Environment friendly rubbery polyurethane membranes; preparation and fabrication of gas emission control for green textile industry

摘要

Diisocyants (-Isocyanato-1-(isocyanatomethyl)-1, 3,3-trimethylcyclohexane (IPDI)), polyols (Polycaprolactone) and chain extender (1-4butanodiol) were incorporated in preparation of polyurethane based membranes. The prepared membranes were characterized by Fourier Transform Infrared spectroscopy (FTIR), permeability and selectivity of prepared membranes was measured by gas permeation cell. The effect of Mw content of polycaprolactone (750, 1000, 1250, 1600 and 2000), feed pressure (0.1-0.4MPa), operating temperature (20-50SUPo/SUPC), and hard segment combination of (diiosocyante +chain extender) effect on transport property of COSUB2/SUB/CHSUB4/SUB and COSUB2/SUB/NSUB2/SUB selectivity were investigated. COSUB2/SUB/CHSUB4 /SUBgas mixture selectivity enhanced 46% in PUM15 (2000Mw) as compared to membrane sample PUM1 (750Mw) is 2.4% and COSUB2/SUB/NSUB2 /SUBselectivity is 51% in PUM15 (2000Mw) as compared to membrane sample PUM1 (750Mw) is 2.6%.The results revealed that PUM15 (Mw2000) display COSUB2 /SUBpermeability of 39.7 Barrer, higher than the PUM1 (750) is 4.3 Barrer. As the operating temperature increased from 20to 50SUPo/SUPC CHSUB4/SUB permeability increased about.9 to 8.6 Barrer for 750Mw (PUM11) and 2000Mw (PUM15) membranes samples. The correspondence decrease in the COSUB2/SUB/CHSUB4/SUB selectivity as compared to COSUB2/SUB/NSUB2/SUB is 46% and 51%. This is supported that high molecular weight polyurethane membrane are good COSUB2/SUB selective as compared to lower molecular weight polyurethane membranes. Because the heat trapping capabilities of this gas molecule into Environment may cause global warming.