纳米片
渗透汽化
膜
聚二甲基硅氧烷
材料科学
化学工程
气体分离
选择性
纳米技术
化学
有机化学
渗透
催化作用
生物化学
工程类
作者
Li‐Hao Xu,Shenhui Li,Heng Mao,Yan Li,Ao‐Shuai Zhang,Sen Wang,Weimin Liu,Jing Lv,Tao Wang,Weiwei Cai,Le Sang,Wenjie Xie,Chan Pei,Zhengzheng Li,Yingnan Feng,Zhi‐Ping Zhao
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2022-10-21
卷期号:378 (6617): 308-313
被引量:94
标识
DOI:10.1126/science.abo5680
摘要
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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