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Starch-based biodegradable combination as well as preparation method and application thereof

A technology of biodegradation and biopolymer, which is applied in the field of starch-based biodegradable compositions, can solve the problems of poor compatibility and the decline of mechanical properties of products, and achieve the effect of good processing performance and cost reduction

Active Publication Date: 2010-12-29
ANHUI XUELANG BIOTECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually thermoplastic starch is obtained by high temperature and high pressure extrusion in the presence of polyols such as glycerin, sorbitol, etc. However, this thermoplastic starch is a hydrophilic polymer, while PCL, PLA, PHB, etc. are hydrophobic polymers. The compatibility between the two phases is poor, and when the starch filling amount is large, the mechanical properties of the resulting product will be greatly reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: Preparation of glyceryl malate (DGMA)

[0044] 1.34kg of malic acid and 1.84kg of glycerol are placed in a 5L reactor equipped with a water separator, and N 2 The reaction was stirred at 130-140°C for 15 hours, 0.4 kg of water was separated, the acid value was less than 3%, and a colorless and transparent viscous liquid DGMA was obtained.

Embodiment 2

[0045] Embodiment 2: Preparation of glyceryl tartrate (DGTA)

[0046] 1.50kg tartaric acid, 1.84kg glycerin are placed in the 5L reactor that water separator is equipped with, logical N 2 The reaction was stirred at 140-160°C for 8 hours, 0.4 kg of water was separated, the acid value was less than 3%, and a colorless and transparent viscous liquid DGTA was obtained.

Embodiment 3

[0047] Example 3: Preparation of compatibilizer polyglyceryl sebacate (PGS)

[0048] 2.06kg sebacic acid, 0.92kg glycerin are placed in the 5L reactor that water trap is equipped with, logical N 2 Stir and react at 140-160°C for 18 hours to obtain a colorless and transparent viscous resin PGS with a number average molecular weight of 8600, a weight average molecular weight of 34000 and a dispersion degree of 3.95.

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PUM

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Abstract

The invention provides a completely biodegradable combination which comprises the following components: a natural biopolymer occupying 5-70 percent of the total weight of the combination, a biodegradable polymer occupying 5-90 percent of the total weight of the combination, an interface reinforcing agent occupying 3-20 percent of the total weight of the combination, a plasticizer occupying 5-50 percent of the weight of starch and the balance of other processing additives acceptable to a plastic processing technology, wherein the natural biopolymer is the starch or modified starch, the biodegradable polymer is synthesized polyester, the interface reinforcing agent is thermoplastic hydroxylation polyester, and the compound plasticizer is compounded by glyceride of hydroxyl diacid and glycerol. The biodegradable combination has the advantages of higher starch content and good mechanical properties. The invention also provides a preparation method and application of the combination in preparing a plastic product.

Description

technical field [0001] The invention relates to a starch-based biodegradable composition, its preparation method and application. Background technique [0002] Due to the advantages of light weight, good chemical stability, easy processing, and low cost, plastics are widely used in various aspects of people's production and life, bringing great convenience to people's lives. However, due to the good stability, variety and difficulty of degradation of plastics, they put a lot of pressure on the environment after being used and discarded, and seriously interfere with the solid waste treatment system, making the treatment of plastic waste a worldwide problem. Therefore, the development of materials that have the use and processing properties of plastics, but can be decomposed by microorganisms in nature after use has aroused great interest, and biodegradable plastics have great application prospects. [0003] Starch is a naturally renewable biopolymer with good biodegradabilit...

Claims

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Application Information

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IPC IPC(8): C08L3/02C08L3/04C08L67/04C08L67/02C08L67/00C08L75/04C08K5/053C08K5/11
Inventor 李云政李碧茜
Owner ANHUI XUELANG BIOTECHNOLOGY CO LTD
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