Abstract
In this study, TiO2 nanoparticles were functionalized by grafting polymerization of methoxy poly(ethylene glycol) methacrylate (MPEG) onto the nanoparticle surface. Functionalized TiO2 nanoparticle was used as nanofiller to prepare poly(vinyl alcohol) (PVA) based nanocomposite (NC) membranes through solution mixing method. The thermal and mechanical properties of PVA/PMPEG-TiO2 membranes were improved compared to pristine PVA membrane due to well dispersion and high compatibility between the inorganic fillers and the polymer matrix. Gas permeation and selectivity properties of PVA/PMPEG-TiO2 NC membranes with various TiO2 contents were also studied for O2, N2, CH4 and CO2. Gas permeability improvement was seen for studied gases, especially for CO2. In addition, the results showed higher CO2/N2 selectivity up to 49.36% for 3 wt% TiO2 containing NC membranes.
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