Journal
CHEMICAL ENGINEERING SCIENCE
Volume 122, Issue -, Pages 53-63Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ces.2014.09.015
Keywords
Plasma technology; PE hollow fiber membrane; Surface chemical engineering; Module scale-up; Hydrophilic stability
Categories
Funding
- Research Fund for the Doctoral Program of Higher Education of China [20131101130005]
- Beijing Natural Science Foundation [8112025]
- National Natural Science Foundation of China [20976012]
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The modification of PE hollow fibers in a module scale was carried out by long-distance and dynamic low temperature (LDDLT) plasma flow, which is an environment-friendly surface chemical engineering method. For the module with a plasma inlet diameter of 15 mm, contact angle variations along with fiber axial distance from plasma inlet revealed that the effective modification distance by LDDLT plasma flow was easily scaled up to about 80 cm for purpose of industrial applications. The plasma treated membrane module (PTMM) exhibited not only good chemical resistance in various solutions but also excellent antifouling property and hydrophilic stability. Moreover, the PTMM, which was dried at 25 degrees C in vacuum after each filtration cycle, could still maintain high hydrophilicity after 7 water filtration cycles and storing over 90 days. Its average contact angle recovered by only 7 degrees, and the steady water flux was about 30 Lm(-2) h(-1), far higher than the untreated ones. (C) 2014 Elsevier Ltd. All rights reserved.
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