Improvement of antibiofouling performance of a reverse osmosis membrane through biocide release and adhesion resistance

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• 作者：Hamed Karkhanechi ; Fachrul Razi ; Isao Sawada ; Ryosuke Takagi ; Yoshikage Ohmukai ; Hideto Matsuyama ; ^{matuyama@kobe-u.ac.jp}
• 关键词：RO membrane ; Antibiofouling ; Silver nanoparticles ; Polyzwitterion
• 刊名：Separation and Purification Technology
• 出版年：2013
• 出版时间：5 February, 2013
• 年：2013
• 卷：105
• 期：Complete
• 页码：106-113
• 全文大小：1066 K

文摘

To improve antibiofouling properties, a commercial reverse osmosis (RO) membrane was modified by surface deposition of a polyelectrolyte multilayers (PEMs) embedded with silver nanoparticles. The modified membrane was further coated with an amphiphilic polyzwitterion, a 2-methacryloyloxyethyl phosphorylcholine (MPC) copolymer with 2-aminoethyl methacrylate (AEMA). Thus, the modified surface layer consisted of PEMs embedded with silver nanoparticles and polyzwitterion as a top layer. Embedding of silver nanoparticles and polyzwitterion coating were confirmed by transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). The effectiveness of biocide release from the modified membranes was evaluated with Pseudomonas putida (P. putida) and Escherichia coli (E. coli) and the anti-adhesion property was studied using P. putida. The silver nanoparticles embedded within PEMs showed biocidal property because of silver ion release, and polyzwitterion at the top layer showed high anti-adhesion properties because of the high hydrophilicity of surface. Thus, the membrane modified by PEMs embedded with silver nanoparticles and polyzwitterion as a top layer showed a high antibiofouling properties, attributed to the combined effect of biocide release and adhesion resistance.