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Preparation method of bio-based composite material

A composite material, bio-based technology, applied in the field of composite materials, can solve the problems of high energy consumption, unfriendly environment, non-degradation, etc., and achieve the effects of simple preparation process, environmental friendliness and low cost

Inactive Publication Date: 2015-03-11
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of bio-based composite materials to overcome the defects of traditional petrochemical materials such as high energy consumption, non-degradation, and unfriendly environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Crush wheat straw, sort out fiber bundles of 30-60 meshes, and process them through high-temperature hot water treatment to obtain plant fiber raw materials, and control their moisture content to 7%.

[0021] (2) Weigh the raw materials according to the following mass ratio, the plant fiber raw material prepared in step (1): starch: silane coupling agent KH570=35:50:1.5.

[0022] (3) The raw materials weighed in the step (2) are uniformly mixed to obtain a reaction mixture material, which is molded to obtain a bio-based composite material.

[0023] The bio-based composite material prepared in this example has good mechanical properties, its tensile strength is 17~24MPa, its elongation at break is 50~70%, its bending strength is 15~20MPa, and its notched impact strength is 14~18kJ / m 2 .

Embodiment 2

[0025] (1) Crush the cotton stalks, sort out 40-80 mesh fiber bundles, and process them by steam explosion to obtain plant fiber raw materials, and control the moisture content to 7.5%.

[0026] (2) Weigh the raw materials according to the following mass ratio, the plant fiber raw material prepared in step (1): agar: silane coupling agent KH550=50:72:2.5.

[0027] (3) The raw materials weighed in the step (2) are uniformly mixed to obtain a reaction mixture material, which is molded to obtain a bio-based composite material.

[0028] The bio-based composite material prepared in this example has good mechanical properties, its tensile strength is 19~27MPa, its elongation at break is 40~60%, its bending strength is 17~23MPa, and its notched impact strength is 15~20kJ / m 2 .

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Abstract

The invention discloses a preparation method of a bio-based composite material. The preparation method comprises the following steps: pulverizing plant fibers, separating out 20-100-mesh fiber bundles, treating by a hot water process or steam explosion process to obtain a plant fiber raw material, wherein the water content is controlled at less than 8%; weighing the following raw materials in parts by mass: 30-60 parts of plant fiber raw material, 40-80 parts of natural high-polymer adhesive and 1-4 parts of additive; and uniformly mixing the weighed raw materials to obtain a reaction mixture, and carrying out die pressing or injection molding to obtain the bio-based composite material. The method has the advantages of simple preparation technique, wide raw material sources and low cost, and implements waste utilization; and the prepared bio-based composite material has the advantages of high strength, natural surface texture, bright color, novel tactile sensation, environment friendliness and the like, and is suitable for reuse.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a preparation method of bio-based composite materials. Background technique [0002] At present, a large amount of plastic waste is non-degradable waste, which causes serious public hazards to the ecological environment and endangers people's health. The annual plastic waste in my country is about 9.068 million tons (2005 data), and disposable plastic product waste accounts for 5% of about 45%. tons. [0003] The raw materials for most synthetic polymers are petroleum and coal, but the total oil reserves in the world are only more than 80 billion cubic meters at present, and more than 3 billion cubic meters are consumed every year. It is estimated that within a few decades, the petroleum resources on the earth will be exhausted Although there are more coal reserves, it will take less than a hundred years. More than 200 million tons of plastics are synthesized from pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L5/00C08L5/08C08L5/12C08L97/02
Inventor 李静静凌敏曾柏顺徐旭黄超
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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