Ultrathin self-assembled anionic polymer membranes for superfast size-selective separation
Ultrathin self-assembled anionic polymer membranes for superfast size-selective separation
复制标题
用于超快速尺寸选择性分离的超薄自组装阴离子聚合物膜
DOI：
10.1039/c3nr03362g
复制
发表时间：
2013-01-01
期刊：
影响因子：
6.7
通讯作者：
Liu, Qing Lin
中科院分区：
文献类型：
--
作者：
Deng, Chao;Zhang, Qiu Gen;Liu, Qing Lin
随着功能纳米材料的日益受到关注，具有优异分离性能的纳米多孔膜变得更加重要。在这里，通过在有机溶液中的氢氧化铜纳米链模板上自组装阴离子聚合物，在大孔支撑物上制备了新型超高渗透纳米孔膜。这种简便的方法作为制备超薄阴离子聚合物膜的通用方法具有巨大的潜力。所制备的自组装膜的平均孔径为 5-12 nm，可调厚度低至 85 nm。它们允许水的超快渗透，并在过滤过程中对带负电的溶质表现出优异的尺寸选择性分离性能和良好的抗污染性。 85 nm厚的膜具有超高水通量（3306 l m(-2) h(-1) bar(-1)），比商用膜大一个数量级，可以高效地将5和15 nm金纳米粒子从混合物中分离出来。新开发的纳米多孔膜在生物大分子和纳米颗粒的分离纯化中具有广泛的应用。
Nanoporous membranes with superior separation performance have become more crucial with increasing concerns in functional nanomaterials. Here novel ultrahigh permeable nanoporous membranes have been fabricated on macroporous supports by self-assembly of anionic polymer on copper hydroxide nanostrand templates in organic solution. This facile approach has a great potential for the fabrication of ultrathin anionic polymer membranes as a general method. The as-fabricated self-assembled membranes have a mean pore size of 5-12 nm and an adjustable thickness as low as 85 nm. They allow superfast permeation of water, and exhibit excellent size-selective separation properties and good fouling resistance for negatively-charged solutes during filtration. The 85 nm thick membrane has an ultrahigh water flux (3306 l m(-2) h(-1) bar(-1)) that is an order of magnitude larger than commercial membranes, and can highly efficiently separate 5 and 15 nm gold nanoparticles from their mixtures. The newly developed nanoporous membranes have a wide application in separation and purification of biomacromolecules and nanoparticles.