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In relation to this article, we declare that there is no conflict of interest.
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Received May 9, 2015
Accepted August 31, 2015
articles This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
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Effect of CO2-laser irradiation on properties and performance of thin-film composite polyamide reverse osmosis membrane

1Department of Chemical and Petroleum Engineering, Sharif University of Technology, Azadi Ave., Tehran, Iran 2Sharif Membrane Research and Technology Center, Sharif University of Technology, Azadi Ave., Tehran, Iran 3Faculty of Chemistry, Kharazmi (Tarbiat Moallem) University, Tehran, Iran 4Laser and Plasma Research Institute, Shahid Beheshti University, Evin, Tehran, Iran
musavi@sharif.edu
Korean Journal of Chemical Engineering, March 2016, 33(3), 1028-1036(9), 10.1007/s11814-015-0193-9
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Abstract

CO2-laser irradiation was used to modify the surface properties of thin-film composite (TFC) polyamide reverse osmosis (RO) membranes. These membranes were first synthesized via interfacial polymerization of m-phenylenediamine (MPD) monomers and trimesoyl chloride (TMC) over porous polysulfone ultrafiltration support, followed by a CO2-irradiation. AFM, ATR-FTIR, SEM and contact angle measurements were used to characterize the surface properties of these membranes. The ATR-FTIR results indicated that CO2-laser irradiation did not induce any functional groups on the membrane surface. However, it was found that the laser irradiation enhanced the NaCl salt rejection and slightly reduced the permeate flux. Moreover, the maintenance of the flux in modified membranes was much higher than untreated ones. Specially, after 180 min of filtration, the reduction in initial flux for the unmodified membranes was 22%. However, the reduction in initial flux for the modified membranes was less than 5%. Bovine serum albumin (BSA) filtration revealed an improvement in the antifouling properties of the modified membranes. The changes in the membrane surface morphology showed that the roughness of membrane surface is reduced significantly.

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