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Preparation and characterization of a robust and hydrophobic ceramic membrane via an improved surface grafting technique / Chiao Chien Wei in Industrial & engineering chemistry research, Vol. 48 N° 7 (Avril 2009) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3446–3452 Titre : Preparation and characterization of a robust and hydrophobic ceramic membrane via an improved surface grafting technique Type de document : texte imprimé Auteurs : Chiao Chien Wei, Auteur ; K. Li, Auteur Année de publication : 2009 Article en page(s) : pp. 3446–3452 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Hydrophobic  ceramic  membranes  Grafting  method  Roughness Résumé : Studies have shown that hydrophilic surfaces of ceramic membranes can be modified to be hydrophobic using a grafting method. In this study, a robust and hydrophobic ceramic hollow-fiber membrane was developed by introducing a pretreatment technique, followed by a grafting method. The contact angle of the grafted membranes using the pretreatment technique was approximately 140°, indicating that the hydrophilic membrane surfaces were successfully modified to be hydrophobic. The mean roughness and the root roughness of grafted membranes decreased from 41 to 27.6 nm and from 53.4 to 33.6 nm, respectively, indicating that the membrane was covered by a grafted layer. The mechanical strength of the membrane was retained after the grafting process, and the grafted membrane was found to be thermally stable up to 270 °C and chemically stable in hexane for 100 h. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801639d [article] Preparation and characterization of a robust and hydrophobic ceramic membrane via an improved surface grafting technique [texte imprimé] / Chiao Chien Wei, Auteur ; K. Li, Auteur . - 2009 . - pp. 3446–3452. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 48 N° 7 (Avril 2009) . - pp. 3446–3452 Mots-clés : Hydrophobic  ceramic  membranes  Grafting  method  Roughness Résumé : Studies have shown that hydrophilic surfaces of ceramic membranes can be modified to be hydrophobic using a grafting method. In this study, a robust and hydrophobic ceramic hollow-fiber membrane was developed by introducing a pretreatment technique, followed by a grafting method. The contact angle of the grafted membranes using the pretreatment technique was approximately 140°, indicating that the hydrophilic membrane surfaces were successfully modified to be hydrophobic. The mean roughness and the root roughness of grafted membranes decreased from 41 to 27.6 nm and from 53.4 to 33.6 nm, respectively, indicating that the membrane was covered by a grafted layer. The mechanical strength of the membrane was retained after the grafting process, and the grafted membrane was found to be thermally stable up to 270 °C and chemically stable in hexane for 100 h. En ligne : http://pubs.acs.org/doi/abs/10.1021/ie801639d