Journal
APPLIED SURFACE SCIENCE
Volume 396, Issue -, Pages 259-268Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2016.10.098
Keywords
Cellulose acetate; Nanofiltration composite membrane; Layer by layer assembly; Sepiolite
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Funding
- Department of Polymer Engineering and Technology, University of the Punjab
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Cellulose acetate (CA) incorporated with sepiolite and Polyvinylpyrrolidone (PVP) multilayer composite on Polysulfone (PSf) substrate have been prepared by layer by layer (LbL) assembly method. Fourier TransformInfrared Spectroscopy (FTIR) results verified the hydrogen bonding among the components of composite membrane. Atomic force microscopy (AFM), scanning electron microscope (SEM) was carried out for the determination and elucidation of roughness and morphology of the fabricated membranes on PSf substrate. The AFM and SEM results showed the increased surface roughness with the porous and spongy structure. The performance results verified that the successful incorporation of sepiolite in membranes showed maximum MgSO4 rejection (98.9%) and flux of 38.7 L/m(2) h. Whereas, in case of NaCl the rejection is 98.3% and flux is 34.9L/m(2) h. The modification was evidenced to be effective in increasing the surface hydrophilicity that led to increase in surface roughness. The chlorine resistivity is improved by dropping the active sites for chlorine attack and protecting the underlying PSf substrate. (C) 2016 Elsevier B.V. All rights reserved.
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