Two Dimensional Layered Materials for Separation Membranes(2)

2014中国国际石墨烯创新大会(Grap-China 2014)——Pressure-driven ultrafiltration membranes are important in separation applications.Advanced filtration membranes with great permeance and superior rejection must be developed to meet rising worldwide demand. Here we report on layered two dimensional nanosheets assembled ultrafiltration membranes with a network of nanochannels with a narrow size distribution (3-5 nm) and superior separation performance.Their permeance offers a ten-hundred folds enhancement without sacrificing the rejection compared to that of commercial ultrafiltration membranes with similar rejection. This flow enhancement is attributed to the porous structure and significant reduced channel length. The pressure-dependent separation behavior is also reported. The water flow through these hydrophilic nanochannels is identified as viscous. This approach is also extendable to other laminate membranes, providing great potential for accelerating separation and water-purification processes.

关键词: 石墨烯 超级过滤膜 二维层状材料 压力驱动

主讲人:Prof. Xinsheng Peng 机构:Department of Materials Science and Engineering,State Key Laboratory of Silicon Materials,Zhejiang University

时长:0:17:40 年代:2014年