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A kind of fully bio-based degradable polylactic acid composite material and preparation method thereof

A composite material, polylactic acid technology, applied in the field of fully biodegradable polylactic acid-based composite materials and its preparation, can solve the problems of high epoxy vegetable oil addition, sacrifice high strength and high modulus of polylactic acid, and achieve excellent Effects of biodegradability and processability improvement

Active Publication Date: 2016-07-06
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of epoxy vegetable oil is relatively high, and it is a flexible small molecule, which greatly sacrifices the high strength and high modulus of polylactic acid.

Method used

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  • A kind of fully bio-based degradable polylactic acid composite material and preparation method thereof
  • A kind of fully bio-based degradable polylactic acid composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Weigh the following ingredients by weight:

[0042] Polylactic acid (4032D of American Natureworks) 79Kg, cornstarch (Zhucheng Xingmao Corn Development Co., Ltd.) 20Kg, epoxy furan (Hebei Two Bran International Trade Co., Ltd.) 1Kg.

[0043] The preparation method of polylactic acid / starch composite material:

[0044] First, add 79Kg of polylactic acid and 20Kg of cornstarch into a high-speed mixer, dry at 105°C for 30 minutes, then add 1kg of epoxy furan to obtain a mixed material; then add the mixed material to a twin-screw extruder for melting After blending (screw temperature is 170°C-180°C), stranding, air cooling, and pelletizing are carried out to obtain granular composite material resin. The selected twin-screw extruder has a screw length-to-diameter ratio of 40:1.

Embodiment 2

[0046] Weigh the following ingredients by weight:

[0047] Polylactic acid (4032D of American Natureworks) 67Kg, cornstarch (Zhucheng Xingmao Corn Development Co., Ltd.) 30Kg, epoxy furan (Hebei Two Bran International Trade Co., Ltd.) 3Kg.

[0048] The preparation method is as described in Example 1.

Embodiment 3

[0050] Weigh the following ingredients by weight:

[0051] Polylactic acid (4032D of U.S. Natureworks) 55Kg, cornstarch (Zhucheng Xingmao Corn Development Co., Ltd.) 40Kg, epoxy furan (Hebei Two Bran International Trade Co., Ltd.) 5Kg.

[0052] The preparation method is as described in Example 1.

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Abstract

The invention discloses a fully biodegradable polylactic acid composite material. The composite material comprises, in percentage by weight, 55-79% of polylactic acid, 20-40% of starch and / or bamboo fibers and 1-5% of epoxy furan resin; on the basis that advantages of high strength and high modulus of the polylactic acid are kept, the composite material has the reproducibility and the fully biodegradable performance and completely conforms to green, low-carbon and sustainable economy development requirements. The invention further discloses a preparation method of the fully biodegradable polylactic acid composite material. The polylactic acid and the starch and / or the bamboo fibers are dried and then evenly mixed with the epoxy furan resin, and the fully biodegradable polylactic acid composite material is obtained through melting extrusion, cooling and granulation. The preparation method is simple, easy to control and implement and high in operability, the production cost is low, and the prepared composite material is very applicable to fields of disposable tableware, hotel consumables and the like.

Description

technical field [0001] The invention relates to the field of polylactic acid composite material and its preparation, in particular to a fully bio-based degradable polylactic acid-based composite material and a preparation method thereof. Background technique [0002] With the rapid development of the global economy, plastics have become indispensable materials in various fields. However, most of the existing plastics are derived from petroleum and are not biodegradable, causing white pollution. In addition, the processing method of petroleum-based plastics is mainly incineration, which will greatly aggravate the greenhouse effect and smog weather. With the shortage of petroleum resources, white pollution, greenhouse effect and smog weather, bio-based degradable polymer materials have gradually attracted people's attention. In recent years, China, EU countries and the United States have all issued measures to restrict the use of single-use non-degradable plastic products. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L67/04C08L3/02C08L97/02C08L63/00
Inventor 孙晋皓汤兆宾李鹏朱锦
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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