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Preparation and evaluation of hybrid organic-inorganic poly(urethane-siloxane) membranes with build-in poly(ethylene glycol) segments for efficient separation of CO2/CH4 and CO2/H2
- Gharibi, Reza, Ghadimi, Ali, Yeganeh, Hamid, Sadatnia, Behrouz, Gharedaghi, Mahvash
- Journal of membrane science 2018 v.548 pp. 572-582
- artificial membranes, carbon dioxide, composite polymers, condensation reactions, hydrogen, hydrolysis, methane, polyethylene glycol
- 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.