Preparation, characterization and gas permeation properties of a polycaprolactone based polyurethane-silica nanocomposite membrane
作者： Morteza Sadeghi , Mohammad Mehdi Talakesh , Behnam Ghalei , Mohammadreza Shafiei
DOI: 10.1016/J.MEMSCI.2012.07.036
关键词: Gas separation 、 Nanocomposite 、 Polycaprolactone 、 Permeation 、 Thermogravimetric analysis 、 Polymer chemistry 、 Fourier transform infrared spectroscopy 、 Chemical engineering 、 Materials science 、 Polyurethane 、 Membrane
摘要: Abstract The effect of silica nanoparticles on the gas permeation properties polycaprolactone-based polyurethane membranes was investigated. Polyurethane and polyurethane-silica nanocomposite were prepared by solution blending casting-evaporation methods. Silica sol–gel method using hydrolysis tetraethoxysilane (TEOS). synthesized bulk two-step polymerization, including polycaprolactone 2000(PCL)/hexamethylene diisocyanate (HMDI)/1,4-butanediol (BDO). homogeneity nano scale distribution characterized Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) thermal gravimetric analysis (TGA). Gas these with different contents, studied for pure CO 2 , CH 4 N O gases. results showed reduction in permeability, but enhancement /N /CH ideal selectivity. Also temperature pressure modified Higuchi model applied to predict permeability membranes. Good agreement between experimental data predicted obtained.
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