Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 550205
Title Molecular separation using poly (styrene-co-maleic anhydride) grafted to γ-alumina : Surface versus pore modification
Author(s) Amirilargani, Mohammad; Merlet, Renaud B.; Chu, Liangyong; Nijmeijer, Arian; Winnubst, Louis; Smet, Louis C.P.M. de; Sudhölter, Ernst J.R.
Source Journal of Membrane Science 582 (2019). - ISSN 0376-7388 - p. 298 - 306.
Department(s) Organic Chemistry
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Alumina membrane - Copolymer grafting - Molecular separation - Pore modification - Surface modification

Here, we report the covalent coupling of poly (styrene-co-maleic anhydride) onto γ-alumina to develop high-performance organic solvent nanofiltration (OSN) membranes. A high molecular weight (M w ) alternating copolymer of maleic anhydride (MA) and styrene (St) was synthesized and directly grafted to the γ-alumina membrane, while commercially available low M w random copolymers of St and MA were also investigated. We show that solute rejection and membrane permeability strongly depend on the nature of the applied copolymer. In particular, the M w of the copolymer applied is potentially the key for improving the membrane performance. When a high M w copolymer was applied, the grafted layer covered the surface of the membrane. This results in membranes with significantly improved rejection, while maintaining a high permeability. In contrast, we observed pore grafting by applying low M w copolymers, which resulted in membranes with slightly higher rejection and dramatically lower permeability compared to unmodified membrane. The best results were obtained by grafting γ-alumina with a high M w alternating copolymer. These membranes showed a solute rejection of 98% for Sudan Black B (457 g mol −1 ) in toluene, while the permeability remained high at 2.9 L m −2 h −1 bar −1 .

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