阅读说明：本技术 一种可降低室内空气中颗粒物密度的纤维板制备方法 (Preparation method of fiberboard capable of reducing density of particulate matters in indoor air ) 是由 赵卫 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种可降低室内空气中颗粒物密度的纤维板制备方法,制备方法如下：1)将改性环氧树脂胶加入到搅拌容器中,加入防腐剂和防水剂搅拌后制得混合改性环氧树脂胶；2)将原材料加工成为纤维状,经温水浸泡后得到湿型木材纤维；3)将湿型木材纤维铺装入模具中,在纤维表面喷覆改性环氧树脂胶,经预压得到板坯；4)将板坯置于微波装置中进行微波预处理,待处理结束后,再置于高强磁场中进行二次处理；5)将板坯进行热压定型,冷却后进行锯边及分割,再经砂光机进行砂光,即可制得。该纤维板结构细密,表面硬度高,粘结强度高,同时具有还具有很好的改善室内空气质量的功效,具有很好的应用前景。(The invention discloses a preparation method of a fiberboard capable of reducing the density of particles in indoor air, which comprises the following steps: 1) adding the modified epoxy resin adhesive into a stirring container, adding a preservative and a waterproof agent, and stirring to obtain a mixed modified epoxy resin adhesive; 2) processing the raw materials into fibers, and soaking the fibers in warm water to obtain wet wood fibers; 3) laying wet wood fibers in a mold, spraying modified epoxy resin glue on the surfaces of the fibers, and prepressing to obtain a plate blank; 4) placing the plate blank in a microwave device for microwave pretreatment, and after the treatment is finished, placing the plate blank in a high-intensity magnetic field for secondary treatment; 5) and (3) carrying out hot-pressing and shaping on the plate blank, carrying out edge sawing and segmentation after cooling, and sanding by a sanding machine to obtain the finished product. The fiber board has the advantages of fine structure, high surface hardness and high bonding strength, and also has the good effect of improving the indoor air quality, thereby having good application prospect.)

1. A preparation method of a fiberboard capable of reducing the density of particles in indoor air is characterized by comprising the following steps:

1) adding the modified epoxy resin adhesive into a stirring container, adding a preservative and a waterproof agent, and mixing and stirring to obtain a mixed modified epoxy resin adhesive;

2) processing the raw materials into fibers, adding the fibers into warm water for soaking, and draining water after soaking to obtain wet wood fibers;

3) paving wet wood fibers in a mold, spraying modified epoxy resin glue on the surfaces of the fibers, and prepressing to obtain a plate blank;

4) placing the plate blank in a microwave device for microwave pretreatment, and after the treatment is finished, placing the pretreated plate blank in a high-intensity magnetic field for secondary treatment;

5) and (3) placing the processed plate blank in a hot press for hot pressing and shaping, cooling, then sawing edges and cutting, and sanding by a sanding machine to obtain the finished product fiberboard.

2. The method for preparing fiberboard capable of reducing the density of particles in indoor air according to claim 1, wherein in the step 1), the modified epoxy resin adhesive is prepared as follows:

1) taking 8-13 parts of hexadecyl trimethyl ammonium bromide, 5-7 parts of cyclohexane and 3-4 parts of amyl alcohol, mixing, adding 5-10 parts of rubidium-iron-boron magnetic powder, adding 50-80 parts of distilled water, carrying out oscillation dispersion for 10-20min under 200-plus-300W ultrasonic wave to prepare rubidium-iron-boron magnetic powder emulsion, then taking 1-2 parts of silicon carbide, adding 15-25 parts of distilled water, and carrying out oscillation dispersion for 5-15min under 200-plus-300W ultrasonic wave to prepare silicon carbide aqueous solution;

2) adding the silicon carbide aqueous solution into the rubidium-iron-boron magnetic powder emulsion, stirring for 2-3h at the rotation speed of 150-200r/min, removing the supernatant, washing the solid-phase product with ethanol until the filtrate is neutral, and then drying in an oven at 50-60 ℃ to constant weight to obtain a silicon carbide/rubidium-iron-boron magnetic powder composite;

3) adding the silicon carbide/rubidium-iron-boron magnetic powder compound into distilled water, mixing and stirring to prepare a silicon carbide/rubidium-iron-boron magnetic powder compound aqueous solution with the mass fraction of 2-5%, then adding 3-5 parts of acrylic acid, oscillating and dispersing for 40-50min under 300-400W ultrasonic wave, then adding 0.1-0.3 part of ammonium persulfate and 4-5 parts of sodium hydroxide solution with the concentration of 3-5mol/L, heating to 60-70 ℃, reacting at constant temperature for 3-4h, filtering a reaction product, and then placing in a 50-60 ℃ drying oven to dry to constant weight to obtain the modified silicon carbide/rubidium-iron-boron magnetic powder compound;

4) and (2) taking 40-60 parts of epoxy resin matrix, adding the modified silicon carbide/rubidium-iron-boron magnetic powder compound, grinding for 1-2 hours in a grinder with the rotating speed of 50-130r/min, then adding 0.5-1 part of curing agent, and mixing and stirring uniformly to obtain the modified epoxy resin adhesive.

3. The method for preparing a fiberboard capable of reducing the density of particles in indoor air according to claim 1, wherein in the step 1), the preservative is dioctyl isothiazolinone, and the amount of the preservative is 1-2% of the addition amount of the modified epoxy resin adhesive; the waterproof agent is paraffin emulsion, and the dosage of the waterproof agent is 2-3% of the addition amount of the modified epoxy resin adhesive.

4. The method for preparing a fiber board capable of reducing the density of particles in indoor air according to claim 1, wherein in the step 2), the temperature for soaking in warm water is 60-80 ℃, and the soaking time is 5-8 h.

5. The method for preparing fiberboard capable of reducing the density of particles in indoor air according to claim 1, wherein in the step 3), the spraying amount of the modified epoxy resin adhesive is 2-7% of the weight of wood fibers; the pre-pressing time is 20-30min, the pre-pressing pressure is 1000-1500t, and the pre-pressing temperature is normal temperature.

6. The method as claimed in claim 1, wherein in step 4), the frequency of the microwave device is 1500-; the magnetic field intensity is 4000-6000GS, and the treatment time is 30-50 min.

7. The method as claimed in claim 1, wherein in step 5), the hot pressing time is 2-5min, the hot pressing pressure is 1.5-2.0MPa, and the hot pressing temperature is 150-230 ℃.

Technical Field

The invention belongs to the technical field of fiberboard processing, and particularly relates to a fiberboard preparation method capable of reducing the density of particles in indoor air.

Background

In recent years, the solid wood fiber board has been developed rapidly due to its characteristics of uniform material, small difference in longitudinal and transverse strength, and being not easy to crack, and is widely used in the industries of furniture, decoration, building materials, kitchens and the like. The fiber board is an artificial board which is made of wood fibers or other plant cellulose fibers as raw materials and is glued under the action of heat and pressure after adhesive is applied, the fiber board is uniform in structure and good in processing performance, can be processed into large-width boards according to needs, and is a good raw material for manufacturing furniture of different specifications and styles.

With the importance of people on the environmental quality, more and more families are equipped with air purification devices indoors in order to reduce dust suspended in indoor air and improve the air quality, but the devices not only occupy indoor space, but also can work in a power-on state, and not only increase the burden of the families, but also have certain dangerousness. Therefore, intensive research on fiber boards, which are both strong and durable and can also assist in improving air quality, is a technical problem that needs to be solved urgently by those skilled in the art.

Disclosure of Invention

The invention aims to provide a preparation method of a fiberboard capable of reducing the density of particles in indoor air, aiming at the existing problems.

The invention is realized by the following technical scheme:

a preparation method of a fiberboard capable of reducing the density of particles in indoor air comprises the following specific steps:

1) adding the modified epoxy resin adhesive into a stirring container, adding a preservative and a waterproof agent, and mixing and stirring to obtain a mixed modified epoxy resin adhesive;

2) processing the raw materials into fibers, adding the fibers into warm water for soaking, and draining water after soaking to obtain wet wood fibers;

3) paving wet wood fibers in a mold, spraying modified epoxy resin glue on the surfaces of the fibers, and prepressing to obtain a plate blank;

4) placing the plate blank in a microwave device for microwave pretreatment, and after the treatment is finished, placing the pretreated plate blank in a high-intensity magnetic field for secondary treatment;

5) and (3) placing the processed plate blank in a hot press for hot pressing and shaping, cooling, then sawing edges and cutting, and sanding by a sanding machine to obtain the finished product fiberboard.

Preferably, a method for preparing a fiberboard capable of reducing the density of particles in indoor air, wherein in step 1), the method for preparing the modified epoxy resin glue comprises the following steps:

1) taking 8-13 parts of hexadecyl trimethyl ammonium bromide, 5-7 parts of cyclohexane and 3-4 parts of amyl alcohol, mixing, adding 5-10 parts of rubidium-iron-boron magnetic powder, adding 50-80 parts of distilled water, carrying out oscillation dispersion for 10-20min under 200-plus-300W ultrasonic wave to prepare rubidium-iron-boron magnetic powder emulsion, then taking 1-2 parts of silicon carbide, adding 15-25 parts of distilled water, and carrying out oscillation dispersion for 5-15min under 200-plus-300W ultrasonic wave to prepare silicon carbide aqueous solution;

2) adding the silicon carbide aqueous solution into the rubidium-iron-boron magnetic powder emulsion, stirring for 2-3h at the rotation speed of 150-200r/min, removing the supernatant, washing the solid-phase product with ethanol until the filtrate is neutral, and then drying in an oven at 50-60 ℃ to constant weight to obtain a silicon carbide/rubidium-iron-boron magnetic powder composite;

3) adding the silicon carbide/rubidium-iron-boron magnetic powder compound into distilled water, mixing and stirring to prepare a silicon carbide/rubidium-iron-boron magnetic powder compound aqueous solution with the mass fraction of 2-5%, then adding 3-5 parts of acrylic acid, oscillating and dispersing for 40-50min under 300-400W ultrasonic wave, then adding 0.1-0.3 part of ammonium persulfate and 4-5 parts of sodium hydroxide solution with the concentration of 3-5mol/L, heating to 60-70 ℃, reacting at constant temperature for 3-4h, filtering a reaction product, and then placing in a 50-60 ℃ drying oven to dry to constant weight to obtain the modified silicon carbide/rubidium-iron-boron magnetic powder compound;

4) and (2) taking 40-60 parts of epoxy resin matrix, adding the modified silicon carbide/rubidium-iron-boron magnetic powder compound, grinding for 1-2 hours in a grinder with the rotating speed of 50-130r/min, then adding 0.5-1 part of curing agent, and mixing and stirring uniformly to obtain the modified epoxy resin adhesive.

Preferably, in the step 1), the preservative is dioctyl isothiazolinone, and the using amount of the preservative is 1-2% of the adding amount of the modified epoxy resin adhesive; the waterproof agent is paraffin emulsion, and the dosage of the waterproof agent is 2-3% of the addition amount of the modified epoxy resin adhesive.

Preferably, the preparation method of the fiberboard capable of reducing the density of particles in indoor air comprises the step 2), wherein the temperature for soaking in warm water is 60-80 ℃, and the soaking time is 5-8 hours.

Preferably, the preparation method of the fiberboard capable of reducing the density of particles in indoor air comprises the following steps of 3), wherein the spraying amount of the modified epoxy resin glue is 2-7% of the weight of wood fibers; the pre-pressing time is 20-30min, the pre-pressing pressure is 1000-1500t, and the pre-pressing temperature is normal temperature.

Preferably, the preparation method of the fiber board capable of reducing the density of the particles in the indoor air comprises the following steps of 4), wherein the frequency of the microwave device is 1500-2000MHz, and the treatment time is 50-80 min; the magnetic field intensity is 4000-6000GS, and the treatment time is 30-50 min.

Preferably, in the step 5), the hot pressing time is 2-5min, the hot pressing pressure is 1.5-2.0MPa, and the hot pressing temperature is 150-.

Compared with the prior art, the invention has the following advantages:

1. the fiberboard prepared by the invention has the advantages of fine structure, high surface hardness and high bonding strength, also has good effect of improving the indoor air quality, can be widely applied to industries such as furniture, decoration, building materials, kitchens and the like, and has good application prospect. Firstly, the raw materials are processed into fibers and then are placed in warm water for soaking, so that the softening of wood fibers can be accelerated, the processing performance of the wood fibers is improved, and the wood fibers are beneficial to the subsequent treatment; secondly, paving the wood fibers in a mold, spraying modified epoxy resin glue on the surfaces of the fibers, and then performing pre-pressing treatment, wherein through pre-pressing, on one hand, the gaps among the wood fibers can be reduced, and the compactness is improved, on the other hand, the moisture in the wood fibers can be extruded, so that the wettability of the surfaces of the plates is improved, and the improvement of the permeability of the modified epoxy resin glue is facilitated, so that the penetration of the modified epoxy resin glue into the plates can be accelerated; secondly, the board is subjected to microwave treatment, so that the evaporation of water in the board can be further accelerated under the action of microwaves, meanwhile, the movement of molecules of components in the modified epoxy resin adhesive can be accelerated by heat generated by the microwaves, and the interpenetration flow of the modified epoxy resin adhesive in gaps of the board is promoted, so that the bonding strength of the board is improved; and then placing the board in a high-intensity magnetic field for secondary treatment, separating the modified silicon carbide/rubidium iron boron magnetic powder compound added in the modified epoxy resin glue from each other under the action of the magnetic field, so that the modified silicon carbide/rubidium iron boron magnetic powder compound is uniformly dispersed in the board and can be well filled in gaps of the board, thereby improving the density of the board, and simultaneously, under the action of the magnetic field, enhancing the magnetism of the modified silicon carbide/rubidium iron boron magnetic powder compound, thereby enabling the board to generate a magnetic field around the board, accelerating the settling velocity of dust particles in the air, reducing dust in the air and improving the indoor PM 2.5.

2. According to the prepared fiberboard, the added modified epoxy resin adhesive is a compound formed by reacting silicon carbide and rubidium-iron-boron magnetic powder, then the silicon carbide/rubidium-iron-boron magnetic powder compound and acrylic acid are uniformly dispersed in water by utilizing ultrasonic waves, and the macromolecule of the silicon carbide/rubidium-iron-boron magnetic powder compound and polyacrylic acid is bonded by initiating in-situ polymerization and macromolecule reaction, so that the dispersibility and compatibility of the silicon carbide/rubidium-iron-boron magnetic powder compound in a composite material are improved; and then grinding the modified silicon carbide/rubidium-iron-boron magnetic powder compound and the epoxy resin matrix to obtain the magnetic powder. The rubidium iron boron magnetic powder can be used as magnetic particles to generate a weak magnetic field, so that dust suspended in air can be well removed; the silicon carbide can prevent the oxidation of the rubidium, iron and boron magnetic powder and can also enhance the hardness of the plate.

Detailed Description

The present invention will be further described with reference to specific embodiments.