comparative examples 4 to 6, porous diatomite is used to replace the porous expanded graphite used in the application to prepare the antistatic agent, and the antistatic agent is the same as the corresponding comparative examples 4 to 6 in examples 1 to 3, and the other conditions and component proportions are the same.

Comparative examples 7 to 9

In comparative examples 7-9, the temperature is raised to 750-800 ℃ at a rate of 5 ℃/s, and the thermal insulation puffing treatment is adjusted for 15-20 min, which is the same as comparative examples 7-9 corresponding to examples 1-3, respectively, and the rest conditions and component proportions are the same.

In comparative examples 10 to 12, the nano silica particles added to the surfaces of the antistatic agent porous expanded graphite particles were the same as in comparative examples 10 to 12 corresponding to examples 1 to 3, respectively, except for the conditions and the component ratios.

Performance test

The antistatic performance is measured according to GB/T1410-2006, the voltage is 1000V, the diameter of a sample is 100mm, and the thickness is 4 mm; the specific detection results are shown in the following table 2:

TABLE 2 detection table for antistatic performance of comparative examples 1 to 12

Referring to the comparison of the performance tests of table 2, it can be found that:

comparing the comparative examples 1-3 with the examples 1-3, the comparative examples adopt crystalline flake graphite to replace antistatic agent particles adopted in the application, and the antistatic effect is obviously reduced, which shows that the expanded graphite adopted in the application replaces the traditional carbon black material, the bonding strength between the expanded graphite and a high-density polyethylene material can be improved, and therefore, the compatibility between the antistatic modified particles and the high-density polyethylene material is improved in practical use, and the conductivity of the high-density polyethylene is effectively improved.

Comparing the comparative examples 4-6 with the examples 1-3, the porous diatomite used in the comparative examples replaces the porous expanded graphite used in the present application to prepare the antistatic agent, so that the antistatic performance of the antistatic agent is greatly reduced, which shows that only the carbon material is used in the present application to effectively improve the conductive performance of the high density polyethylene and improve the antistatic effect of the high density polyethylene.

Comparing the comparative examples 7-9 of the application with the examples 1-3 in sequence respectively, and in the preparation process of the comparative examples 7-9, adjusting the heat preservation puffing treatment to raise the temperature to 750-800 ℃ at a rate of 5 ℃/s, and performing the heat preservation puffing treatment for 15-20 min, so that the structure of the porous expanded graphite cannot be effectively realized by the finally prepared composite base material, and meanwhile, as can be seen from the table 2, the antistatic effect is remarkably reduced, which shows that the temperature of the application is adjusted, through the stable heating treatment, the fibroin coated on the surface of the expanded graphite is effectively carbonized in the heating process, the expanded graphite which is not coated with the fibroin film treatment can be oxidized and decomposed, so that the expanded graphite is formed into a porous structure, and the structural performance of the expanded graphite is further improved.

Comparing the comparative examples 10-12 with the examples 1-3, the nano-silica particles are added on the surfaces of the antistatic agent porous expanded graphite particles in the comparative examples 10-12, and the antistatic effect is remarkably reduced as shown in table 2, which shows that the excellent scheme of the application coats the nano-titania layer on the edges of the porous expanded graphite particles, so that the dispersion strength of the porous expanded graphite is improved, the porous expanded graphite can be effectively dispersed into high-density polyethylene, and the antistatic performance of the high-density polyethylene after the expanded graphite is added is further improved.

The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.