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Synthesis of polyester using enzyme-catalyzed polymerization

Synthesis of polyester using enzyme-catalyzed polymerization
酶催化聚合合成聚酯
批准号:
11217212
负责人:
MATSUMURA Shuichi
金额:
$14.02万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research on Priority Areas
财政年份:
1999
资助国家:
日本
项目状态:
已结题
起止时间:
1999 至 2002

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中文摘要
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英文摘要
It has been revealed that the hydrolase enzyme promoted the polymerization of versatile types of monomer forming polyesters and polycarbonates. One of the advantages of using a hydrolase enzyme for polymer production is the reversible reaction between polymerization and depolymerization. This study covers the enzyme-catalyzed polymerization and chemical recycling of biodegradable aliphatic polyesters and polycarbonates particularly highlighted for establishing green polymer chemistry. It was found that substrate specificity for the monomers was significantly influenced by the hydrolase enzyme origin. That is, four-membered lactones were readily polymerized by PHB depolymerase. On the other hand, medium and large-membered lactones were readily polymerized by lipase. Typical biodegradable polyesters, such as polycaprolactone (PCL), poly (3-hydroxyalkannoate) (PHA), polylactate (PLA), poly (alkylene alkanedioate) and poly (trimethylene carbonate), were depolymerized into the corresponding cyclic oligomers by using the immobilized lipase in an organic solvent containing a small amount of water. The obtained oligomer having a molecular weight of a few hundreds could be polymerized both by the lipase and conventional chemical catalyst. Supercritical carbon dioxide was also an adequate reaction medium for the lipase-catalyzed depolymerization of such a polyester into the repolymerizable cyclic oligomer as an organic solvent-free system. The continuous enzymatic degradation of aliphatic polyesters into cyclic oligomers was carried out using an immobilized lipase column in an organic solvent. PHA, PCL and poly (butylene adipate) were readily depolymerized into the corresponding cyclic oligomers by passage through the enzyme column packed with immobilized lipase using a toluene solution at 40℃. These results imply that even in the polymer industry, a sustainable polymer production system will be realized using biocatalysts.
期刊论文(166)
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会议论文
Shuichi Matsumura: "Lipase-catalyzed transformation of poly(trimethylene carbonate) into cyclic monomer, trimethylene carbonate : A new strategy for sustainable polymer recycling using an enzyme"Macromolecular Rapid Communications. 22・3. 215-218 (2001)
Shuichi Matsumura:“脂肪酶催化聚(三亚甲基碳酸酯)转化为环状单体三亚甲基碳酸酯:使用酶进行可持续聚合物回收的新策略”Macromolecular Rapid Communications 22・3(2001)。
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Y.Osanai: "Lipase-catalyzed reaction of molecularly pure linear and cyclic poly(3-hydroxybutanoate)s : Evidence of cyclic polymer formation"Chemistry Letters. 6号. 576-577 (2000)
Y.Osanai:“分子纯线性和环状聚(3-羟基丁酸酯)的脂肪酶催化反应:环状聚合物形成的证据”化学快报第 6 号。576-577(2000)
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Shuichi Matsumura: "Lipase-catalyzed polymerization of diethyl crbonate and diol to alphatic poly(alkylene carbonate)"Macromolecular Chemistry and Physics. (印刷中). (2000)
Shuichi Matsumura:“脂肪酶催化碳酸二乙酯和二醇聚合成脂肪族聚(碳酸亚烷基酯)”《高分子化学与物理》(出版中)。
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松村秀一: ""脱石油素材化に向けた生分解性プラスチックの高機能化とその応用", 第8講酵素を使用したプラスチックリサイクルと生分解性プラスチックへの応用"エヌ・ティー・エス(NTS). 36 (2003)
Shuichi Matsumura:“提高生物降解塑料的功能及其应用以摆脱石油材料”,讲座 8:使用酶进行塑料回收及其在生物降解塑料中的应用”NTS (NTS) 36 (2003)。
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