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Composite material and preparation method thereof

A composite material and formula technology, applied in the field of polylactic acid and straw fiber composite material and its preparation, can solve the problems of high density and non-degradability, and achieve the effect of low density, easy operation and increased specific surface area

Inactive Publication Date: 2010-08-04
CHERY AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are a variety of composite materials in the prior art, and composite materials are generally used in automobiles and other products. Polylactic acid (PLA) composite materials are one of them, which have the disadvantages of high density and non-degradable properties

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Weigh raw materials (kg) according to the following weights:

[0038] Polylactic acid: 45, rice straw fiber powder: 40, silane coupling agent KH-550: 5, TPP: 2, 1010: 1, 168: 2, EBS: 2, white mineral oil: 3.

[0039] The preparation method is as follows:

[0040] (1) pulverizing the rice straw to obtain 40 kilograms of rice straw fiber powder, the particle diameter of the rice straw fiber powder is 100 mesh;

[0041] (2) Add 5 kg of silane coupling agent KH-550 to the rice straw fiber powder to fully stir and mix, stir for 300 seconds, and dry the mixture at 80°C for 2 hours to obtain modified rice straw straw fiber powder;

[0042] (3) Put 40 kilograms of polylactic acid, modified rice straw fiber powder, 2 kilograms of TPP, 1 kilogram of 1010, 2 kilograms of 168, 2 kilograms of EBS and 3 kilograms of white mineral oil in a high-speed mixer at room temperature at 1500 rpm Mix for 300 seconds, and the friction temperature rise shall not be higher than 80°C;

[0043]...

Embodiment 2

[0045] Weigh raw materials (kg) according to the following weights:

[0046] Polylactic acid: 94.4, wheat straw fiber powder: 5, benzhydryl titanate 0.1, bistriethoxytrisilane tetrasulfide 0.1, 1010: 0.2, paraffin wax: 0.2.

[0047] The preparation method is as follows:

[0048] (1) Wheat straw is pulverized to obtain 5 kilograms of wheat straw fiber powder, and the particle diameter of wheat straw fiber powder is 1000 mesh;

[0049] (2) Add 0.1 kg of benzhydryl titanate and 0.1 kg of bistriethoxytrisilane tetrasulfide to the wheat straw fiber powder, fully stir and mix, stir for 400 seconds, and bake the mixture at 100°C Drying, drying time is 1 hour, obtains modified wheat straw fiber powder;

[0050] (3) Put 94.4 kilograms of polylactic acid, modified wheat straw fiber powder, 0.2 kilograms of 1010 and 0.2 kilograms in a high-speed mixer, mix at room temperature for 50 seconds at a speed of 2000 rpm, and the friction temperature rise must not be higher than 80 ° C;

[00...

Embodiment 3

[0053] Weigh raw materials (kg) according to the following weights:

[0054] Polylactic acid: 75, corn straw fiber powder: 15, sugarcane stalk fiber powder 5, titanate coupling agent HW-102: 2, diphenyl phosphite: 1, hindered phenol: 0.2, TPP: 0.3, hard Calcium fatty acid: 0.5, white mineral oil: 1.

[0055] The preparation method is as follows:

[0056] (1) Pulverizing the corn stalks to obtain 15 kg of corn straw fiber powder, the particle diameter of the corn straw fiber powder is 1500 mesh; pulverizing the sugarcane stalks to obtain 5 kg of sugarcane stalk fiber powder, the particle diameter of the sugarcane stalk fiber powder is 1200 mesh;

[0057] (2) Add 2 kg of titanate coupling agent HW-102 to the grain straw fiber powder and sugarcane stalk fiber powder to fully stir and mix, stir for 400 seconds, and dry the mixture at 60°C. For 2.5 hours, the modified straw fiber powder was obtained;

[0058] (3) Put 75 kg of polylactic acid, modified straw fiber powder, 1 kg of d...

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Abstract

The invention discloses a composite material, the formula of the composite material consists of polylactic acid, straw fiber powder, a coupling agent, a heat stabilizer and a processing aid, wherein the polylactic acid is taken as a substrate, and the straw fiber is taken as a reinforcing agent; the modification is carried out on the surface of the straw fiber, thereby improving the compatibility with the substrate; and then the composite material of the polylactic acid and the straw fiber is manufactured by co-blending, melt extrusion, granulation and other processing technologies. The composite material has the advantages of low density and capability of being degraded completely.

Description

technical field [0001] The invention belongs to the field of polymer materials, and discloses a polylactic acid and straw fiber composite material and a preparation method thereof. Background technique [0002] In today's increasingly scarce natural resources, it is a research hotspot in today's society to make full use of the potential of biological material resources, to develop the unique functions and characteristics of biological materials, and to develop new application fields. There are a variety of composite materials in the prior art, and composite materials are generally used in products such as automobiles. Polylactic acid (PLA) composite materials are one of them, which have the disadvantages of high density and non-degradable properties. Contents of the invention [0003] The purpose of the embodiments of the present invention is to provide a fully regenerated and fully degradable high-performance lightweight composite material with a low density and can be co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02B29B9/06B29C47/92B29C48/92
CPCB29C48/04
Inventor 唐少俊
Owner CHERY AUTOMOBILE CO LTD
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