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Polylactic acid modified material containing plant fibers and preparation method thereof

A technology of modified materials and plant fibers, applied in the field of polylactic acid modified materials, can solve the problems of underutilization of cellulose, and achieve the effects of low density, reduced production cost and high strength

Active Publication Date: 2020-12-04
安徽丰原生物新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, agricultural and forestry wastes such as straws belong to cellulose, but this kind of cellulose has not been fully utilized at present.

Method used

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  • Polylactic acid modified material containing plant fibers and preparation method thereof
  • Polylactic acid modified material containing plant fibers and preparation method thereof
  • Polylactic acid modified material containing plant fibers and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] This embodiment provides a polylactic acid modified material containing plant fibers, and the raw materials for preparing the modified material are composed of the following materials in parts by weight:

[0055]

[0056] Among them, PLLA (L-polylactic acid) has an optical purity of 98.5%, a weight-average molecular weight of 130,000, and a melt flow index of 12.0g / 10min (at 190°C, under a weight pressure of 2.16kg);

[0057] Bamboo powder is passed through a 200 mesh sieve, with an ash content of 0.4%;

[0058] ATBC was purchased from Zibo Shiheng Chemical Co., Ltd.;

[0059] KH550 was purchased from Yizheng Tianyang Chemical Co., Ltd.;

[0060] YS-5031 was purchased from Guangzhou Yuantai Synthetic Materials Co., Ltd.

[0061] The preparation method of this polylactic acid modified material is:

[0062] 1) Dry PLLA at -0.1Mpa, 80°C for 30 minutes; dry bamboo powder at 65°C for 90 minutes;

[0063] 2) The preparation adopts a combination of twin-screw units, spe...

Embodiment 2

[0068] The difference between this embodiment and the embodiment is that the bamboo powder in the embodiment 1 is replaced with wheat straw, and the consumption is unchanged. Other raw materials are all unchanged. The wheat straw is deashed and pulverized, with an ash content of 8.7%, and passed through a 200-mesh sieve. The preparation method refers to the preparation method of Example 1.

Embodiment 3

[0070] The difference between this embodiment and the embodiment is that the PLLA in the embodiment 1 is replaced with PDLA, and the dosage remains unchanged. Other raw materials are all unchanged. Specifically, the properties of PDLA (dextrorotary polylactic acid) are as follows: optical purity 96.5%, weight average molecular weight 112,000, melt flow index 14.2g / 10min (at 190°C, 2.16kg weight pressure).

[0071] During the granulation process, due to the high melting temperature of PDLA, the temperature in each area of ​​unit 1 was raised by 20°C.

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Abstract

The invention belongs to the technical field of high polymer materials, particularly discloses a polylactic acid modified material containing plant fibers, and also discloses a preparation method of the polylactic acid modified material. The modified material is prepared from the following raw materials in parts by weight: 55-70 parts of biodegradable polyester, 30-60 parts of plant fibers, 0.5-10parts of a plasticizer, 0.5-2 parts of a coupling agent and 0.5-2 parts of a compatilizer, wherein the plant fibers are forestry and agricultural residues. The biodegradable polyester particle containing agricultural and forestry waste plant fibers for injection molding is provided by designing the composition of the raw materials and combining the improvement of the preparation process. The problem that the rejection rate of high-content agricultural and forestry waste plant fiber polyester particles in the injection molding production process is too high due to raw materials in the industrial injection molding production process is solved whilepolyester particle degradation requirement is met, and the price of a terminal product can be reduced.

Description

technical field [0001] The invention relates to the technical field of polymer materials, specifically discloses a polylactic acid modified material containing plant fibers, and also discloses a preparation method thereof. Background technique [0002] With the development of science and society, people pay more and more attention to environmental and resource issues. At present, the wide application of plastic materials based on petroleum has caused very serious "white pollution", which has become a global problem. Moreover, petroleum resources are non-renewable, and a large amount of unreasonable use has brought serious resource shortage problems to human beings. The emergence of degradable materials, especially the renewable raw materials of degradable materials, provides an effective means to solve this problem. [0003] Polylactic acid (PLA, also known as polylactide) is the most widely used biodegradable polyester at present, and its usage accounts for about 60% to 7...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L97/02C08K5/11C08K5/544
CPCC08L67/04C08L2201/06C08L97/02C08K5/11C08K5/544
Inventor 冯杰王舒周廷保金齐卞士成
Owner 安徽丰原生物新材料有限公司
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