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Biomass polyester

A biomass and polyester technology, applied in the field of biomass polyester, can solve the problems of difficult control of cross-linked products and long reaction time, and achieve the effects of easy control of cross-linking degree, short reaction time and simple synthesis process

Inactive Publication Date: 2011-09-14
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] For the several network-type organic acid polyester materials and their preparation methods mentioned above, some of the raw materials and catalyst sources used are subject to certain restrictions, and there are many The reaction time for synthesis and preparation is too long, and the cross-linked product is not easy to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of polyxylitol malate (PXM): Mix DL-malic acid and xylitol according to [-COOH]:[-OH] = 1:1, add 10ml ethanol, add 0.1 ~ 0.6ml 20% sulfuric acid, heated to dissolve completely. Cool, pour on a metal surface, then place in an oven at 100 o C~120 o C heating 10h, a colorless film is obtained, the glass transition temperature T g = -19 o c.

[0045] The product prepared above was detected by infrared spectroscopy to obtain the attached figure 1 , in the figure, the characteristic peak related to the ester group appears at 1734 cm -1　 (ester group C=O expansion) and 1167cm -1　 (Ester group C-O-C stretching) and other positions.

Embodiment 2

[0047] Similar to Example 1, but the reactant malic acid and xylitol ingredient ratio is changed to [-COOH]:[-OH] = 1:2 mixing, the other remains unchanged, after heating for 10h, a colorless film is obtained, and the glass transition temperature T g = -5 o c.

Embodiment 3

[0049] Preparation of polyglyceryl itaconate (PGI): mix 1.3010 g of itaconic acid with 0.73 ml of glycerin, add 20 ml of ethanol, add 0.5 ml of 20% sulfuric acid, and heat to dissolve completely. Cool, pour onto a metal surface, then place in a vacuum oven at 90 o C or 100 o C heating 11h, a colorless or light yellow film. The product was detected by infrared spectroscopy figure 2 , in the figure, the characteristic peak related to the ester group appears at 1723 cm -1　 (ester group C=O expansion) and 1107cm -1　 (Ester group C-O-C stretching) and other positions.

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Abstract

The invention discloses biomass polyester, and belongs to the technical field of polymer materials. The preparation method of the biomass polyester comprises the following steps: evenly mixing fermented ternary or binary organic acid with polyalcohol according to mol ratio of functional groups of 1:(0.2-1):5, adding a catalyst which accounts for 0.1-5wt% of the total weight of the organic acid and evenly mixing the catalyst with a reactant, and performing condensation polymerization under the condition of vacuum decompression at 50-120 DEG C for 0.5-15 hours to form a prepolymer; and continuously reacting at the temperature below 60-160 DEG C for 3-36 hours to obtain the biomass polyester. The preparation method has the advantages that synthetic process is simple, crosslinking degree is easy to control, and hydroxyl and carboxyl contained in malic acid and citric acid are introduced into a macromolecular chain so as to realize high hydrophilcity of the product, which is more beneficial to united attack of enzyme and water; and the product generated after complete degradation of a final product returns to biomass resource and has good biocompatibility, thus having wide application range.

Description

Technical field: [0001] The invention relates to a biomass polyester. It belongs to the technical field of polymer compounds and their preparation, and is characterized in that the organic acid monomers used are derived from microbial fermentation, including malic acid, itaconic acid, citric acid and succinic acid, etc., and the polyol monomers used include biomass The non-toxic glycerin and xylitol produced from raw materials are a kind of network-type cross-linked materials, which are mainly used in environment-friendly materials and biomedical materials. Background technique: [0002] The development of biomass polymer resin has two meanings: on the one hand, it has environmental protection significance because it can be completely degraded. The use of non-degradable or partially degradable plastic mulch has affected the quality of arable land. Every year, tens of millions of hectares of farmland are covered with petroleum-based plastic mulch, which leads to soil fertili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/12C08G63/52C08G63/78C08L67/04C08L67/06A61L27/18A61L31/06A61K47/34
Inventor 董坚徐晓红刘实欣石品游欢欢叶赛鹿萍刘伟
Owner SHAOXING UNIVERSITY
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