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Wood-plastic composite material and preparation method thereof

A wood-plastic composite material and its formulation technology, which is applied in the field of wood-plastic composite material and its preparation, can solve the problems of harsh processing conditions, the limitation of fiber addition and material performance improvement, difficult dispersion of plant fibers, etc., and achieve the goal of equipment and molding The effect of low mold requirements, easy control of production costs, and strong process designability

Inactive Publication Date: 2011-06-15
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] (1) It is prepared by melting processing method, the processing temperature is high, the plant fibers in it are easy to oxidize and decompose, and the processing conditions are harsh;
[0004] (2) The thermoplastic resin has a high melt viscosity, the plant fiber is not easy to disperse, and the resin has poor lubricity to the fiber, so the amount of fiber added and the improvement of material properties are greatly limited;
[0005] (3) Forming under high temperature and high pressure, which consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Weigh 360g of 250-mesh poplar wood flour, add 3.6g of maleic anhydride and stir in a high-speed mixer for 5 minutes to prepare activated wood flour for subsequent use; (2) Weigh 20g of commercially available DC191 resin, styrene 20g, add 0.2g cyclohexanone peroxide and 0.04g cobalt octoate into a high-speed stirring tank and mix evenly; (3) quickly put the material obtained in (2) into a kneader and fully knead and knead with the activated wood powder obtained in (1) Obtain a uniformly mixed material; (4) Add the material obtained in (3) into a molding mold and cure it at room temperature for 1 week under a pressure of 20 MPa to obtain the desired wood-plastic composite product.

Embodiment 2

[0065] (1) Take 120g of 50 purpose bamboo powder, add 0.6g of acrylic acid and stir in a high-speed mixer for 5 minutes to prepare activated bamboo powder for subsequent use; (2) Take by weighing 252g of commercially available DC196 resin, styrene 28g, and 0.28g Dicumyl peroxide, 0.28g cobalt naphthenate and the activated bamboo powder of (1) gained add in the kneader and mix evenly; (3) join the material of (2) gained in the forming mold at 170 ℃, Press down and solidify for 10 minutes to obtain the desired wood-plastic composite product.

Embodiment 3

[0067] (1) Weigh 200g of 100-mesh bran powder, add 3g of methacrylic acid and stir in a high-speed mixer for 5 minutes to prepare activated bran powder for later use; (2) Weigh 50g of 100-mesh glass fiber powder, add 0.25g of silane coupling agent (KH550) stirred in a high-speed mixer for 5 minutes to prepare activated glass fiber powder for subsequent use; (3) take commercially available 298 resin 90g, acrylate 60g, benzoyl peroxide 1g, cobalt octanoate 0.03g and (1 ) The activated bran powder obtained in (2) and the activated glass fiber powder obtained in (2) are added to a kneader and kneaded evenly at room temperature; After curing for 60 minutes, demould to obtain the desired wood-plastic composite product.

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PUM

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Abstract

The invention discloses a wood-plastic composite material which comprises an unsaturated polyester resin system and activated plant fiber powder, wherein based on the unsaturated polyester resin system and activated plant fiber powder, the percentage by mass of the unsaturated polyester resin system is 10-70%, and the percentage by mass of the activated plant fiber powder is 30-90%; the unsaturated polyester resin system comprises unsaturated polyester resin, crosslinking monomer, initiator and promoter; and the activated plant fiber powder comprises plant fiber powder and surfactant. The invention also discloses a preparation method of the wood-plastic composite material. By using the unsaturated polyester as the substrate, the wood-plastic composite material can be molded at normal temperature and normal pressure, has low requirements for equipment and molds, and can be machined into various types of products as required; and the production cost is easy to control.

Description

1. Technical field [0001] The invention relates to a wood-plastic composite material and a preparation method thereof, in particular to a preparation method of an unsaturated polyester-based wood-plastic composite material. 2. Background technology [0002] Wood-plastic composite material is a kind of wood-like performance and appearance prepared from agricultural and forestry waste (plant fiber) and plastic as the main raw materials. It can replace natural wood as a green and environmentally friendly material. Research and production of wood-plastic composite materials at home and abroad A large number of papers and patent reports can be seen, but it mainly uses general-purpose thermoplastics (such as polyethylene, polypropylene, polyvinyl chloride, polystyrene, etc.) as the resin matrix, and is formed by extrusion, injection or pressing. Such wood-plastic composite materials have the following disadvantages: [0003] (1) It is prepared by melting processing method, the pr...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L51/08C08F283/01
Inventor 宋艳江羊海棠王宝云
Owner HANGZHOU NORMAL UNIVERSITY