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High-performance wood-plastic composite material and preparation method thereof

A wood-plastic composite material, high-performance technology, applied in the field of wood-plastic composite material and its preparation, can solve the problems of weak interfacial interaction force, low mechanical strength, easy aging, etc., and achieve the effect of high internal fiber density

Active Publication Date: 2022-01-28
GUIZHOU MATERIAL IND TECH INSTITUE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the poor compatibility between thermoplastics and plant fibers and the weak interfacial interaction force, resulting in relatively low mechanical strength, easy aging, short service life and other shortcomings, it needs to be chemically modified
Since plant fibers contain cellulose, hemicellulose, and lignin, when lye is used to treat plant fibers, lye can dissolve some low-molecular impurities such as pectin, lignin, and hemicellulose in wood, resulting in There are many defects such as voids inside, which will affect its reinforcing effect on thermoplastics

Method used

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  • High-performance wood-plastic composite material and preparation method thereof

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Comparison scheme
Effect test

Embodiment 1

[0023] A high-performance wood-plastic composite material, comprising the following raw materials, the parts by weight of each component are as follows: 100 parts of thermoplastic polypropylene, based on the weight of thermoplastics, 80 parts of modified sisal fiber, 8 parts of PP-GMA, stearic acid 8 parts, 1 part of antioxidant 1010, 2 parts of antioxidant 168, 30 parts of aluminum hydroxide, 3 parts of SHT-115.

[0024] The preparation method comprises the following steps:

[0025] Plant fiber modification treatment: After the sisal fiber is preliminarily combed by a carding machine to remove surface impurities, 1000g of sisal fiber is put into 3000g of NaOH and NaOH 2 SO 3 The mixed boiling aqueous solution was continuously treated for 3 hours, wherein the concentration of NaOH was 2.5mol / L, Na 2 SO 3 The concentration is 0.4mol / L. Then use clean water to wash the treated sisal long fibers repeatedly for many times, and then press the treated sisal fibers through a mold...

Embodiment 2

[0035] A high-performance wood-plastic composite material, comprising the following raw materials, the parts by weight of each component are as follows: 100 parts of thermoplastic polypropylene, based on the weight of thermoplastics, 80 parts of modified sisal fiber, 8 parts of PP-GMA, stearic acid 8 parts, 1 part of antioxidant 1010, 2 parts of antioxidant 168, 30 parts of aluminum hydroxide, 3 parts of SHT-115.

[0036] The preparation method comprises the following steps:

[0037] Plant fiber modification treatment: After the sisal fiber is preliminarily combed by a carding machine to remove surface impurities, 1000g of sisal fiber is put into 3000g of NaOH and NaOH 2 SO 3 The mixed boiling aqueous solution was continuously treated for 3 hours, wherein the concentration of NaOH was 2.5mol / L, Na 2 SO 3 The concentration is 0.6mol / L. Then use clean water to wash the treated sisal long fibers repeatedly for many times, and then press the treated sisal fibers through a mold...

Embodiment 3

[0041] A high-performance wood-plastic composite material, comprising the following raw materials, the parts by weight of each component are as follows: 100 parts of thermoplastic polypropylene, based on the weight of thermoplastics, 80 parts of modified flax fiber, 8 parts of PP-GMA, and 8 parts of stearic acid 1 part, 1 part of antioxidant 1010, 2 parts of antioxidant 168, 30 parts of aluminum hydroxide, 3 parts of SHT-115.

[0042] The preparation method comprises the following steps:

[0043] Plant fiber modification treatment: After the flax fiber is preliminarily combed by a carding machine to remove surface impurities, 1000g of flax fiber is put into 3000g of NaOH and NaOH 2 SO 3 The mixed boiling aqueous solution was continuously treated for 3 hours, wherein the concentration of NaOH was 2.5mol / L, Na 2 SO 3 The concentration is 0.4mol / L. Then use clear water to wash the treated flax long fibers repeatedly for several times, and then press the treated flax fiber thr...

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Abstract

The invention provides a high-performance wood-plastic composite material and a preparation method thereof, wherein the high-performance wood-plastic composite material comprises the following raw materials and components in parts by weight: 100 parts of thermoplastic plastic, and 30-100 parts of modified plant fibers, 1-10 parts of a compatilizer, 1-8 parts of a lubricant, 0.3-5 parts of an antioxidant, 5-40 parts of a flame retardant and 0.5-5 parts of an antibacterial agent according to the weight of the thermoplastic plastic. The preparation method comprises the steps of plant fiber modification treatment, high-speed mixing, extrusion molding, water cooling shaping and traction, and obtaining the wood-plastic composite material. The obtained wood-plastic composite material has good tensile strength, impact strength and other properties, is low in cost and is suitable for industrial production.

Description

【Technical field】 [0001] The invention relates to a preparation method of a polymer composite material, in particular to a wood-plastic composite material and a preparation method thereof. 【Background technique】 [0002] Plant fiber material is a kind of natural polymer material and an inexhaustible resource. It has the advantages of low price, low density, high elastic modulus, biodegradability and renewability. With the development of urbanization and industrialization, in order to meet the requirements of environmental protection, some waste fibers such as straw, straw, corn stalks and other waste fibers have been used to prepare wood-plastic composite materials in recent years. Wood-plastic composite materials are made by mixing plant fibers such as wood powder, rice husk powder, straw powder, and hemp fiber with plastics such as polyethylene, polypropylene, and polyvinyl chloride, and then adding appropriate functional additives to mix evenly, and then extruding The wo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/06C08L97/02C08K3/22
CPCC08L23/12C08L23/06C08K2003/2227C08L97/02C08K3/22
Inventor 孙静黄安荣罗珊珊石敏罗恒
Owner GUIZHOU MATERIAL IND TECH INSTITUE
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