Journal
JOURNAL OF MEMBRANE SCIENCE
Volume 461, Issue -, Pages 123-129Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.memsci.2014.03.017
Keywords
Stimuli-responsive; Thin-film composite (TFC) membrane; Surface-initiated graft polymerization; Antifouling; Zvvitterionic polymer
Categories
Funding
- National Natural Science Foundation of China [21274108]
- National High Technology Research and Development Program of China [2012AA03A602]
Ask authors/readers for more resources
novel salt-responsive thin-film composite (TFC) reverse osmosis (RO) membrane was prepared by tethering a zwitterionic polymer poly (4-(2-sulloethyl) 1 (4 vinylbenzyl) pyridinium betaine) (PSVBP) onto a commercial RO membrane. The graft polymerization was conducted by surface-initiated free radical polymerization of SVBP initiated by a K2S2O8-NaHSO3 redox system. The membrane surface before and after graft polymerization was investigated in detail using ATR-FTIR, XPS, zeta potential, water contact angle and SEM. The change on surface chemical composition demonstrated successful grafting of PSVBP onto the RO membrane surface. The PSVBP grafting added negative charge onto the membrane surface and significantly improved membrane surface hydrophilicity. The RO test indicates that PSVBP grafting can increase the rejection from 98.0% to 99.7% with the trade-off 20% of the permeation flux. A cross-flow protein fouling test as long as 100 h indicates that the resulted PA-g-PSVBP membrane had superior antifouling property in the short term but lost the advantage for long-term operation. In spite of the long-term fouling, the PA-g-PSVBP membrane can restore 90% of the initial flux by rinsing with brine. The salt-responsive property of the PSVBP brush is believed to provide a driving force for the release of protein foulants. (c) 2014 Elsevier B.V. All rights reserved
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available