PHYSICAL-PROPERTIES AND BIODEGRADABILITY OF MICROBIAL POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYHEXANOATE)
PHYSICAL-PROPERTIES AND BIODEGRADABILITY OF MICROBIAL POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYHEXANOATE)
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DOI：
10.1021/ma00081a041
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发表时间：
1994-01-31
期刊：
影响因子：
5.5
通讯作者：
DOI, Y
中科院分区：
文献类型：
--
作者：
SHIMAMURA, E;KASUYA, K;DOI, Y
介绍。（R)-3-羟基丁酸（3HB）和CR）-3-羟基戊酸（3HV）的光学活性共聚物是最近由帝国化学工业公司（ICI）引入的一种可生物降解的热塑性塑料。以葡萄糖和丙酸为碳源，通过发酵法制备了共聚酯。微生物共聚酯具有统计学上随机分布的3HB和3HV单元，3-5，它们在从0到95 mol% 3HV的广泛组成范围内表现出大约相同的高结晶度（bbb50 %），因为P （3HB-co-3HV）共聚物与主组分的均聚物在相同的晶格中结晶。4-6·7共聚物组成不同，其机械和物理性能也不同。6-12 P （3HB）解聚合酶对P （3HB-co- 3hv）膜的酶表面侵蚀速率比P （3HB）膜的酶表面侵蚀速率慢。最近，Shiotani和kobayash15发现，从橄榄油中提取气单胞菌（Aeromonas caviae）产生3HB和3-羟基己酸酯（3HH）的共聚物。本文研究了P （3HB-co-3HH）共聚物的结构、物理性质和酶降解性，并与P （3HB-co-3HV）的结果进行了比较。一种3HB、3HV和3HH的三元共聚物最早是在红桃属植物中产生的。16
Introduction. An optically active copolymer of (R)-3-hydroxybutyric acid (3HB) and CR)-3-hydroxyvaleric acid (3HV) has recently been introduced by Imperial Chemical Industries (ICI) as a biodegradable thermo-plastic. 1 The copolyester has been producedin a fer-mentation process using glucose and propionic acid as the carbon sources for Alcaligenes eutrophus. 2 The microbial copolyesters have a statistically random distribution of 3HB and 3HV units, 3-5 andthey exhibit approximately the same high degree of crystallinity (> 50%) throughout a wide range of compositions from 0 to 95 mol% 3HV, since P (3HB-co-3HV) copolymers crystallize in the same crystalline lattice as homopolymers of the main compo-nent. 4-6· 7 The mechanical and physical properties varied with the copolymer composition. 6-12 The rate of enzymatic surface erosion of P (3HB-co-3HV) films by P (3HB) depolymerase was slower than the rate of P (3HB) film. 13· 14 Recently, Shiotani and Kobayashi15 have found that Aeromonas caviae produces a copolymer of 3HB and 3-hydroxyhexanoate (3HH) from olive oil. In this paper we investigate the structure, physical properties, and enzymatic degradability of P (3HB-co-3HH) copolymers and compare the results with those of P (3HB-co-3HV). A terpolymer of 3HB, 3HV, and 3HH was first produced in Rhodospillium rubrum. 16