Abstract
Organic-inorganic polymer hybrids provide opportunities to tailor new materials for preparation of membranes with improved physico-mechanical and separation properties. This study deals with synthesizing of hybrid organic-inorganic poly(urethane-siloxane) membranes with built-in poly(ethylene glycol) (PEG) segments for CO2 separation. The membranes contain two different PEG content 55 and 71wt% based on the selected starting materials, PEG1000 and PEG2000, respectively. Inorganic siloxane (Si–O–Si) domains were created in the matrix of the membranes through a hydrolysis and condensation reaction. Presence of these inorganic domains improved thermal, mechanical and also separation properties. Separation performance of the poly(urethane-siloxane) membrane with PEG content of 71wt% was completely promising, PCO2 = 104 Barrer, PCO2/PCH4 = 20.8, and PCO2/PH2 = 6.9 at 400kPa and 308K.
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