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Modified wood powder, wood plastic composite material and preparation method and application of wood plastic composite material

A wood-plastic composite material and wood powder technology, which is applied in the field of modified wood powder and wood-plastic composite materials, can solve the problems of wood-plastic materials such as insignificant improvement in mechanical properties, insignificant compatibilization effect, poor compatibility, etc., and achieve improvement Effects of bonding ability, life improvement, and water absorption reduction

Inactive Publication Date: 2017-07-25
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem solved by the present invention is: although the above invention can solve the problem of poor compatibility between wood fiber and plastic interface to a certain extent, there are defects such as many side reactions, low grafting rate, and insignificant compatibilization effect, which lead to wood-plastic The improvement of the mechanical properties of the material is not obvious, and the water resistance needs to be further improved

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  • Modified wood powder, wood plastic composite material and preparation method and application of wood plastic composite material

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preparation example Construction

[0034] In view of the defects such as many by-products, low grafting rate and insignificant compatibilizing effect in the current preparation method of wood-plastic material, the present invention provides a modified wood powder, a composite wood-plastic material and its preparation method and application.

[0035] In a preferred embodiment, the present invention prepares the novel wood-plastic composite material process as follows:

[0036] Put 500g of wood powder into 800ml of NaOH solution with a mass fraction of 15%, and adjust the pH value of the reaction solution to 12; after soaking for 90 minutes, start stirring, heat up to 40-70°C, pass nitrogen to remove the air in the reaction kettle, and then reduce Press until the vacuum degree is -0.1MPa, add metered propylene oxide; adjust the pH value to neutral with glacial acetic acid after the process reaction, filter, wash and filter the lower layer with distilled water at 80°C, and repeat the washing; put the obtained produ...

Embodiment 1

[0057] Put 500g of wood powder into 800ml of NaOH solution with a mass fraction of 15%, and adjust the pH value of the reaction solution to 12; after soaking for 90 minutes, start stirring, heat up to 45°C, pass nitrogen to remove the air in the reaction kettle, and then depressurize To a vacuum of -0.1MPa, add 100g of propylene oxide; after the process reaction, adjust the pH value to neutral with glacial acetic acid, filter, and then wash and filter the lower layer with distilled water at 80°C, and repeat the washing; put the obtained product in a drying oven , dried at 50°C until the quality was constant, and the modified wood powder was obtained.

[0058] Take by weight 70 parts of HDPE, 30 parts of modified wood flour, 0.5 parts of antioxidant, 1 part of anti-ultraviolet agent, 500g in total; wherein, the antioxidant includes 0.25 parts of antioxidant The antioxidant MB of oxygen agent 1035 and 0.25 parts by weight;

[0059] Mix wood powder, HDPE, antioxidant 1035, antio...

Embodiment 2

[0065] Put 500g of wood powder into 800ml of NaOH solution with a mass fraction of 15%, and adjust the pH value of the reaction solution to 12; after soaking for 90 minutes, start stirring, heat up to 45°C, pass nitrogen to remove the air in the reaction kettle, and then depressurize To a vacuum of -0.1MPa, add 100g of propylene oxide; after the process reaction, adjust the pH value to neutral with glacial acetic acid, filter, wash and filter the lower layer with distilled water at 80°C, and repeat the washing; put the obtained product in a drying oven , dried at 50°C to a constant quality to obtain modified wood flour;

[0066] Take by weight 60 parts of HDPE, 40 parts of modified wood powder, 0.5 parts of antioxidant, 1 part of anti-ultraviolet agent, 500g in total; wherein, said antioxidant includes antioxidant 1076 0.25 parts by weight and antioxidant MB0.25 parts by weight;

[0067] Mix wood powder, HDPE, antioxidant 1076, antioxidant MB and anti-ultraviolet agent UVP-36...

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Abstract

The invention relates to modified wood powder, wood plastic composite material and preparation method and application of wood plastic composite material. The modified wood powder is characterized by being prepared from raw materials including the following components: 20-60 parts by weight of alkaline wood powder and 5-10 parts by weight of epoxypropane, wherein the alkaline wood powder is obtained by immersing the wood powder into sodium hydroxide solutions to carry out reaction. The wood plastic composite material is characterized by being prepared from raw materials including the following components: 20-60 parts by weight of modified wood powder and 40-80 parts by weight of high-density polyethylene. According to the modification method, the compatibility of the wood powder and polymer resin is enhanced, the mechanical strength is improved, and the hygroscopicity of materials is reduced; and moreover, the preparation process is simple, the cost is relatively low, and the method has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of wood-plastic materials or wood-plastic materials processing, in particular to modified wood powder, wood-plastic composite materials and their preparation methods and applications. Background technique [0002] With the intensification of contradictions between economic development, energy supply and demand, and ecological environment, people are trying to find a balance between sustainable social and economic development, environmental protection, and resource development. This contradiction is particularly prominent in the field of material development and utilization. In this case, wood-plastic composite materials came into being. The definition of wood-plastic composite material is: "a composite material mainly made of wood or cellulose as the base material and plastic (or a variety of plastics)". Due to its advantages of both wood and plastic, wood-plastic composite materials and their products hav...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L97/02C08K5/37C08K5/372C08K5/3475C08K5/3435
CPCC08L23/06C08L2207/062C08L97/02C08K5/37C08K5/372C08K5/3475C08K5/3435
Inventor 叶同奇徐鹏姚鑫项宁陈鸿哲谢自胜
Owner HEFEI UNIV OF TECH
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