Highly flexible and superhydrophobic MOF nanosheet membrane for ultrafast alcohol-water separation | Zendy

LiHao Xu | Zendy; Shenhui Li | Zendy; Heng Mao | Zendy; Yan Li | Zendy; AoShuai Zhang | Zendy; Sen Wang | Zendy; Weimin Liu | Zendy; Jing Lv | Zendy; Tao Wang | Zendy; Weiwei Cai | Zendy; Le Sang | Zendy; Wenjie Xie | Zendy; Chan Pei | Zendy; Zhengzheng Li | Zendy; Yingnan Feng | Zendy; ZhiPing Zhao | Zendy

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Highly flexible and superhydrophobic MOF nanosheet membrane for ultrafast alcohol-water separation

Author(s) -

LiHao Xu,

Shenhui Li,

Heng Mao,

Yan Li,

AoShuai Zhang,

Sen Wang,

Weimin Liu,

Jing Lv,

Tao Wang,

Weiwei Cai,

Le Sang,

Wenjie Xie,

Chan Pei,

Zhengzheng Li,

Yingnan Feng,

ZhiPing Zhao

Publication year - 2022

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.abo5680

Subject(s) - nanosheet , pervaporation , membrane , polydimethylsiloxane , materials science , chemical engineering , gas separation , selectivity , nanotechnology , chemistry , organic chemistry , permeation , catalysis , biochemistry , engineering

High-performance pervaporation membranes have potential in industrial separation applications, but overcoming the permeability-selectivity trade-off is a challenge. We report a strategy to create highly flexible metal-organic framework nanosheet (MOF-NS) membranes with a faveolate structure on polymer substrates for alcohol-water separation. The controlled growth followed by a surface-coating method effectively produced flexible and defect-free superhydrophobic MOF-NS membranes. The reversible deformation of the flexible MOF-NS and the vertical interlamellar pathways were captured with electron microscopy. Molecular simulations confirmed the structure and revealed transport mechanism. The ultrafast transport channels in MOF-NS exhibited an ultrahigh flux and a separation factor of 8.9 in the pervaporation of 5 weight % ethanol-water at 40°C, which can be used for biofuel recovery. MOF-NS and polydimethylsiloxane synergistically contribute to the separation performance.

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