Grafting of Polyacrylonitrile onto Luffa Cylindrica via in-situ Polymerization
Volume Title: 1
Faculty of Chemical Engineering, Urmia University of Technology, Urmia, Iran
In this study, to develop new polymeric materials for cellulose-based environmental applications, graft copolymerization of acrylonitrile (AN) monomer on chemically modified luffa cylindrica (LC) fibers have been studied. LC fibers were modified by scouring and alkaline treatment to partially remove the lignin, hemicelluloses, and other residues from the fibers' surface. The modified LC was silylated by using 3-(trimethoxysilyl)propyl methacrylate (MPS). Polyacrylonitrile was chemically grafted onto the cellulosic material surface by solution polymerization of AN with MPS-modified LC fibers. The grafted LC fibers were characterized by fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analyses. The grafting of polyacrylonitrile onto LC fibers was confirmed by appearance of a new peak at 2240 cm-1 corresponding to nitrile group (C≡N) and reduction of crystallinity index of fibers after copolymerization.