NDLI: Enzymatic degradation of poly(<i>R,S</i>-3-hydroxybutanoate) to cyclic oligomers under continuous flow

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Enzymatic degradation of poly(R,S-3-hydroxybutanoate) to cyclic oligomers under continuous flow

Content Provider	Royal Society of Chemistry (RSC)
Author	Osanai, Yasushi Toshima, Kazunobu Matsumura, Shuichi
Copyright Year	2003
Abstract	The enzymatic degradation of chemically synthesized poly(R,S-3-hydroxybutanoate) (PHB) to a reactive cyclic oligomer under continuous flow using an enzyme column was studied and directed towards green chemical recycling. It was confirmed that atactic and syndiotactic PHBs were quantitatively transformed into the corresponding cyclic oligomer by passing through a column packed with immobilized lipase from Candida antarctica (Novozym 435) at 40 °C using toluene solution. The degradability of the polymer depended on the reaction conditions, such as flow rate and the polymer concentration. A higher flow rate and higher polymer concentration caused incomplete degradation of the polymer. The 40 °C-degradation was suitable for both rapid degradation of PHB and enzyme stability. The degradation activity of the enzyme column was maintained for at least two months at 40 °C.
Starting Page	567
Ending Page	570
Page Count	4
File Format	HTM / HTML PDF
ISSN	14639262
Volume Number	5
Issue Number	5
Journal	Green Chemistry
DOI	10.1039/b304640k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Candida antarctica Oligomer Enzyme Tacticity Lipase Candida albicans Toluene Polymer
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Pollution

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