Journal
DESALINATION
Volume 330, Issue -, Pages 49-60Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.desal.2013.09.022
Keywords
PVDF; PAN; DMA; Reinforced; Fouling resistance
Categories
Funding
- National Basic Research Development Program of China (973 Program) [2012CB722706]
- National Natural Science Foundation of China [51073120, 21274109]
- Science and Technology Plans of Tianjin [12JCZDJC26600]
- Basic Research Program of China National Textile and Apparel Council
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Reinforced polyvinylidene fluoride (PVDF) and polyacrylonitrile (PAN) hollow fiber membranes were prepared through dry-wet spinning process and included PVDF or PAN polymer solutions (coating layer) and matrix PVDF membrane. The performance of the membranes varies with different polymer solutions and is characterized in terms of ink solution and activated sludge flux, dynamic mechanical analysis (DMA), mean pore size, a mechanical strength test, and morphology observations by a scanning electron microscope (SEM). The results of this study indicate that PAN coating layer is easy to peel off from the matrix membrane. Interfacial bonding strength is also detected by dynamic mechanical analysis indirectly. The reinforced membranes show a narrower pore size distribution and smaller mean pore size than the matrix membrane. The elongation at break increases much more and the membranes are endowed with better flexibility performance. The homogeneous-reinforced (HMR) and heterogeneous-reinforced (HTR) membranes have a lower rate of flux decline compared with matrix membrane during ink solution filtration. The main types of all membranes fouling in microfiltration of ink solution were attributed to initial pore blocking followed by cake formation. Then, in the activated sludge solution, the reinforced membranes have stable efficiency in antifouling property for the real MBR system. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
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