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Method for preparing wood-plastic composite material by modified wood chips

A technology of wood-plastic composite materials and wood chips, which is applied in the field of preparation of wood-plastic composite materials from modified wood chips, can solve problems such as insufficient aging resistance, poor toughness, and poor thermal conductivity, and achieve easy process control, simple preparation process, and high thermal conductivity. strong effect

Inactive Publication Date: 2016-05-04
CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem mainly solved by the present invention: Although the currently commonly used wood-plastic materials are environmentally friendly and resource-saving, but still have insufficient aging resistance, poor toughness, poor thermal conductivity and relatively high brittleness, a water-floating Screen wood chips, then pre-mix and react them with tetraethyl silicate at high temperature, then subject them to high-pressure extrusion treatment, and then react with trimethylsilanol and other substances at high temperatures to obtain modified wood chips , and then mix it with raw materials, extrude and granulate, so as to obtain a method for preparing wood-plastic composite materials from modified wood chips

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0026] First, put 700g of sawdust into a container, add water to it to submerge the sawdust by 4cm, stir it with a stirrer for 30 minutes, then let it stand until no sawdust sinks, then remove the impurities floating on the water surface, then filter, collect the filtrate, and press the mass ratio 4:1, mix the filtrate with tetraethyl silicate, then put the mixture into the muffle furnace, use nitrogen protection, set the temperature at 300°C, keep the temperature for 30min; then after the above heat preservation is completed, put the mixture Put it into the extruder, set the extrusion force to 40MN, extrude for 30min, then remove the pressure within 50s, put the obtained extrudate into the pulverizer for crushing, and sieve to obtain 120 mesh powder, and then the obtained Put the powder into the container, add absolute ethanol, glacial acetic acid mixed solution by volume ratio 3:1 therein, soak the powder; then add 30g sorbitan monostearate and 10g trimethylsilanol, then use...

example 2

[0029]First, put 800g of sawdust into a container, add water to it to submerge the sawdust for 5cm, use a stirrer to stir for 35min, then let it stand until no sawdust sinks, then remove the impurities floating on the water surface, then filter, collect the filtrate, according to the mass ratio 4:1, mix the filtrate with tetraethyl silicate, then put the mixture into the muffle furnace, use nitrogen protection, set the temperature at 350°C, keep the temperature for 35min; then after the above heat preservation is completed, put the mixture Put it into an extruder, set the extrusion force to 43MN, extrude for 35min, then remove the pressure within 50s, put the obtained extrudate into a pulverizer for crushing, and sieve to obtain a 120-mesh powder, and then the obtained Put the powder into the container, add dehydrated alcohol, glacial acetic acid mixed solution wherein mixed by volume 3:1, soak the powder; then add 31g sorbitan monostearate and 13g of trimethylsilanol, then us...

example 3

[0032] First, put 900g of sawdust into a container, add water to it to submerge the sawdust for 6cm, stir it with a stirrer for 40 minutes, let it stand until no sawdust sinks, then remove the impurities floating on the water surface, then filter, collect the filtrate, and press the mass ratio 4:1, mix the filtrate with tetraethyl silicate, then put the mixture into the muffle furnace, use nitrogen protection, set the temperature at 400°C, keep the temperature for 40min; then after the above heat preservation is completed, put the mixture Put it into the extruder, set the extrusion force to 45MN, extrude for 40min, then remove the pressure within 50s, put the obtained extrudate into the pulverizer for crushing, sieve to obtain 120 mesh powder, and then Put the powder into the container, add dehydrated ethanol, glacial acetic acid mixed solution mixed by volume ratio 3:1 therein, soak the powder; then add 32g sorbitan monostearate and 15g of trimethylsilanol, then use ethylene ...

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Abstract

The invention discloses a method for preparing a wood-plastic composite material by modified wood chips, belonging to the field of composite materials. The method comprises the steps that screening wood chips by water floating, premixing the screened wood chips with tetraethl silicate for reaction at high temperature, and performing high pressure and extrusion treatment on a mixture, then performing reaction on the mixture and the substances such as trimethylsilanol at high temperature to obtain the modified wood chips, mixing the modified wood chips with raw materials, extruding and pelletizing, so as to obtain the method for preparing the wood-plastic composite material by the modified wood chips. An example proves that the method disclosed by the invention is simple in preparation technology, strong in operability, timber resources are saved by utilizing the wood chips as a raw material, the advantages of a wood-plastic material such as green environmental protection and resources saving are maintained, the prepared wood-plastic composite material has strong aging resistance, good toughness, strong thermal conductivity, is difficult in brittle failure, and suitable for large-scale industrialization promotion.

Description

technical field [0001] The invention discloses a method for preparing wood-plastic composite materials from modified wood chips, which belongs to the field of composite materials. Background technique [0002] Wood-plastic, that is, wood-plastic composite material, is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride to replace the usual resin adhesive, and more than 35% to 70% of the Wood flour, rice husk, straw and other waste plant fibers are mixed into new wood materials, and then processed by extrusion, molding, injection molding and other plastic processing techniques to produce boards or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. Wood-plastic materials are more and more concerned and valued by people because of their environmental protection and energy saving. [0003] However, the current wood-pla...

Claims

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Application Information

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IPC IPC(8): C08L77/00C08L23/06C08L69/00C08L97/02C08L31/04C08L83/04C08H8/00
CPCC08L77/00C08H8/00C08L23/06C08L69/00C08L97/02C08L2205/035C08L31/04C08L83/04
Inventor 高玉梅张帆宋国
Owner CHANGZHOU YAHUAN ENVIRONMENTAL PROTECTION TECH
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