Deakin University
Browse

File(s) under permanent embargo

Plasma-induced physicochemical effects on a poly(amide) thin-film composite membrane

Version 2 2024-06-03, 08:21
Version 1 2017-04-04, 15:40
journal contribution
posted on 2024-06-03, 08:21 authored by R Reis, LF Dumée, A Merenda, JD Orbell, JA Schütz, MC Duke
Helium and water gas plasma were used to modify the surface morphology and chemistry of commercial thin film composite membranes. Such surface treatment is a convenient tool to alter performance of the membranes and subsequently reduce interactions with contaminants in solution. Plasma reactions such as etching and re-deposition resulted in surface functionalization and texturation which were correlated with membrane flux and salt rejecti on changes. Investigations conducted using atomic force microscopy revealed morphology alterations which were apparent as either smoother surfaces or rougher surfaces. While the smoothing was attributed to a re-deposition of polymer material, which originated most likely from vaporization of surface polymer, the roughening was a result from balanced plasma surface reactions. The beneficial etching can occur under certain conditions when helium is used in conjunction with low excitation power, which resulted in flux enhancements up to 66% (i.e. from 30 L.m − 2 .h − 1 to 50 L.m − 2 .h − 1 ) with 98% rejection. The hydrophilicity was dramatically increased from 46.6° to as low as 8.9° after 5 min of helium plasma duration. The impact that plasma treatments have on the nascent structure was discussed in order to highlight its application as a convenient tool to functionalize the surface of thin film composite membranes.

History

Journal

Desalination

Volume

403

Pagination

3-11

Location

Amsterdam, The Netherlands

ISSN

0011-9164

eISSN

1873-4464

Language

English

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2016, Elsevier

Publisher

ELSEVIER