• DOI:10.1039/c3nr03362g
• Corpus ID: 9568280

Ultrathin self-assembled anionic polymer membranes for superfast size-selective separation.

@article{Deng2013UltrathinSA,
  title={Ultrathin self-assembled anionic polymer membranes for superfast size-selective separation.},
  author={Chao Deng and Qiu Gen Zhang and Guang Lu Han and Yi Gong and Ai Mei Zhu and Qing Lin Liu},
  journal={Nanoscale},
  year={2013},
  volume={5 22},
  pages={
          11028-34
        }
}

• Chao Deng, Q. Zhang, +3 authors Q. Liu
• Published 25 October 2013
• Engineering, Materials Science, Chemistry
• Nanoscale

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.