聚电解质
灵活性(工程)
石英晶体微天平
材料科学
溶剂
膜
化学物理
分子动力学
纳米技术
化学工程
化学
聚合物
有机化学
计算化学
吸附
复合材料
工程类
数学
统计
生物化学
作者
Liheng Dai,Fang Xu,Kang Huang,Yongsheng Xia,Yixing Wang,Kai Qu,Xin Li,Dezhu Zhang,Zhaodi Xiong,Yulin Wu,Xuhong Guo,Wanqin Jin,Zhi Xu
标识
DOI:10.1002/anie.202107085
摘要
Abstract Fast water transport channels are crucial for water‐related membrane separation processes. However, overcoming the trade‐off between flux and selectivity is still a major challenge. To address this, we constructed spherical polyelectrolyte brush (SPB) structures with a highly hydrophilic polyelectrolyte brush layer, and introduced them into GO laminates, which increased both the flux and the separation factor. At 70 °C, the flux reached 5.23 kg m −2 h −1 , and the separation factor of butanol/water increased to ≈8000, which places it among the most selective separation membranes reported to date. Interestingly, further studies demonstrated that the enhancement of water transport was not only dependent on the hydrophilicity of the polyelectrolyte chains, but also influenced by their flexibility in the solvent. Quartz crystal microbalance with dissipation and molecular dynamics simulations revealed the structure‐performance correlations between water molecule migration and the flexibility of the ordered polymer chains in the 2D confined space.
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