Novel biomass polyester and preparation thereof

A biomass and polyester technology, applied in the field of biomass polyester and its preparation, can solve the problems of long reaction time and difficult control of cross-linked products, and achieve short reaction time, easy control of cross-linking degree, and environmental friendliness Effect

Inactive Publication Date: 2011-07-27
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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  • Novel biomass polyester and preparation thereof
  • Novel biomass polyester and preparation thereof
  • Novel biomass polyester and preparation thereof

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 it on the metal surface, and then put it into an oven and heat it at 100°C to 120°C for 10h to obtain a colorless film with a glass transition temperature of T g = -19°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 1734cm -1 (Ester group C=O stretches) 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 mixed, the other remains unchanged, after heating for 10h, a colorless film is obtained, and the glass transition temperature T g = -5°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 it, pour it on the metal surface, and then put it into a vacuum oven and heat it at 90°C or 100°C for 11h to obtain 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 1723cm -1 (Ester group C=O stretches) and 1107cm -1 (Ester group C-O-C stretching) and other positions.

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Abstract

The invention discloses biomass polyester and a preparation method thereof. The invention belongs to the technical field of polymer materials, including the following steps: fermented ternary or binary organic acids are evenly mixed with polyol in accordance with the molar proportion of 1:0.2-1:5 for the functional groups; catalyst is added in accordance with the proportion of 0.1-5wt% of the total weight of organic acid and mixed with the reactant; and when the vacuum is decompressed at 50-120 DEG C, condensation polymerization reaction is carried out for 0.5-15 hours so as to form a prepolymer; and then the prepolymer is controlled below 60-160 DEG C in temperature and later reacted continually for 3-36 hours so as to obtain the biomass polyester. The invention has simple synthesis process and easily-controlled cross-linking degree, and introduces hydroxyl and carboxyl which are contained in malic acid and citric acid in a macromolecular chain, thus causing the products to have highhydrophilicity and more conducive to the combination and attack of enzyme and water. The products which are generated by complete degradation of end products continue to return to the biomass resource, and also have good biocompatibility and wide application scope.

Description

technical field [0001] The invention relates to a kind of biomass polyester and a preparation method thereof. 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 pla...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/16C08G63/12
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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