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Preparation method of weather-resistant bamboo-plastic composite material

A composite material and weather-resistant technology, applied in the field of bamboo-plastic materials, can solve the problems of easy aging, fading and weather-resistant properties of bamboo-plastic composite materials, and achieve the effects of modifying weather resistance, inhibiting thermal decomposition, and improving mechanical properties.

Inactive Publication Date: 2018-09-21
翟琳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: Aiming at the problems that bamboo-plastic composite materials are prone to aging and fading and have poor weather resistance, a preparation method of weather-resistant bamboo-plastic composite materials is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Take moso bamboo and wash and dry, airflow crushing and grinding through a 200 mesh sieve to obtain ground powder and place it at 35°C and dry to a moisture content of 20% to obtain dry bamboo powder, then dry bamboo powder at a mass ratio of 1:1. Powder and 10% mass fraction of silane coupling agent KH-550 ethanol solution were placed at 100°C and stirred and mixed for 10 minutes, left to stand and cooled to room temperature to obtain modified bamboo powder and vacuum freeze-dried to obtain dry modified bamboo powder; according to the mass ratio 1:10, add tetraethyl orthosilicate to absolute ethanol, stir and mix to obtain the base liquid, put the base liquid in the Erlenmeyer flask, add 1% hydrochloric acid dropwise to the base liquid, and control the rate of hydrochloric acid dripping 2mL / min. After the dropwise addition is completed, keep the temperature at 45°C for 25 minutes, let it cool down to room temperature, and obtain a modified gel solution; mix soybean prot...

example 2

[0020] Take moso bamboo and wash and dry, airflow crushing and grinding through a 200 mesh sieve to obtain ground powder and place it at 37° C. Powder and 10% mass fraction of silane coupling agent KH-550 ethanol solution were placed at 100°C and stirred for 12 minutes, left to cool to room temperature to obtain modified bamboo powder and vacuum freeze-dried to obtain dry modified bamboo powder; according to the mass ratio 1:10, add tetraethyl orthosilicate to absolute ethanol, stir and mix to obtain the base liquid, put the base liquid in the Erlenmeyer flask, add 1% hydrochloric acid dropwise to the base liquid, and control the rate of hydrochloric acid dripping 2mL / min. After the dropwise addition is completed, keep the temperature at 47°C for 27 minutes, let it cool down to room temperature, and obtain a modified gel solution; stir and mix soybean protein and deionized water at a mass ratio of 1:10. Adjust the pH to 6.2 with glacial acetic acid to obtain a mixed solution. ...

example 3

[0022]Take moso bamboo and wash and dry, airflow crush and grind through a 200 mesh sieve to obtain ground powder and place it at 40°C and dry to a moisture content of 20% to obtain dry bamboo powder, and then dry bamboo powder at a mass ratio of 1:1. Powder and 10% mass fraction of silane coupling agent KH-550 ethanol solution were placed at 100°C and stirred for 15 minutes, left to cool to room temperature to obtain modified bamboo powder and vacuum freeze-dried to obtain dry modified bamboo powder; according to the mass ratio 1:10, add tetraethyl orthosilicate to absolute ethanol, stir and mix to obtain the base liquid, put the base liquid in the Erlenmeyer flask, add 1% hydrochloric acid dropwise to the base liquid, and control the rate of hydrochloric acid dripping 2mL / min, after the dropwise addition is completed, keep warm at 55°C for 30 minutes, let stand and cool to room temperature to obtain a modified gel solution; mix soybean protein with deionized water at a mass r...

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Abstract

The invention relates to a preparation method of a weather-resistant bamboo-plastic composite material, and belongs to the technical field of bamboo-plastic materials. The method comprises the steps that ethyl orthosilicate is hydrolyzed to form a sol to coat the surface of a bamboo powder material, so that surface grooves of the bamboo powder material are gradually filled with a coating, shallowgrooves are filled to be leveled, thereby effectively reducing the contact area and contact time between the surface of the bamboo powder material and oxygen., and the sol formed by coating is dried to form a shell due to the loss of moisture of the sol and the volatilization of partial substances in gel, thereby effectively improving the mechanical properties of the material; the modification isachieved through the hydrolysis and coating of the ethyl orthosilicate, the effective load of silica sol on the surface of the bamboo powder material is effectively combined with polyvinyl chloride, amorphous regions of a polyvinyl chloride polymer chain are filled with inorganic silica particles, so that the heat transfer is reduced, the thermal decomposition of the polymer chain is inhibited toa certain extent, thereby effectively improving the heat-resistant oxygen aging property of the bamboo-plastic composite material, and further modifying the weather resistance of the bamboo-plastic composite material.

Description

technical field [0001] The invention relates to a preparation method of a weather-resistant bamboo-plastic composite material, which belongs to the technical field of bamboo-plastic materials. Background technique [0002] Wood-plastic composite materials (based on plant fibers (such as wood powder, bamboo powder, sugar cane and other agricultural and forestry wastes) and thermoplastics (such as, ,,,, etc.) as the main raw materials, plus a small amount of additives, additives, through extrusion, injection molding, A composite material made by molding methods such as molding. Its products can be used to replace natural wood or bamboo for the production of furniture, indoor and outdoor decoration materials, and building materials. Since wood-plastic composite materials have to go through morning and evening, The influence of temperature difference in spring, summer, autumn and winter, outdoor use also has to withstand long-term sun and rain and bear different external loads, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C08L89/00C08L97/02C08K13/02C08K3/26C08K3/34C08K3/36
CPCC08K2003/265C08K2201/011C08L27/06C08L2201/08C08L2205/03C08L2205/16C08L89/00C08L97/02C08K13/02C08K3/26C08K3/34C08K3/36
Inventor 谷友宝蒋益
Owner 翟琳
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