Issue 7, 2018

Nanofilms directly formed on macro-porous substrates for molecular and ionic sieving

Abstract

Large-scale fabrication of nanofilms directly on macro-porous substrates remains a major challenge in preparing advanced separation membranes. In this work, polyphenol/polyamine nanofilms with a minimum thickness around 13 nm were formed at the gas/liquid interface and simultaneously composited onto hydrophobic macro-porous substrates with the pore size of several hundreds of nanometers, a process driven by high oxygen concentration and interfacial energy at the interface. The as-prepared nanofilms show nearly complete rejection to a wide spectrum of dye molecules, and above 90% rejection to divalent cations such as Mg2+ and Ca2+ with a relative high permeate flux above 15 L m−2 h−1 bar−1, demonstrating great potential in ionic and molecular sieving processes.

Graphical abstract: Nanofilms directly formed on macro-porous substrates for molecular and ionic sieving

Supplementary files

Article information

Article type
Communication
Submitted
28 Nov 2017
Accepted
23 Jan 2018
First published
25 Jan 2018

J. Mater. Chem. A, 2018,6, 2908-2913

Nanofilms directly formed on macro-porous substrates for molecular and ionic sieving

H. Yang, M. Wu, J. Hou, S. B. Darling and Z. Xu, J. Mater. Chem. A, 2018, 6, 2908 DOI: 10.1039/C7TA10438C

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