Man-made urushi : Preparation of crosslinked polymeric films from renewable resources via air-oxidation processes
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概要
- 論文の詳細を見る
“Man-made (artificial) urushi”has been prepared by laccase-catalyzed curing of new urushiol analogues, which were facilely synthesized by lipase-catalyzed regioselective acylation of catechol derivatives having a primary alcohol with unsaturated fatty acids derived from plant oils, one of the most important renewable resources. The curing of the catechol derivative having two or three unsaturated group proceeded under mild reaction conditions to produce the crosslinked film (“man-made urushi”) with high hardness and gloss surface, which are comparable with those of natural urushi coating. Similar urushiol analogues from 4-hydroxyphenetyl alcohol and unsaturated fatty acids were subjected to an oxidative polymerization by Fe-salen catalyst, yielding soluble polyphenols having the unsaturated group in the side chain. Cardanol, a phenol derivative mainly having a C15 unsaturated hydrocarbon chain with 1-3 double bonds at m-position, is obtained from cashew nut shell liquid. Oxidative polymerization of cardanol by peroxidase or Fe-salen catalyst gave the crosslinkable polyphenol. These prepolymers were subjected to hardening by thermal treatment or cobalt naphthenate catalyst to give a crosslinked film (also, “man-made urushi”) with good hardness.
- 日本学士院の論文
著者
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TSUJIMOTO Takashi
Department of Applied Chemistry, Graduate School of Engineering, Osaka University
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UYAMA Hiroshi
Department of Applied Chemistry, Graduate School of Engineering, Osaka University
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KOBAYASHI Shiro
Department of Neurosurgery, Chiba Hokusoh Hospital, Nippon Medical School
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Tanaka Hozumi
Toyo Ink Mfg. Co. Ltd.
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IKEDA Ryohei
Joint Research Center for Precision Polymerization-Japan Chemical Innovation Institute, NIMC
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OYABU Hiroshi
Kyoto Municipal Institute of Industrial Reseach
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Uyama Hiroshi
Department Of Applied Chemistry Graduate School Of Engineering Osaka University
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Tsujimoto Takashi
Department Of Materials Chemistry Graduate School Of Engineering Kyoto University
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Tsujimoto Takashi
Department Of Applied Chemistry Graduate School Of Engineering Osaka University
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Kobayashi Shiro
Department Of Material Chemistry Graduate School Of Engineering Kyoto University
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IKEDA Ryohei
Joint Research Center for Precision Polymerization (JRCPP)-Japan Chemical Innovation Institute (JCII)
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Tanaka Hozumi
Toyo Ink Mfg. Co., Ltd.
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