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Ultrafiltration membranes based on hybrids of an amphiphilic graft copolymer and titanium isopropoxide
Author(s) -
Park Min Su,
Park Byeong Ju,
Kim Na Un,
Park Jung Tae,
Kim Jong Hak
Publication year - 2018
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.45932
Subject(s) - permeance , ultrafiltration (renal) , contact angle , membrane , copolymer , materials science , chemical engineering , polymer chemistry , chemistry , composite material , chromatography , polymer , permeation , biochemistry , engineering
Graft copolymer poly(vinyl chloride)‐ g ‐poly(oxyethylene methacrylate) (PVC‐ g ‐POEM) is combined with titanium isopropoxide (TTIP) to form hybrids that undergo phase separation in a water bath. The water permeance of the PVC‐ g ‐POEM membrane increases by hybridization with TTIP owing to an increase in the surface pore size and porosity. Upon heating to 80 °C, the water permeances of PVC‐ g ‐POEM and PVC‐ g ‐POEM/TTIP decrease owing to the increased thickness of the top layer. However, the bovine serum albumin (BSA) rejection of PVC‐ g ‐POEM increases, while that of PVC‐ g ‐POEM/TTIP decreases. This is attributed to accelerated dissolution of TTIP at 80 °C, resulting in a large number of surface pores. The antifouling performance is significantly improved by TTIP addition and heating owing to increased hydrophilicity, as confirmed by contact angle, O/C atomic ratio, and water content measurements. The PVC‐ g ‐POEM/TTIP membrane prepared at 25 °C shows the best performance [338 L m −2 h −1 bar −1 (LMH) water permeance, 89.4% BSA rejection, and 91.9% flux ratio recovery]. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018 , 135 , 45932.