Preparation of Nanocomposites Based on PVA Hydrogel with CNT Via Gamma Irradiation

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Sharifi, Meisam | 2013

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Type of Document: M.Sc. Thesis
Language: Farsi
Document No: 45229 (06)
University: Sharif University of Technology
Department: Chemical and Petroleum Engineering
Advisor(s): Frounchi, Masoud; Dadbin, Susan
Abstract:
Polyvinylalcohol/MWCNT nanocomposite films were fabricated via solution casting method. Glycerol was added to the polymer matrix as plasticizer in order to improve the flexibility and toughness of resultant films. Surface modification of MWCNTs were carried out by subjecting to gamma irradiation of 60Co source to total doses of 50.0 and 75 kGy in pure ethanol and in a solution with equal volume fraction of water and ethanol. The produced nanocomposites in each case which contain different type of modified MWCNTs were characterized by x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), mechanical and electrical measurements. The nanoparticles were observed to be uniformly dispersed in the polymer matrix due to strong interaction between themselves and the polymer matrix, arising from the bonding between the PVA and functional groups on the nanoparticle surfaces. We also prepared hydrogels using the 60Co γ-ray irradiation technique and examined the physical properties of these hydrogels, including gelation and equilibrium water content
Keywords:
Nanocomposite ; Carbon Nanotubes ; Poly Vinyl Alcohol ; Gamma Irradiation ; Hydrogel

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