Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis
The rational design and realization of multiscale porous structures has been a long-standing challenge in membrane science. Block copolymers (BCPs) with their self-assembly-enabled nanodomains have the potential to make structural breakthroughs. An amphipathic Janus membrane, with a hierarchical mul...
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doaj-85736f396f584ffc913015ad5ef966fc2020-11-25T03:39:20ZengMDPI AGMembranes2077-03752020-07-011016216210.3390/membranes10080162Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial CatalysisYakai Lin0Yuanyuan Liu1Yicheng Su2Lin Wang3Yuanhui Tang4Tianyin Liu5Liwei Ren6Xiaolin Wang7Beijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaAerospace Institute of Advanced Materials & Processing Technology, China Aerospace Science & Industry Corp., Beijing 100084, ChinaBeijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaBeijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaCollege of Chemistry and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaBeijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaCollege of Biological and Pharmaceutical Sciences, China Three Gorges University, Yichang 443002, ChinaBeijing Key Laboratory of Membrane Materials and Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, ChinaThe rational design and realization of multiscale porous structures has been a long-standing challenge in membrane science. Block copolymers (BCPs) with their self-assembly-enabled nanodomains have the potential to make structural breakthroughs. An amphipathic Janus membrane, with a hierarchical multiscale hyperporous structure constituted by polystyrene-b-poly(4-vinylpyridine) (PS4VP) and polyvinylidene fluoride (PVDF) blocks, was designed and synthesized in this work. Hydrophobic PVDF dominated one side of the membrane, and hydrophilic PS4VP, with nanopores that formed inside the macroporous channels of PVDF via a self-assembly approach, dominated the other side. Candida Rugosa Lipase (CRL), as a model biocatalyst, was immobilized in the PS4VP nanopores via injection. The immobilized lipase was exactly suspended at the interface of the organic and aqueous phases, owing to the amphipathic property of the Janus membrane. The designed structures and catalysis performances were further characterized. The immobilized lipase exhibited a three times higher specific activity than free lipase, and the relative activity still remained above 90% after 10 cycles of reusing, indicating the observable promotion and the guaranteed stability of the Janus membrane in interfacial catalysis. This work provided a general, facile and unique example for the design and synthesis of a hierarchical multiscale hyperporous membrane for interfacial catalysis.https://www.mdpi.com/2077-0375/10/8/162janus membraneamphipathicmultiscaleinterfacial catalysis |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yakai Lin Yuanyuan Liu Yicheng Su Lin Wang Yuanhui Tang Tianyin Liu Liwei Ren Xiaolin Wang |
spellingShingle |
Yakai Lin Yuanyuan Liu Yicheng Su Lin Wang Yuanhui Tang Tianyin Liu Liwei Ren Xiaolin Wang Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis Membranes janus membrane amphipathic multiscale interfacial catalysis |
author_facet |
Yakai Lin Yuanyuan Liu Yicheng Su Lin Wang Yuanhui Tang Tianyin Liu Liwei Ren Xiaolin Wang |
author_sort |
Yakai Lin |
title |
Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis |
title_short |
Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis |
title_full |
Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis |
title_fullStr |
Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis |
title_full_unstemmed |
Amphipathic Janus Membrane with Hierarchical Multiscale Hyperporous Structure for Interfacial Catalysis |
title_sort |
amphipathic janus membrane with hierarchical multiscale hyperporous structure for interfacial catalysis |
publisher |
MDPI AG |
series |
Membranes |
issn |
2077-0375 |
publishDate |
2020-07-01 |
description |
The rational design and realization of multiscale porous structures has been a long-standing challenge in membrane science. Block copolymers (BCPs) with their self-assembly-enabled nanodomains have the potential to make structural breakthroughs. An amphipathic Janus membrane, with a hierarchical multiscale hyperporous structure constituted by polystyrene-b-poly(4-vinylpyridine) (PS4VP) and polyvinylidene fluoride (PVDF) blocks, was designed and synthesized in this work. Hydrophobic PVDF dominated one side of the membrane, and hydrophilic PS4VP, with nanopores that formed inside the macroporous channels of PVDF via a self-assembly approach, dominated the other side. Candida Rugosa Lipase (CRL), as a model biocatalyst, was immobilized in the PS4VP nanopores via injection. The immobilized lipase was exactly suspended at the interface of the organic and aqueous phases, owing to the amphipathic property of the Janus membrane. The designed structures and catalysis performances were further characterized. The immobilized lipase exhibited a three times higher specific activity than free lipase, and the relative activity still remained above 90% after 10 cycles of reusing, indicating the observable promotion and the guaranteed stability of the Janus membrane in interfacial catalysis. This work provided a general, facile and unique example for the design and synthesis of a hierarchical multiscale hyperporous membrane for interfacial catalysis. |
topic |
janus membrane amphipathic multiscale interfacial catalysis |
url |
https://www.mdpi.com/2077-0375/10/8/162 |
work_keys_str_mv |
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