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Preparation method of wood-plastic material coated with modified nano particle wood powder

A technology of nano-particles and wood-plastic materials, which is applied in the field of preparation of wood-plastic materials, can solve the problems of difficult to reduce the preparation cost, poor mechanical properties of products, complicated processes, etc., and achieves long service life, stable structure and simple preparation method. Effect

Inactive Publication Date: 2015-08-12
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this preparation method also obtains wood-plastic materials, there are shortcomings. First, the mechanical properties of the obtained product are not good; Repeated mixing and granulation after cooling make it difficult to reduce the production cost

Method used

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  • Preparation method of wood-plastic material coated with modified nano particle wood powder
  • Preparation method of wood-plastic material coated with modified nano particle wood powder
  • Preparation method of wood-plastic material coated with modified nano particle wood powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The concrete steps of preparation are:

[0029] Step 1, according to the weight ratio of wood flour:tetraethyl orthosilicate is 2.8:12, add 80 mesh wood flour to the tetraethyl orthosilicate with a temperature of 40°C, a pH value of 2.5, and a concentration of 0.3vol%. Stir in ethyl ester aqueous solution for 2 h; wherein, wood powder is wood powder to obtain a mixed solution. According to the weight ratio of silane coupling agent:tetraethyl orthosilicate as 3:40, add silane coupling agent KH550 dropwise to the mixed solution under stirring after 2h, and react for 0.5h after the dropwise addition to obtain Modified wood flour solution.

[0030] Step 2, the modified wood powder solution is first subjected to suction filtration, ethanol washing and drying, to obtain an approximate figure 1 The modified wood powder shown in c. According to the weight ratio of modified wood flour: polypropylene particles is 35:65, mix the two and place them on the screw extruder, and ext...

Embodiment 2

[0032] The concrete steps of preparation are:

[0033]Step 1, according to the weight ratio of wood flour:tetraethyl orthosilicate of 2.9:11, add 85 mesh wood flour to tetraethyl orthosilicate with a temperature of 43°C, a pH value of 2.8, and a concentration of 0.28vol%. Stir in the ethyl ester aqueous solution for 2.3 h; wherein, the wood powder is wood powder to obtain a mixed solution. According to the weight ratio of silane coupling agent:tetraethyl orthosilicate as 3.5:40, add silane coupling agent KH550 dropwise to the stirred mixed solution after 2h, and react for 0.6h after the dropwise addition to obtain Modified wood flour solution.

[0034] Step 2, the modified wood powder solution is first subjected to suction filtration, ethanol washing and drying, to obtain an approximate figure 1 The modified wood powder shown in c. According to the weight ratio of modified wood flour: polypropylene particles is 38:63, the two are mixed and placed on a screw extruder, and ex...

Embodiment 3

[0036] The concrete steps of preparation are:

[0037] Step 1, according to the weight ratio of wood flour:tetraethyl orthosilicate of 3:10, add 90 mesh wood flour to tetraethyl orthosilicate at a temperature of 45°C, a pH value of 3, and a concentration of 0.25vol%. Stir in the ethyl ester aqueous solution for 2.5 h; wherein, the wood powder is wood powder to obtain a mixed solution. According to the weight ratio of silane coupling agent:tetraethyl orthosilicate of 4:40, add silane coupling agent KH550 dropwise to the mixed solution under stirring after 2h, and react for 0.7h after the dropwise addition to obtain Modified wood flour solution.

[0038] Step 2, the modified wood powder solution is first subjected to suction filtration, ethanol washing and drying to obtain the following: figure 1 The modified wood powder shown in c. According to the weight ratio of modified wood flour: polypropylene particles is 40:60, mix the two and put them on the screw extruder, and extru...

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Abstract

The invention discloses a preparation method of a wood-plastic material coated with modified nano particle wood powder. The preparation method comprises the following steps: adding wood powder into a tetraethyl orthosilicate water solution according to a weight ratio of wood powder to tetraethyl orthosilicate of 2.8-3.2:8-12, stirring for two hours to obtain a mixed solution; then dropwise adding a silane coupling agent into the mixed solution under stirring according to a weight ratio of silane coupling agent to tetraethyl orthosilicate of 3-5:40, carrying out reactions for 0.5 hour to obtain a modified wood powder solution; then subjecting the obtained modified wood powder solution to treatments of suction filtration, washing, and drying to obtain modified wood powder; mixing the modified wood powder with polypropylene particles according to a weight ratio of 35-45:55-65, transferring the mixture to a screw extruder, and moulding. The provided wood-plastic material can be used to produce high-performance wood-plastic products having the advantages of high mechanical strength, heat resistance, stable structure, and long service life, and can be widely used in fields such as construction materials, outdoor pavilions, indoor / outdoor floors and furniture, and the like.

Description

technical field [0001] The invention relates to a method for preparing a wood-plastic material made of wood powder, in particular to a method for preparing a wood-plastic material coated with modified nano-particle wood powder. Background technique [0002] Due to the lack of resources and serious environmental pollution in the current society, the use and waste of wood products are strictly restricted by various countries. At the same time, the recycling treatment of fiber materials such as waste wood chips, straw and rice husk powder has also been highly valued and developed to a certain extent. For example, a degradable A preparation method and product of an antifouling wood-plastic material. The preparation method described in this patent application includes the following steps: (1) Prepare the following components by weight ratio: PP / PE powder 100, 150-200 mesh wood flour 30-40, modified starch 20-30, glass fiber 10-40 15, 900-1100 mesh filler 5-8, nano-SiO 2 powder...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L97/02C08K9/06C08K3/36
CPCC08L23/12C08K2201/011C08L97/02C08K9/06C08K3/36
Inventor 叶显柱王化田兴友郑康周海峰苏政田恐虎
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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