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Preparation method of reinforced straw fiber composite material

A technology for straw fibers and composite materials, 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, decreased fiber strength, etc., and achieves the effects of wide application, simple and reliable preparation method, and excellent performance.

Inactive Publication Date: 2015-04-01
JIANGSU UNIV +1
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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

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  • Preparation method of reinforced straw fiber composite material
  • Preparation method of reinforced straw fiber composite material
  • Preparation method of reinforced straw fiber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Such as figure 2 The schematic diagram of the process flow of the preparation method of the reinforced straw fiber composite material proposed by the present invention is shown, which mainly includes the following steps:

[0037] 1. Pretreatment of straw fiber:

[0038] 1) Select straw without mildew for mechanical treatment; after crushing and drying, short straw fibers with a width of 100-150 um are obtained;

[0039] 2) The straw is treated by microwave technology; the straw is immersed in a NaOH solution with a mass fraction of 3%, wherein the theoretical content of straw fiber is 40%, and microwaves are used to continuously irradiate for 20 minutes to obtain the straw fiber after microwave treatment;

[0040] 3) Washing the separated straw fiber obtained after the boiling treatment to neutrality, and its pH value is 7;

[0041] 2. Modification of straw fiber:

[0042] The modified agent used is stearic acid with a concentration of 10%. The fiber is treated at 8...

Embodiment 2

[0048] Such as figure 2 The schematic diagram of the process flow of the preparation method of the reinforced straw fiber composite material proposed by the present invention is shown, which mainly includes the following steps:

[0049] 1. Pretreatment of straw fiber:

[0050] 1) Select straw without mildew for mechanical treatment; after crushing and drying, short straw fibers with a width of 100-150 um are obtained;

[0051] 2) The straw is treated by microwave technology; the straw is immersed in a NaOH solution with a mass fraction of 3%, wherein the theoretical content of straw fiber is 40%, and microwaves are used to continuously irradiate for 20 minutes to obtain the straw fiber after microwave treatment;

[0052] 3) Washing the separated straw fiber obtained after the boiling treatment to neutrality, and its pH value is 7;

[0053] 2. Modification of straw fiber:

[0054] The modifier used is stearic acid, the concentration of which is 10%. The fiber is treated at ...

Embodiment 3

[0060] Such as figure 2 The schematic diagram of the process flow of the preparation method of the reinforced straw fiber composite material proposed by the present invention is shown, which mainly includes the following steps:

[0061] 1. Pretreatment of straw fiber:

[0062] 1) Select straw without mildew for mechanical treatment; after crushing and drying, short straw fibers with a width of 100-150 um are obtained;

[0063] 2) The straw is treated by microwave technology; the straw is immersed in a NaOH solution with a mass fraction of 3%, wherein the theoretical content of straw fiber is 40%, and microwaves are used to continuously irradiate for 20 minutes to obtain the straw fiber after microwave treatment;

[0064] 3) Washing the separated straw fiber obtained after the boiling treatment to neutrality, and its pH value is 7;

[0065] 2. Modification of straw fiber:

[0066] The modifier used is stearic acid, the concentration of which is 10%. The fiber is treated at ...

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Abstract

The invention provides a preparation method of a reinforced straw fiber composite material. The preparation method comprises the following steps: 1) pre-processing straw fibers; 2) modifying the straw fibers; 3) mixing the straw fibers; 4) thermally pressing and molding; and 5) packaging products. The preparation method disclosed by the invention has the advantages of being simple, reliable, and easy to implement; the prepared composite material is high in utilization rate of straw fibers, can be regenerated and degraded to become an environment-friendly and energy-saving ideal material, and is recycled, so that an industrial chain of circular economy is formed. The reinforced straw fiber composite material is good in mechanical performance, excellent in performance, low in cost, wide in use, and capable of being used to the industry fields such as buildings, home furnishing and cars.

Description

technical field [0001] The invention relates to the field of composite fiber materials, in particular to a method for preparing reinforced 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 also 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 ...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L67/02B29C43/58B27K9/00
CPCY02P20/10
Inventor 施爱平李成祝龙云叶丽华
Owner JIANGSU UNIV
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