Surface Modification of Polyethersulfone (PES) with UV Photo-Oxidation

Cisse, Ibrahim and Oakes, Sarah and Sachdev, Shreen and Toro, Marc and Lutondo, Shin and Shedden, Devon and Atkinson, Kristen Margaret and Shertok, Joel and Mehan, Michael and Gupta, Surendra K. and Takacs, Gerald A. (2021) Surface Modification of Polyethersulfone (PES) with UV Photo-Oxidation. Technologies, 9 (2). p. 36. ISSN 2227-7080

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Abstract

Polyethersulfone (PES) films are widely employed in the construction of membranes where there is a desire to make the surface more hydrophilic. Therefore, UV photo-oxidation was studied in order to oxidize the surface of PES and increase hydrophilicity. UV photo-oxidation using low pressure mercury lamps emitting both 253.7 and 184.9 nm radiation were compared with only 253.7 nm photons. The modified surfaces were characterized using X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and water contact angle (WCA) measurements. Both sets of lamps gave similar results, showing an increase of the oxygen concentration up to a saturation level of ca. 29 at.% and a decrease in the WCA, i.e., an increase in hydrophilicity, down to ca. 40°. XPS detected a decrease of sp2 C-C aromatic group bonding and an increase in the formation of C-O, C=O, O=C-O, O=C-OH, O-(C=O)-O, and sulphonate and sulphate moieties. Since little change in surface roughness was observed by AFM, the oxidation of the surface caused the increase in hydrophilicity.

Item Type: Article
Subjects: Open Archive Press > Multidisciplinary
Depositing User: Unnamed user with email support@openarchivepress.com
Date Deposited: 31 Mar 2023 05:41
Last Modified: 05 Jul 2024 08:45
URI: http://library.2pressrelease.co.in/id/eprint/799

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