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Ultrathin Single Bilayer Separation Membranes Based on Hyperbranched Sulfonated Poly(aryleneoxindole)
Author(s) -
Joseph Nithya,
Thomas Joice,
Ahmadiannamini Pejman,
Van Gorp Hans,
Bernstein Roy,
De Feyter Steven,
Smet Mario,
Dehaen Wim,
Hoogenboom Richard,
Vankelecom Ivo F. J.
Publication year - 2017
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201605068
Subject(s) - polyelectrolyte , membrane , materials science , bilayer , nanofiltration , chemical engineering , layer by layer , layer (electronics) , filtration (mathematics) , fabrication , polymer chemistry , nanotechnology , polymer , composite material , chemistry , medicine , biochemistry , statistics , mathematics , alternative medicine , pathology , engineering
The layer‐by‐layer method is an attractive technique for the fabrication of ultrathin nanostructured polyelectrolyte multilayer membranes (PEMM). A simple two‐step procedure is described here for the preparation of an ultrathin, nanostructured membrane comprising a 5–7 nm thick selective layer, consisting only of one single bilayer of poly(diallyldimethylammoniumchloride) and hyperbranched sulfonated poly(aryleneoxindole). These single bilayered membranes exhibit an outstanding solvent‐resistant nanofiltration performance, which is superior to that of commercial membranes as well as to previously reported multilayer membranes having 10–20 bilayers. A comparative study between hyperbranched polyelectrolyte (HPE) and linear polyelectrolyte supports the role of the specific 3D structure of the hyperbranched polyelectrolyte in these excellent separation properties. The work thus encompasses the use of HPEs as an ideal choice for PEMMs, which opens up a new route to significantly decrease the overall membrane preparation time while realizing excellent filtration properties.