Preparation of biodegradable fermentation organic acid ployester

A biodegradation and organic acid technology, applied in the field of polymer materials, can solve the problems of limited sources of raw materials and catalysts, difficult control of cross-linked products, long reaction time for synthesis and preparation, etc. and social benefits, the effect of easy promotion and application

Inactive Publication Date: 2011-07-06
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In summary, there have been reports on several biodegradable network-type organic acid polyester materials and their preparation methods, but some of them have many reaction components, the synthesis and preparation reaction time is too long, and the cross-linked products are not easy to control. , many sources of raw materials and catalysts used are subject to certain restrictions

Method used

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  • Preparation of biodegradable fermentation organic acid ployester
  • Preparation of biodegradable fermentation organic acid ployester
  • Preparation of biodegradable fermentation organic acid ployester

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Add weighed 28.78g citric acid, 10.0ml glycerin and 2 drops of 25% sulfuric acid solution in the flask of rotary evaporator. Turn on the vacuum pump, and when the vacuum degree reaches about -0.09MPa, turn on the heating and rotary switch of the rotary evaporator to allow it to react. The temperature of the oil bath is controlled at 50-90°C, and the mixture is evenly mixed. After about 30 minutes, a prepolymer is initially formed. The prepolymer is coated on 16 glass slides respectively, placed in a blast drying oven, and reacted for 14 hours to 36 hours respectively, and the temperature is controlled at 60-160°C. After the reaction is completed, take it out, put it in an enamel square plate and soak it in distilled water 12-24 hours, until the product falls off from the glass slide, dry at 110°C or dry the product at 70°C under vacuum. The product prepared above was detected by infrared spectroscopy to obtain the attached Figure 5 , in the figure, the characteristic...

Embodiment 2

[0039] Add weighed 14.80g citric acid, 5.0ml glycerin and 2 drops of 25% sulfuric acid solution in the three-necked flask, add water 10mL. Reflux at 80°C for 1 hour and mix well. Cast the solution on the surface of a clean glass or polytetrafluoroethylene plate, place it in a blast drying oven, control the temperature at 110-150°C and react for 12-36 hours, take it out after the reaction is completed, and place it in an enamel square plate for use Soak in distilled water for 12 to 24 hours until the product falls off the glass or Teflon surface, and vacuum dry the product at 70°C.

Embodiment 3

[0041] Add 5.0ml glycerin, 14.80g citric acid, and 2 drops of 20% sulfuric acid to the flask of the rotary evaporator, mix well, connect the rotary evaporator, the vacuum degree reaches about -0.09MPa, the temperature rises to 140°C, and rotate After 4 hours, it was poured out while it was hot, and the product solidified quickly.

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Abstract

The invention discloses a preparation method for biodegradable fermented organic acid polymer, which belongs to the polymer material technical field. The method comprises the following steps that: fermented ternary or binary organic acid and glycerol are evenly mixed according to the mol ratio of between 1 to 0.6 and 1 to 1.4, catalyst which accounts for 0.1 to 5 weight percent of the total weight of the organic acid is added and evenly mixed with reactants, and a condensation polymerization reaction is performed for 0.5 to 3 hours under vacuum pressure reduction at a temperature of between 50 and 90 DEG C to form a viscous prepolymer; and the prepolymer is controlled to be a temperature of between 60 and 160 DEG C and continues to react for 12 to 36 hours to produce the biodegradable fermented organic acid polymer. The preparation method is simple and has high synthesis efficiency; and the prepared biodegradable fermented organic acid polymer has a completely degraded final product.

Description

technical field [0001] The invention relates to a polymer material, in particular to a preparation method of a biodegradable fermented organic acid polyester. The organic acids used are derived from microbial fermentation, including citric acid, malic acid, succinic acid, tartaric acid and itaconic acid. biomedical materials. technical background [0002] Common biodegradable polyester materials include: linear aliphatic polyester, network polyester, polyether ester, polyorthoester, etc. Among the linear aliphatic polyesters, polylactide (PLA) (also known as polylactic acid) and polyglycolide (PGA) (also known as polyglycolic acid) and their copolymers appeared earlier and are widely used in orthopedic fixation, Biomedical fields such as tissue engineering, surgical sutures, and sustained-release drug carrier materials. Polyhydroxyalkanoate elastomer (PHA), which is synthesized by microorganisms and can be completely degraded, is another type of linear polyester biomateri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/78C08G63/12
Inventor 董坚叶赛张贝妮黄燕飞张亚博鹿萍陈强
Owner SHAOXING UNIVERSITY
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