Abstract
Novel high‐flux and fouling‐resistant pervaporation membranes were synthesized. The nano‐SiO2/polyurethane acrylate (NPUSA) membrane was prepared by 2,4‐toluene diisocyanate, hydroxy alkyl silicone oil (Tech‐2120), and hydroxyethyl acrylate and cross‐linked with the monomer pentaerythritol triacrylate (PETA) by UV curing technology. Nano‐SiO2, which has a large amount of hydroxyl groups that can make a reaction with the isocyanato (NCO), was used as a cross‐linking agent as well as an inorganic silicone precursor to generate an inorganic network. An inorganic organosiloxane network (SiOSi) was generated in the membrane by the electrophilic addition of carbamate between hydroxyl groups and isocyanato. The impact of nano‐SiO2 to NPUSA membrane was investigated using Fourier transform infrared spectrometer (FTIR), gel permeation chromatography, thermal gravimetric analysis, and atomic force microscopy (AFM). FTIR analysis confirmed the presence of the SiOSi network in the membrane, and AFM analysis confirmed the homogeneous distribution of this network throughout the membrane. The performance of NPUSA/PETA membrane was also compared with the commercially available membranes poly(vinyl alcohol)/poly(acrylonitrile) and polydimethylsiloxane and was found to be more resistant to compaction and with better permeability. Copyright © 2015 John Wiley & Sons, Ltd.
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