Spherical silica-based mesocellular foam (MCF) with pores of average size 22 nm interconnected by 11.8 nm windows was synthesized and then functionalized with alkyl groups using propyl, butyl-, octyl-and octadecyltrimethoxysilane. Rhizopus oryzae lipase (ROL) was immobilized on MCF and alkyl-functionalized MCF (alkyl-MCF) by physical adsorption. The transesterification reaction activity of (S)-glycidol and vinyl n-butyrate using ROL immobilized on alkyl-MCF increased with increase in alkyl chain length, implying that the more hydrophobic the microenvironment, the greater the activation of ROL The specific activity of transesterification reaction by ROL immobilized on C-18-MCF was 73 times higher than that of free ROL. ROL immobilized on C-18-MCF could be reused for eight batches without significant loss of activity. (C) 2008 Elsevier Inc. All rights reserved.
机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Schmidt-Winkel, P
Lukens, WW
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机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Lukens, WW
Zhao, DY
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机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Zhao, DY
Yang, PD
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机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Yang, PD
Chmelka, BF
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机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Chmelka, BF
Stucky, GD
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Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Schmidt-Winkel, P
Lukens, WW
论文数: 0引用数: 0
h-index: 0
机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Lukens, WW
Zhao, DY
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h-index: 0
机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Zhao, DY
Yang, PD
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h-index: 0
机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Yang, PD
Chmelka, BF
论文数: 0引用数: 0
h-index: 0
机构:Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA
Chmelka, BF
Stucky, GD
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h-index: 0
机构:
Univ Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USAUniv Calif Santa Barbara, Dept Chem, Mat Res Lab, Santa Barbara, CA 93106 USA