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        Development and performance characteristics of silane crosslinked poly(vinyl alcohol)/chitosan membranes for reverse osmosis

        M. Shafiq,A. Sabir,A. Islam,S.M. Khan,S.N. Hussain,M.T.Z. Z. Butt,T. Jamil 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.48 No.-

        Novel thinfilm poly(vinyl alcohol)/chitosan (PVA/CS) based reverse osmosis membranes infused withsilane crosslinked tetraethylorthosilicate (TEOS) were prepared by dissolution casting methodology. Theperformance characteristics and the scope of the reverse osmosis membranes were explicated by Fouriertransform infrared spectroscopy (FTIR), thermogravimetric analyzer (TGA), differential scanningcalorimetery (DSC), scanning electron microscopy (SEM), contact angle, X-ray diffraction (XRD) andreverse osmosis (RO) permeation tests which determined the functional groups and network of covalentcrosslinks, thermal properties, morphology, hydrophilicity, structural investigation and RO properties,respectively. It was found that the membrane surface became smoother, more hydrophilic, withimproved thermal stability, increased salt rejection and good permeationflux after the appropriateinfusion of TEOS. The crosslinked membranes showed more hydrophilicity compared to theuncrosslinked PVCS membrane. The SEM micrographs of membranes revealed dense structure withno mottled surfaces. PVCS-4 showed an optimalflux of 1.84 L/m2h and 80% salt rejection that confirmedthe selective interaction of TEOS molecules with PVA/CS polymer backbone compared to the pristine(PVCS) membrane. The antibacterial properties of the membranes showed the inhibition of the growth ofEscherichia coli successfully.

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