Surface-modified reverse osmosis membranes applying a copolymer film to reduce adhesion of bacteria as a strategy for biofouling control

Matin, Asif, Khan, Z., Gleason, K. K., Khaled, Mazen, Zaidi, S. M. J., Khalil, Amjad, Moni, Priya and Yang, Rong (2014) Surface-modified reverse osmosis membranes applying a copolymer film to reduce adhesion of bacteria as a strategy for biofouling control. Separation and Purification Technology, 124 117-123. doi:10.1016/j.seppur.2013.12.032


Author Matin, Asif
Khan, Z.
Gleason, K. K.
Khaled, Mazen
Zaidi, S. M. J.
Khalil, Amjad
Moni, Priya
Yang, Rong
Title Surface-modified reverse osmosis membranes applying a copolymer film to reduce adhesion of bacteria as a strategy for biofouling control
Journal name Separation and Purification Technology   Check publisher's open access policy
ISSN 1383-5866
1873-3794
Publication date 2014-03-18
Year available 2014
Sub-type Article (original research)
DOI 10.1016/j.seppur.2013.12.032
Open Access Status
Volume 124
Start page 117
End page 123
Total pages 7
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon
Collection year 2015
Language eng
Formatted abstract
The hydrophilic hydroxyethyl methacrylate (HEMA) and the hydrophobic perfluoro decylacrylate (PFDA) were copolymerized and deposited on different substrates using an initiated chemical vapor deposition (iCVD) technique. By adjusting the relative flow rates of the two monomer gases, it was possible to control both the chemistry and thickness of the deposited films. Copolymers of different chemistries were first deposited on quartz crystals and the adsorption of a model polysaccharide, sodium alginate, was studied with the help of Quartz Crystal Microscopy (QCM). The copolymer film with amphiphilic chemistry showed considerably less foulant adsorption in comparison with the pure homopolymers i.e. PHEMA and PPFDA. The films were then deposited on commercial RO membranes and the modified surfaces characterized with AFM, CA and XPS. Resistance to bacterial adhesion was examined for the coated membranes by carrying out short-term batch studies with Escherichia coli cells. Among the different film chemistries, the membrane with the copolymer film of amphiphilic chemistry (∼40% PFA) showed the least microbial attachment. Bacterial adhesion tests were then repeated with the unmodified RO membrane and the membrane coated with the optimum chemistry. A quantitative analysis revealed that the presence of the amphiphilic copolymer film on the membrane results in a reduction of attached bacteria by about two orders of magnitude. To summarize, the surface modification of membranes with an initiated CVD technique presents a potentially effective strategy for the control of membrane biofouling.
Keyword Bacterial adhesion
Biofouling
Reverse osmosis
Surface modification
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Official 2015 Collection
Australian Institute for Bioengineering and Nanotechnology Publications
 
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