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Polypropylene glycol / Zhuan Yi in Industrial & engineering chemistry research, Vol. 50 N° 19 (Octobre 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp 11297–11305 Titre : Polypropylene glycol : the hydrophilic phenomena in the modification of polyethersulfone membranes Type de document : texte imprimé Auteurs : Zhuan Yi, Auteur ; Liping Zhu, Auteur ; Youyi Xu, Auteur Année de publication : 2011 Article en page(s) : pp 11297–11305 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : Glycol  Polyethersulfone  membranes Résumé : In this work, the polypropylene glycol (PPG) was observed showing obvious hydrophilicity improvement to polyethersulfone (PES) membranes when it was introduced. The water contact angles of the blend membranes were significantly lowered to 50° when contents of PPG were 25 wt % in the as-formed membranes. The stability test presented a good durability of PPG when blend membranes suffered a 70 days water washing. Surface constitution analysis revealed that PPG concentration in the near surface was nearly two times higher than the theoretic value, indicating the surface enrichment of PPG in membranes. A pore-forming effect was also observed though the porosity increase was not obvious. The results of platelet adhesion, flux recovery, and protein adsorption indicated a nice fouling-resistance property of blend membranes. The molecular folding as well as the surface aggregation of PPG was explored as a reason for the hydrophilic improvement to blend membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201238c [article] Polypropylene glycol : the hydrophilic phenomena in the modification of polyethersulfone membranes [texte imprimé] / Zhuan Yi, Auteur ; Liping Zhu, Auteur ; Youyi Xu, Auteur . - 2011 . - pp 11297–11305. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 19 (Octobre 2011) . - pp 11297–11305 Mots-clés : Glycol  Polyethersulfone  membranes Résumé : In this work, the polypropylene glycol (PPG) was observed showing obvious hydrophilicity improvement to polyethersulfone (PES) membranes when it was introduced. The water contact angles of the blend membranes were significantly lowered to 50° when contents of PPG were 25 wt % in the as-formed membranes. The stability test presented a good durability of PPG when blend membranes suffered a 70 days water washing. Surface constitution analysis revealed that PPG concentration in the near surface was nearly two times higher than the theoretic value, indicating the surface enrichment of PPG in membranes. A pore-forming effect was also observed though the porosity increase was not obvious. The results of platelet adhesion, flux recovery, and protein adsorption indicated a nice fouling-resistance property of blend membranes. The molecular folding as well as the surface aggregation of PPG was explored as a reason for the hydrophilic improvement to blend membranes. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie201238c