Towards Enhanced Performance Thin-film Composite Membranes via Surface Plasma Modification

Research output: Contribution to journalArticleScientificpeer-review

Researchers

  • Rackel Reis
  • Ludovic Francis Dumée
  • Blaise Tardy

  • Raymond Riley Dagastine
  • John D. Orbell
  • Jürg A. Schutz
  • Mikel C. Duke

Research units

  • Victoria University
  • Deakin University
  • University of Melbourne
  • CSIRO Manufacturing

Abstract

Advancing the design of thin-film composite membrane surfaces is one of the most promising pathways to deal with treating varying water qualities and increase their long-term stability and permeability. Although plasma technologies have been explored for surface modification of bulk micro and ultrafiltration membrane materials, the modification of thin film composite membranes is yet to be systematically investigated. Here, the performance of commercial thin-film composite desalination membranes has been significantly enhanced by rapid and facile, low pressure, argon plasma activation. Pressure driven water desalination tests showed that at low power density, flux was improved by 22% without compromising salt rejection. Various plasma durations and excitation powers have been systematically evaluated to assess the impact of plasma glow reactions on the physico-chemical properties of these materials associated with permeability. With increasing power density, plasma treatment enhanced the hydrophilicity of the surfaces, where water contact angles decreasing by 70% were strongly correlated with increased negative charge and smooth uniform surface morphology. These results highlight a versatile chemical modification technique for post-treatment of commercial membrane products that provides uniform morphology and chemically altered surface properties.

Details

Original languageEnglish
Article number29206
JournalScientific Reports
Volume6
Publication statusPublished - 1 Jul 2016
MoE publication typeA1 Journal article-refereed

ID: 12143942