Article history: Surface hydrophilic modiﬁcation of polymer ultraﬁltration membrane using metal oxide represents an Received 13 August 2015 effective yet highly challenging solution to improve water ﬂux and antifouling performance. Via plasma- Received in revised form 15 October 2015 enhanced graft of poly acryl acid (PAA) prior to coating TiO , we successfully ﬁxed TiO functional thin 2 2 Accepted 6 November 2015 layer on super hydrophobic polytetraﬂuoroethylene (PTFE) ultraﬁltration (UF) membranes. The char- Available online 12 November 2015 acterization results evidenced TiO attached on the PTFE-based UF membranes through the chelating 4+ bidentate coordination between surface-grafted carboxyl group and Ti . The TiO surface modiﬁcation Keywords: ◦ ◦ may greatly reduce the water contact angle from 115.8 of the PTFE membrane to 35.0 without degra- Ultraﬁltration dation in 30-day continuous ﬁltration operations. The novel TiO /PAA/PTFE membranes also exhibited Polytetraﬂuoroethylene membrane excellent antifouling and self-cleaning performance due to the intrinsic hydrophilicity and photocata- Titanium dioxide (TiO ) lysis properties of TiO , which was further conﬁrmed by the photo-degradation of MB under Xe lamp Plasma-induced graft polymerization 2 irradiation. © 2015 Elsevier B.V. All rights reserved. 1. Introduction Surface hydrophilic modiﬁcation presents a viable solution to apply PTFE
Applied Surface Science – Elsevier
Published: Jan 1, 2016
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