A method for preparing high-strength wood-plastic material

A wood-plastic material, high-strength technology, applied in the field of natural polymer chemistry, can solve the problems of raw material modification and cumbersome mixing process, and achieve the effects of short production cycle, low cost and high bonding strength

Active Publication Date: 2021-12-14
FUJIAN AGRI & FORESTRY UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The current research focus is still on improving interfacial compatibility, but the modification of raw materials and the mixing process are relatively cumbersome, and there is no report on the performance enhancement of wood-plastic composites without adding coupling agents.

Method used

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  • A method for preparing high-strength wood-plastic material
  • A method for preparing high-strength wood-plastic material
  • A method for preparing high-strength wood-plastic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 5 grams of larch wood powder (20-500 mesh) to 100 grams of p-toluenesulfonic acid solution with a concentration of 80wt% preheated to 80°C, stir at a speed of 200rad / min for 20 minutes, and filter with suction to obtain high hydrophobicity and high fiber The modified wood powder of Subi was dried overnight at 100°C. The dried hydrophobically modified wood flour and high-density polyethylene were mixed and stirred evenly at a mass ratio of 1:1, then hot extruded at 160°C, and injection molded into splines. The obtained high-strength lignin material has a tensile strength of over 34MPa, a bending strength of over 50MPa, and good mechanical properties.

Embodiment 2

[0026] Add 5 grams of larch wood powder (20-500 mesh) to 25 grams of p-toluenesulfonic acid solution with a concentration of 50wt% preheated to 50°C, stir at a speed of 50rad / min for 5 minutes, and filter with suction to obtain a highly hydrophobic and high-fiber The modified wood powder of Subi was dried overnight at 100°C. The dried hydrophobically modified wood flour and high-density polyethylene were mixed and stirred evenly at a mass ratio of 1:9, then hot-extruded at 160°C, and injection-molded into splines. The tensile strength is over 25MPa, the bending strength is over 30MPa, and a high-strength lignin material is obtained.

Embodiment 3

[0028] Add 5 grams of larch wood powder (20-100 mesh) to 250 grams of p-toluenesulfonic acid solution with a concentration of 85wt% preheated to 90°C, stir at a speed of 2000rad / min for 100 minutes, and filter with suction to obtain a highly hydrophobic and high-fiber The modified wood powder of Subi was dried overnight at 100°C. Mix the dried hydrophobically modified wood flour and high-density polyethylene with a mass ratio of 1:1, and then heat extrude at 160°C and injection mold into splines. The tensile strength is above 30MPa, and the bending strength is above 40MPa.

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Abstract

The invention discloses a method for preparing a high-strength wood-plastic material. The wood powder is passed through a recyclable reagent and stirred and reacted in a heated state to obtain a modified wood powder with certain hydrophobicity (the contact angle can reach 135 degrees); Mix the modified wood flour with high-density polyethylene in proportion, stir well, extrude hot, and beat into splines. The invention obtains a high-strength wood-plastic material through a simple process, which has good mechanical properties, high interface bonding strength, high degradability, high environmental protection, and can be widely used in furniture, industry, construction and other industries.

Description

technical field [0001] The invention belongs to the technical field of natural polymer chemistry, and in particular relates to a method for preparing high-strength wood-plastic materials. Background technique [0002] Currently, renewable raw materials and environmentally friendly and sustainable methods and processes are the current trends in science and technology (Tilman, D.; Socolow, R. et al. science 2009 , 325, 270-271.). It is imminent to solve the problems of insufficient wood supply and disposal of plastic waste, and wood-plastic composite materials have emerged as the times require. Compared with raw plastic and raw wood, the mechanical properties of wood-plastic composites prepared from waste plastics, residual wood powder and wood chips, and wood powder extracted from waste furniture are superior to single raw wood and single raw plastic. With its excellent mechanical properties, wood-plastic composite materials have been widely used in construction materials,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08L23/06C08H8/00
Inventor 杨文斌林慧萍林玲陈晶冰李燃
Owner FUJIAN AGRI & FORESTRY UNIV
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