화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.18, No.4, 1398-1405, July, 2012
DOI10.1016/j.jiec.2012.01.041  Export Citation
Synthesis and characterization of PVA/PES thin film composite nanofiltration membrane modified with TiO2 nanoparticles for better performance and surface properties
Sarah Pourjafar, Ahmad Rahimpour, and Mohsen Jahanshahi†
  • Nanotechnology Research Institute, School of Chemical Engineering, Babol University of Technology, Babol, Iran
E-mail:
Novel polyethersulfone (PES)/poly (vinyl alcohol) (PVA)/titanium dioxide (TiO2) composite nanofiltration membranes were prepared by dip-coating of PES membrane in PVA and TiO2 nanoparticles aqueous solution. Glutaraldehyde (GA) was used as a cross-linker for the composite polymer membrane in order to enhance the chemical, thermal as well as mechanical stabilities. TiO2 nanoparticles with different concentrations (0, 0.05, 0.1, 0.5 wt.%) were coated on the surface of PVA/PES composite membrane. The morphological study was investigated by atomic force microscopy(AFM), scanning surface microscopy (SEM) and along with X-ray diffraction (XRD). In addition, the membranes performances, in terms of permeate flux, ion rejection and swelling factor were also investigated. It was found that the increase in TiO2 solution concentration can highly affect the surface morphology and filtration performance of coated membranes. The contact angle measurement and XRD studies indicated that the TiO2 nanoparticles successfully were coated on the surface of PVA/PES composite membranes. However, rougher surface was obtained for membranes by TiO2 coating. The filtration performance data showed that the 0.1 wt.% TiO2-modified membrane presents higher performance in terms of flux and NaCl salt rejection. Finally, TiO2 modified membranes demonstrated the lower degree of swelling.
Keywords:Nanofiltration;PVA/PES composite membrane;Modification;TiO2 nanoparticles
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