Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 602, Issue -, Pages 426-436Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2021.06.017
Keywords
Hydrophobicity; Lipase immobilization; Metal-organic frameworks; Biodiesel production
Categories
Funding
- Science and Technology Program of Tianjin, China [20ZYJDJC00080]
- Postgraduate Research Innovation project of Tianjin, China [2020YJSB122]
- National Natural Science Foundation of China [21676069]
- Talent team project of Ningxia Hui Autonomous Region, China [KJT2018010]
- Innovation Project of Excellent Doctoral Dissertation of Tianjin University of Science and Technology [2020009, 2019010]
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In this study, the hydrophobic ZIF-L coated with PDMS was successfully used to immobilize lipase from Aspergillus oryzae, enhancing its stability and activity recovery. The immobilized lipase exhibited better storage stability and catalyzed higher biodiesel yield, showing great potential for biodiesel production.
Inspired by the interfacial catalysis of lipase, Herein, the hydrophobic ZIF-L coated with polydimethylsiloxane (PDMS) were prepared by chemical vapor deposition (CVD) and used to immobilize lipase from Aspergillus oryzae (AOL) for biodiesel production. The results showed that the PDMS coating enhanced the stability of ZIF-8 and ZIF-L in PBS. Immobilization efficiency of AOL on PDMS-modified ZIF-L was 96% under optimized conditions. The resultant immobilized lipase (AOL@PDMS-ZIF-L) exhibited higher activity recovery (430%) than AOL@ZIF-L. Meanwhile, compared with free lipase, the AOL@PDMS-ZIF-L exhibited better storage stability and thermal stability. After 150 days of storage, the free lipase retained only 20% of its original activity of hydrolyzing p-NPP, while the AOL@PDMS-ZIF-L still retained 90% of its original activity. The biodiesel yield catalyzed from soybean oil by free lipase was only 69%, However, the biodiesel yield by AOL@PDMS-ZIF-L reached 94%, and could still be maintained at 85% even after 5 consecutive cycles. It is believed that this convenient and versatile strategy has great promise in the important fields of immobilized lipase on MOF for biodiesel production. (c) 2021 Elsevier Inc. All rights reserved.
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