By a News Reporter-Staff News Editor at Science Letter -- Data detailed on Materials Science and Physical Chemistry have been presented. According to news reporting originating from Tokyo, Japan, by NewsRx correspondents, research stated, "Stable biofouling resistance is significant for general filtration requirements, especially for the improvement of membrane lifetime. A systematic group of hyper-brush PEGylated diblock copolymers containing poly(ethylene glycol) methacrylate (PEGMA) and polystyrene (PS) was synthesized using an atom transfer radical polymerization (ATRP) method and varying PEGMA lengths."
Our news editors obtained a quote from the research from the University of Tokyo, "This study demonstrates the antibiofouling membrane surfaces by self-assembled anchoring PEGylated diblock copolymers of PS-b-PEGMA on the microporous poly(vinylidene fluoride) (PVDF) membrane. Two types of copolymers are used to modify the PVDF surface, one with different PS/PEGMA molar ratios in a range from 0.3 to 2.7 but the same PS molecular weights (MWs, similar to 5.7 kDa), the other with different copolymer MWs (similar to 11.4, 19.9, and 34.1 kDa) but the similar PS/PEGMA ratio (similar to 1.7 +/- 0.2). It was found that the adsorption capacities of diblock copolymers on PVDF membranes decreased as molar mass ratios of PS/PEGMA ratio reduced or molecular weights of PS-b-PEGMA increased because of steric hindrance. The increase in styrene content in copolymer enhanced the stability of polymer anchoring on the membrane, and the increase in PEGMA content enhanced the protein resistance of membranes. The optimum PS/PEGMA ratio was found to be in the range between 1.5 and 2.0 with copolymer MWs above 20.0 kDa for the ultrastable resistance of protein adsorption on the PEGylated PVDF membranes."
According to the news editors, the research concluded: "The PVDF membrane coated with such a diblock copolymer owned excellent biofouling resistance to proteins of BSA and lysozyme as well as bacterium of Escherichia coli and Staphylococcus epidermidis and high stable microfiltration operated with domestic wastewater solution in a membrane bioreactor."
For more information on this research see: Surface Self-Assembled PEGylation of Fluoro-Based PVDF Membranes via Hydrophobic-Driven Copolymer Anchoring for Ultra-Stable Biofouling Resistance. Langmuir, 2013;29(32):10183-10193. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)
The news editors report that additional information may be obtained by contacting N.J. Lin, University of Tokyo, Dept. of Urban Engn, Center Environm Sci, Bunkyo Ku, Tokyo 1138656, Japan. Additional authors for this research include H.S. Yang, Y. Chang, K.L. Tung, W.H. Chen, H.W. Cheng, S.W. Hsiao, P. Aimar, K. Yamamoto and J.Y. Lai (see also Materials Science and Physical Chemistry).
Keywords for this news article include: Asia, Tokyo, Japan, Materials Science and Physical Chemistry
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC