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Method for preparing straw fiber composite material

A technology of straw fiber and composite materials, which is applied in the field of composite fiber materials, can solve the problems of increased hydroxyl content on the fiber surface, difficulty in exerting a reinforcing effect, and reduced fiber strength, and achieves the effects of wide application, simple and reliable preparation method, and excellent performance

Inactive Publication Date: 2015-03-25
镇江奥立特机械制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Straw fiber is added to polyester in order to improve material performance, expand material use, and promote degradation; however, straw fiber is rich in hydroxyl groups and has a smooth surface, which has poor compatibility with polyester and has little meshing effect, making it difficult to exert reinforcement effect
Alkali treatment is an effective means to increase the surface roughness of the fiber and improve the meshing effect between the fiber and the matrix; the hemicellulose and lignin in the fiber can be dissolved by alkali treatment, making the surface of the straw fiber rough and the bond between the fiber and the matrix The meshing effect is enhanced, so that the performance of the composite material is improved, but the alkali treatment increases the hydroxyl content of the fiber surface, and the strength of the fiber itself is greatly reduced, which has an adverse effect on the performance of the composite material; therefore, from the protection of straw fiber strength and improvement of fiber It is of great significance in this field to develop a straw fiber / polybutylene succinate (PBS) composite material and its preparation method starting from two aspects of compatibility with the matrix

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Method for preparing straw fiber composite material
  • Method for preparing straw fiber composite material
  • Method for preparing straw fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] like figure 1 The schematic diagram of the process flow of the preparation method of the straw fiber composite material proposed by the present invention is shown, which mainly includes the following steps:

[0031] 1. Pretreatment of straw fiber:

[0032] 1) Select straw without mildew for mechanical treatment; after crushing and drying, short straw fibers of 100-150um are obtained;

[0033] 2) The straw is treated with water boiling process, the theoretical content of straw fiber is 40%, the mass fraction of NaOH solution is 8%, and it is heated and boiled. After comparison, the fiber content obtained twice in 30 minutes is the highest.

[0034] 3) Washing the separated straw fiber obtained after the boiling treatment to neutrality, and its pH value is 7;

[0035] 2. Mixing of straw fiber:

[0036]The mass fraction of straw fiber after pretreatment is 20%, polybutylene succinate (PBS) is pretreated, and polybutylene succinate (PBS) is placed in a vacuum drying ove...

Embodiment 2

[0041] like figure 1 The schematic diagram of the process flow of the preparation method of the straw fiber composite material proposed by the present invention is shown, which mainly includes the following steps:

[0042] 1. Pretreatment of straw fiber:

[0043] 1) Select straw without mildew for mechanical treatment; after crushing and drying, short straw fibers of 100-150um are obtained;

[0044] 2) The straw is treated with water boiling process, the theoretical content of straw fiber is 40%, the mass fraction of NaOH solution is 8%, and it is heated and boiled. After comparison, the fiber content obtained twice in 30 minutes is the highest.

[0045] 3) Washing the separated straw fiber obtained after the boiling treatment to neutrality, and its pH value is 7;

[0046] 2. Mixing of straw fiber:

[0047] The mass fraction of straw fiber after pretreatment is 25%, and the polybutylene succinate (PBS) is pretreated, and the polybutylene succinate (PBS) is placed in a vacu...

Embodiment 3

[0052] like figure 1 The schematic diagram of the process flow of the preparation method of the straw fiber composite material proposed by the present invention is shown, which mainly includes the following steps:

[0053] 1. Pretreatment of straw fiber:

[0054] 1) Select straw without mildew for mechanical treatment; after crushing and drying, short straw fibers of 100-150um are obtained;

[0055] 2) The straw is treated with water boiling process, the theoretical content of straw fiber is 40%, the mass fraction of NaOH solution is 8%, and it is heated and boiled. After comparison, the fiber content obtained twice in 30 minutes is the highest.

[0056] 3) Washing the separated straw fiber obtained after the boiling treatment to neutrality, and its pH value is 7;

[0057] 2. Mixing of straw fiber:

[0058] The mass fraction of straw fiber after pretreatment is 30%, and the polybutylene succinate (PBS) is pretreated, and the polybutylene succinate (PBS) is placed in a vacu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention provides a method for preparing a straw fiber composite material. The method comprises the following steps: (1) pretreating straw fibers; (2) mixing the straw fibers; (3) performing hot press molding; and (4) packaging the product. The preparation method disclosed by the invention has the advantages that the method is simple, reliable and easy to implement, and the prepared composite material is reproducible and degradable and becomes an environment-friendly and energy-saving ideal material; the material can be recycled, and an industry chain of circular economy can be formed; and the composite material is good in mechanical property, excellent in performance, low in cost and wide in application and can be applied to the fields of industries such as buildings, home furnishing and automobiles.

Description

technical field [0001] The invention relates to the field of composite fiber materials, in particular to a method for preparing straw fiber composite materials. Background technique [0002] With the rapid development of the country's economy, the demand for wood is increasing rapidly. On the one hand, my country is a country with a shortage of wood resources. The per capita forest area is less than 1 / 4 of the world's average level. The situation of wood supply in short supply will exist for a long time. On the one hand, my country is a large agricultural country, which produces about 700 million tons of agricultural straw every year, which is an extremely rich and valuable natural plant fiber resource; rational use of straw resources is important for protecting forest resources, improving the utilization value of crop straws, and preventing environmental pollution. etc. have important practical significance, and this technology is supported and appreciated by the Food and Agr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L97/02C08L5/08C08K5/09C08J5/06C08H7/00
Inventor 祝龙云施爱平李成
Owner 镇江奥立特机械制造有限公司
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