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Preparation method of formaldehyde adsorbing and decomposing wood-plastic composite board

A formaldehyde adsorption and composite board technology, applied in the field of wood-plastic materials, can solve the problems of excessive release of free formaldehyde, physical injury, environmental pollution, etc., and achieve the effects of simple acquisition, high compatibility, and simple preparation process

Inactive Publication Date: 2017-02-01
雷春生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention: Aiming at the problem that the release of free formaldehyde in wood-based panels exceeds the standard, which not only causes harm to people's bodies, but also pollutes the environment, a preparation of formaldehyde adsorption and decomposition wood-plastic composite board is provided Method, the present invention pulverizes rice straw and calcines to obtain carbonized powder, mixes the carbonized powder with polyvinyl chloride, extrudes and granulates, soaks the obtained particles in sulfuric acid solution, and grinds aluminum oxide and manganese dioxide powder into superfine The powder is made into a suspension, the acid-soaked particles are put into the suspension to soak, and the filter residue is filtered after soaking, and the filter residue is mixed with Chlorophytum juice and microwave-treated shaving powder, coupling agent, antioxidant, lubricant, etc. The wood-plastic composite board prepared by the present invention not only has the effect of adsorbing formaldehyde, but also can decompose the adsorbed formaldehyde, which is not only green and non-toxic Toxic, and the wood-plastic composite board has good dimensional stability, corrosion resistance, long service life, and has a wide range of application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First weigh 100g of rice straw, dry it, crush it, and pass it through a 100-mesh sieve to get rice straw powder. Put the rice straw powder into a muffle furnace, heat up to 300°C under the protection of nitrogen atmosphere, keep warm for 10 minutes, and cool down after carbonization. To room temperature, put the carbonized product into a ball mill, pass through a 400-mesh sieve after ball milling for 60 minutes, and obtain a carbonized powder; mix the above carbonized powder with polyvinyl chloride at a mass ratio of 1:10, stir and mix for 1 hour, and then add it to a twin-screw extruder , extrude and granulate at 160°C, soak the granules obtained by granulation in 80% sulfuric acid solution with a mass fraction of 1:10, soak for 3 hours and filter to obtain a filter residue, put it in an oven, and heat it at a temperature of 70°C Dry for 8 hours to obtain a dry product; weigh 12g of alumina and 15g of manganese dioxide, put them into an ultrafine pulverizer and pulveriz...

example 2

[0021]First, weigh 150g of rice straw, dry it, crush it, and pass it through a 110-mesh sieve to obtain rice straw powder. Put the rice straw powder into a muffle furnace, heat up to 350°C under the protection of a nitrogen atmosphere, keep it warm for 13 minutes, and cool down after carbonization. to room temperature, put the carbonized product into a ball mill, pass through a 410-mesh sieve after ball milling for 65 minutes, and obtain a carbonized powder; mix the above carbonized powder with polyvinyl chloride at a mass ratio of 1:10, stir and mix for 1.5 hours, and then add it to a twin-screw extruder In the process, extrude and granulate at a temperature of 170°C, soak the granules obtained by granulation in 80% sulfuric acid solution with a mass fraction of 1:10, soak for 4 hours, filter to obtain a filter residue, put it in an oven, and heat it at a temperature of 80°C. Dry for 9 hours to obtain a dry product; weigh 13g of alumina and 20g of manganese dioxide, put them i...

example 3

[0024] First, weigh 200g of rice straw, dry it, crush it, and pass it through a 120-mesh sieve to obtain rice straw powder. Put the rice straw powder into a muffle furnace, heat up to 400°C under the protection of nitrogen atmosphere, keep warm for 15 minutes, and cool down after carbonization. To room temperature, put the carbonized product into a ball mill, pass through a 420-mesh sieve after ball milling for 70 minutes, and obtain a carbonized powder; mix the above carbonized powder with polyvinyl chloride at a mass ratio of 1:10, stir and mix for 2 hours, and then add it to a twin-screw extruder , Extrude and granulate at 180°C, soak the granules obtained by granulation in 80% sulfuric acid solution with a mass fraction of 1:10, soak for 5 hours and filter to obtain a filter residue, put it in an oven, and heat it at a temperature of 90°C Dry for 10 hours to obtain a dry product; weigh 15g of alumina and 25g of manganese dioxide, put them into an ultrafine pulverizer and pu...

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Abstract

The invention relates to a preparation method of a formaldehyde adsorbing and decomposing wood-plastic composite board, and belongs to the technical field of wood-plastic materials. The preparation method comprises the following steps: pulverizing rice straws, and calcining to obtain carburized powder; mixing the carburized powder with polyvinyl chloride, extruding, granulating, and soaking the obtained granules in a sulfuric acid solution; pulverizing aluminum oxide and manganese peroxide to obtain superfine powder, and preparing a suspension; soaking the acid soaked granules in the suspension, and then filtering to obtain a filter residue; and mixing the filter residue with chlorophytum comosum juice and microwave treated shaving powder, coupling agent, antioxidant, lubricant and other aids, putting the mixture in a mold, and performing hot pressing treatment to obtain the wood-plastic composite board. The wood-plastic composite board prepared by the invention has a formaldehyde adsorbing effect, can decompose adsorbed formaldehyde, and is green and non-toxic; and the wood-plastic composite board has favorable dimensional stability, corrosion resistance, long service life and wide application prospects.

Description

technical field [0001] The invention relates to a preparation method of formaldehyde adsorption and decomposition wood-plastic composite board, which belongs to the technical field of wood-plastic materials. Background technique [0002] Formaldehyde is a common indoor pollutant. At present, domestic purification methods for formaldehyde have their own deficiencies, such as TiO 2 The catalytic oxidation method must use ultraviolet light; the purification efficiency of the ozone oxidation method is low, and ozone is easy to decompose at the same time; the physical and chemical adsorption methods are limited by the deactivation and regeneration of the adsorbent and the adsorption capacity; The regeneration problem is not well coordinated. However, SekineY and others in Japan found that under the condition of normal temperature and no light, MnO in metal oxides 2 It has a good removal effect on formaldehyde. [0003] A new type of wood-plastic composite material has emerged...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L27/06C08L91/06C08K13/02C08K3/04C08K3/22C08K3/26C08K5/098C08K5/544C08K5/134C08K5/12B01D53/81B01D53/72
CPCB01D53/72B01D53/81C08L97/02C08L2201/08C08L2205/03C08L27/06C08L91/06C08K13/02C08K3/04C08K2003/2227C08K2003/2262C08K2003/265C08K5/098C08K5/544C08K5/1345C08K5/12
Inventor 雷春生徐越
Owner 雷春生
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