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Method for preparing biodegradable material poly-beta-hydroxybutyrate

A biodegradable material, a technology of hydroxybutyrate, which is applied in the field of preparing biodegradable material poly-β-hydroxybutyrate, can solve problems such as being inconsistent with environmental protection, shorten reaction time, reduce production cost, and simplify preparation process Effect

Active Publication Date: 2016-07-27
SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Related reports indicate that β-butyrolactone is a carcinogenic substance, which does not conform to the concept of green environmental protection

Method used

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  • Method for preparing biodegradable material poly-beta-hydroxybutyrate
  • Method for preparing biodegradable material poly-beta-hydroxybutyrate
  • Method for preparing biodegradable material poly-beta-hydroxybutyrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 30 mL of ethyl 3-hydroxybutyrate was placed in a 250 mL round bottom flask, 10 mL of tetrabutyl titanate with a mass concentration of 98% was added, and 0.11 mL of deionized water was added dropwise. The flask was heated by an electric heating mantle, and reacted at about 160°C for 2.5 hours to obtain the product poly-β-hydroxybutyrate. After testing, the sample size of the prepared product was 4.0257g, and the viscosity-average molecular weight of the product was 55455.5g / mol.

Embodiment 2

[0026] 30 mL of ethyl 3-hydroxybutyrate was placed in a 250 mL round bottom flask, 10 mL of tetrabutyl titanate with a mass concentration of 98% was added, and 0.25 mL of deionized water was added dropwise. The flask was heated by an electric heating mantle, and reacted at about 150°C for 2.5 hours to obtain the product poly-β-hydroxybutyrate. After testing, the sample size of the prepared product was 6.7267g, and the viscosity-average molecular weight of the product was 30506.4g / mol.

Embodiment 3

[0028] 45 mL of ethyl 3-hydroxybutyrate was placed in a 250 mL round bottom flask, 15 mL of tetrabutyl titanate with a mass concentration of 98% was added, and 0.11 mL of deionized water was added dropwise. Place the flask in an electric heating mantle to heat, and react at about 155°C for 3.5 hours to obtain the product poly-β-hydroxybutyrate. After testing, the sample size of the prepared product was 3.0805g, and the viscosity-average molecular weight of the product was 25449.3g / mol.

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Abstract

The invention belongs to the technical field of chemical synthesis, and particularly discloses a method for preparing a biodegradable material poly-beta-hydroxybutyrate.The method includes the steps that a certain amount of ethyl 3-hydroxybutyrate, a catalyst and water are stirred evenly, then a heating reaction is performed for 2-3.5 h, and the poly-beta-hydroxybutyrate with a certain viscosity-average molecular weight is obtained.According to the method, it is unnecessary to introduce inert gas like nitrogen or argon into the reaction process, so that operation is easy and convenient.According to the technical scheme, the time of preparing PHB in a heating state does not exceed 4 h and is 1 / 2 or shorter the reaction time of other traditional methods.By means of the preparation method, the reaction time is significantly shortened, the preparation process is simplified, and the production cost is lowered.

Description

technical field [0001] The invention belongs to the technical field of chemical synthesis, and in particular relates to a method for preparing biodegradable material poly-beta-hydroxybutyrate. Background technique [0002] Poly-β-hydroxybutyrate (PHB) is an aliphatic polyester compound with good biodegradability and biocompatibility. It is a new type of material that can be completely biodegraded. Its applications include the production of fast food boxes Disposable products such as plastic film and packaging materials can also be used in high-tech industries such as medicine, optoelectronic chemistry, and fine chemicals, and have a broad market in high-tech and high value-added fields. [0003] At present, PHB is mainly prepared by biological fermentation, and its product price is high, and the prepared product is a large molecular weight mixed polymer of various compounds, which greatly limits its popularization and application. Due to the long period and high cost of bio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/06C08G63/78C08G63/85C08G63/87
CPCC08G63/06C08G63/78C08G63/85C08G63/87C08G2230/00
Inventor 张英民杜馨杨文超齐剑英卢文洲陆俊卿
Owner SOUTH CHINA INST OF ENVIRONMENTAL SCI MEP
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