Separation of Chlorine-Containing Organic Pollutants by Silicone-Polyurethane Interpenetrating Network Dense Membranes
Inks are widely used in material packaging,but solvent-based inks have the problem of polluting the environment and damaging human health with the release of volatile organic compounds (VOCs),such as 1,2-dichloroethane (DCE) in the process of usage.The use of separation membranes in the ink production process could effectively remove VOCs to generate green materials.Hexamethyldisiloxane (MM) was used as a capping agent,with γ-methacryloxypropyltrimethoxysiloxane (KH570) and ethyl orthosilicate (TEOS) by hydrolytic condensation to obtain organosilicone resin (MTQ).Silicone modified polyurethane resin (SiPUA) was prepared by isophorone diisocyanate (IPDI),hydroxypropyl polydimethylsiloxane and 2-hydroxyethyl acrylate (HEA),and then MTQ-SiPUA complex was synthesized by UV curing,and a novel interpenetrating network dense membranes was prepared using this complex.The structure and property of interpenetrating network dense membranes were characterized by infrared spectroscopy,X-ray diffraction and thermogravimetry.The MTQ-SiPUA-32.5% interpenetrating network dense membranes has excellent thermal stability and mechanical properties,with stable permeate fluxes to 1.33% dichloromethane (DCM),0.84% DCE,and 0.44% 1,1,2-trichloroethane (TCE),with 0.161,0.140,and 0.0715 kg/(m2·h) respectively,corresponding to selectivity of 952.5,2012.9 and 13255.8 respectively.
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