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Aminosilane cross - linked PEG/PEPEG/PPEPG membranes for CO2/N2 and CO2/H2 separation / Hailin Cong in Industrial & engineering chemistry research, Vol. 49 N° 19 (Octobre 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) Titre : Aminosilane cross - linked PEG/PEPEG/PPEPG membranes for CO2/N2 and CO2/H2 separation Type de document : texte imprimé Auteurs : Hailin Cong, Auteur ; Bing Yu, Auteur Année de publication : 2010 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Aminosilane  Nanocomposite  membranes Résumé : Aminosilane-modified poly(ethylene glycol) (PEG), PEG-block-poly(propylene glycol) (PPG)-block-PEG (PEPEG), and PPG-block-PEG-block-PPG (PPEPG) diacrylate prepolymers are synthesized as new membrane materials for gas separation. By combining the in situ sol−gel process and cross-linking process together, the silane-modified prepolymers form flexible nanocomposite membranes with a maximum CO2 permeability of 274 barrer and CO2/N2 selectivity of about 30. The CO2 permeabilities of silane cross-linked PEPEG and PPEPG membranes are higher than those of silane cross-linked PEG membranes, whereas the CO2/N2 and CO2/H2 selectivities increase as the PEG content increases in the membrane. A proper aminosilane/prepolymer reaction ratio benefits the gas separation performance of the membrane due to the formation of different cross-linking structures and composites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1012568 [article] Aminosilane cross - linked PEG/PEPEG/PPEPG membranes for CO2/N2 and CO2/H2 separation [texte imprimé] / Hailin Cong, Auteur ; Bing Yu, Auteur . - 2010. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 19 (Octobre 2010) Mots-clés : Aminosilane  Nanocomposite  membranes Résumé : Aminosilane-modified poly(ethylene glycol) (PEG), PEG-block-poly(propylene glycol) (PPG)-block-PEG (PEPEG), and PPG-block-PEG-block-PPG (PPEPG) diacrylate prepolymers are synthesized as new membrane materials for gas separation. By combining the in situ sol−gel process and cross-linking process together, the silane-modified prepolymers form flexible nanocomposite membranes with a maximum CO2 permeability of 274 barrer and CO2/N2 selectivity of about 30. The CO2 permeabilities of silane cross-linked PEPEG and PPEPG membranes are higher than those of silane cross-linked PEG membranes, whereas the CO2/N2 and CO2/H2 selectivities increase as the PEG content increases in the membrane. A proper aminosilane/prepolymer reaction ratio benefits the gas separation performance of the membrane due to the formation of different cross-linking structures and composites. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie1012568