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High-toughness PLA/rice hull composite material and preparation method thereof

A composite material and high-toughness technology, which is applied in the field of high-toughness PLA/rice husk composite materials and its preparation, can solve the problems of poor toughness, high production cost, and low crystallinity of polylactic acid, and achieve easy degradation, low cost, and high The effect of toughness

Pending Publication Date: 2022-03-25
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of polylactic acid, such as poor toughness, low crystallinity, poor high temperature resistance, and high production costs, limit its application fields, so the toughening modification of polylactic acid has important practical value

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0024] According to the preparation method of modified PLA of the present invention, preferably comprises:

[0025] Put PLA and GMA into the system for thorough mixing, then add DCP, and carry out reaction blending at 170°C for 8 minutes to obtain modified PLA;

[0026] According to the preparation method of modified rice husk of the present invention, preferably comprising:

[0027] Crush the rice husks into 100-mesh particles, dry the crushed rice husks, soak them in the prepared lye, wash them and dry them at 80°C for 12 hours. Then put the pretreated rice husk into the ethanol solution of silane coupling agent, soak and stir, wash and dry at 80°C for 12 hours after modification;

[0028] According to the present invention, the silane coupling agent is preferably γ-aminopropyltriethoxysilane (KH550), γ-glycidyl etheroxypropyltrimethoxysilane (KH560), γ-methacryloxy One or more of propylpropylsilane (KH570), γ-mercaptopropyltriethoxysilane (KH580), vinyltriethoxysilane (VT...

Embodiment 1

[0034] Preparation of modified PLA:

[0035] First, put 60g PLA and 9gGMA into the system for thorough mixing, then add 0.48gDCP, and carry out reaction blending at 170°C for 8min to obtain modified PLA;

[0036] Preparation of modified rice husk:

[0037] First, crush the rice husks into 100 mesh particles, dry the crushed rice husks and soak them in lye (concentration: 5%). The weight ratio of rice husks to lye is 1:8. The soaking time is 4 hours, and then the rice husk is cleaned. First, wash 5-6 times with clean water to ensure that the surface of the rice husk is clean, and finally rinse it with deionized water. After cleaning, put it into the drying equipment, and set the drying temperature to 80°C, dry for 12 hours. Then put the pretreated rice husk into KH560 ethanol solution (concentration: 3%) for soaking modification treatment, wherein the weight ratio of rice husk to KH560 ethanol solution is 1:8. Stir at the same time, the time is 4 hours, then clean the modifi...

Embodiment 2

[0041] Preparation of modified PLA:

[0042] Same as Example 1.

[0043] Preparation of modified rice husk:

[0044] Same as Example 1.

[0045] Preparation of PLA / rice husk composites:

[0046]Weigh 39.9g of modified PLA resin, 3g of modified rice husk and 17.1g of PBAT for melt blending, the mixing temperature is fixed at 170°C, and the mixing time is 8min to obtain the PLA / rice husk composite material. The measured physical properties of the composite material are listed in Table 1.

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PUM

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Abstract

The invention discloses a high-toughness PLA / rice hull composite material and a preparation method thereof, the high-toughness PLA / rice hull composite material comprises the following components by weight: 35-67% of modified PLA, 50-5% of modified rice hull and 15-29% of PBAT, and the PLA is modified by GMA. The rice hulls are jointly treated by alkali liquor and a silane coupling agent. The PLA / rice hull composite material disclosed by the invention has the advantages of high toughness, low cost and good biodegradability and processability. The composite material can be widely applied to the clothing industry (clothing made by blending wool and cotton can resist wrinkles and maintain the shape), the packaging industry (packaging bags, packaging boxes, disposable fast food boxes and other thin film products and cosmetic bottles, medicine bottles and other packaging containers), the automobile industry (interior plastic, appearance plastic and chassis plastic), the biomedical industry (bone materials, surgical sutures, medical sutures and the like) and the like. The PLA / rice hull composite material prepared by the preparation method disclosed by the invention is simple in preparation method, easy to implement in production process, green and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a high-toughness PLA / rice husk composite material and a preparation method thereof. Background technique [0002] With the progress of society and the development of science and technology, plastic products are more and more widely used in human life, but most of the raw materials of polymer materials are derived from petrochemical resources, which are not renewable. If things go on like this, it will cause an energy crisis, and most polymer materials Due to its stable structure, the material is difficult to degrade in the natural environment, and it is easy to cause environmental pollution. Therefore, the development of biodegradable polymer materials is one of the main ways to solve this dilemma. [0003] Polylactic acid (PLA) is obtained by polymerization of lactic acid, the fermentation product of renewable resources (corn, sugarcane and other crops), a...

Claims

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Application Information

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IPC IPC(8): C08L51/08C08L97/02C08L67/02
CPCC08L51/08C08L97/02C08L67/02
Inventor 任亮甘宏年郭颢张明耀秦宜轩
Owner CHANGCHUN UNIV OF TECH