摘要
综述了以聚β羟基丁酸（ＰＨＢ）为代表的可用作可降解塑料的聚羟基链烷酸（ＰＨＡ）在细胞内积聚的形态、动力学及其提取技术。
With 25 references, this review discussed a kind of degradable plastics synthesized by microorganisms, polyhydroxyalkanoic acids(PHA), representatively polyhydroxybutyric acid(PHB), mainly about its existing states in the cells, accumulation kinetics, and its extraction from the cells. PHB existed in bacteria cells as tiny granules, which were in the form of a mobile amorphous elastomer and could coalesce during cell growth. After PHA synthesis has been induced by a nutrient limitation, its rate droped from the maximum value in zero, analogous to the monomolecular decay model. PHA was extracted from the cells by a partially halogenated hydrocarbon (solvent') such as dichloromethane and precipitated by addition of an organic liquid(non solvent') which was not able to desolve PHA. After use, the solvent' and non solvent' should be recoved, seperated and re used.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第1期173-175,共3页
Polymer Materials Science & Engineering
关键词
可降解塑料
聚羟基丁酸
聚羟基链烷酸
微生物
degradable plastics, polyhydroxyalkanoic acids(PHA), polyhydroxybutyric acid(PHB)
