A new PVDF membrane grafted from fullerenes for possible application in membrane distillation process
Paper ID : 1160-MST2015-FULL
1Rasoul Rasoul Moradi, 2Javad Karimi-Sabet *, 3Mojtaba Shariaty-Niassarar
1a Transport Phenomena & Nanotechnology Lab., School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran.
2NFCRS, Nuclear Science and Technology Research Institute, Tehran, Iran
3Transport Phenomena & Nanotech. Lab, University College of Engineering, University of Tehran, Tehran, Iran
This work deals with the new surface engineering strategy for PVDF membrane. Due to PVDF non-reactivity, UV irradiation was used in order to activate the surface. Photo-treatment was performed in oxidative ozone atmosphere to induce easy surface modification and bond breaking. Fourier transform infrared (FTIR) studies of the UV-treated PVDF membrane indicate that with breaking of C-H and C-F bonds, epoxy and carbonyl functional groups forms on the PVDF surface which provides sufficient reactivity to get through various chemical reactions. Fullerene (C60) based molecules grafting to activate PVDF were done to achieve surface functionalized membranes. Prepared membranes were examined using various characterization techniques such as including scanning electron microscopy (SEM) and wettability tests. Membrane distillation (MD) experiments were conducted employing PVDF-g-C60 membranes and the relevant salt rejection performance as well as permeation fluxes were measured. Results indicate that there is not noticeable difference in the permeate fluxes and salt rejection efficiencies of PVDF and PVDF-g-C60 membranes. However, fullerene grafted membranes exhibit higher durability and fouling resistive properties.
PVDF surface engineering, Fullerene (C60), Membrane distillation (MD)
Status : Paper Accepted (Oral Presentation)