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Polysulfone/Vanillin Microcapsules Production Based on Vapor-Induced Phase Inversion Precipitation / Cinta Panisello in Industrial & engineering chemistry research, Vol. 51 N° 47 (Novembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 47 (Novembre 2012) . - pp. 15509–15516 Titre : Polysulfone/Vanillin Microcapsules Production Based on Vapor-Induced Phase Inversion Precipitation Type de document : texte imprimé Auteurs : Cinta Panisello, Auteur ; Ricard Garcia-Valls, Auteur Année de publication : 2013 Article en page(s) : pp. 15509–15516 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Microcapsules Résumé : Polysulfone microcapsules containing vanillin were previously prepared by using a method based on phase inversion by immersion precipitation. Liquid water was used as the nonsolvent. Characteristics of that product were promising but further research was required. This work aims to prepare similar capsules by using vapor water as nonsolvent (vapor-induced phase inversion precipitation). The precipitation technique effect on capsules morphology and performance was studied. The products were morphologically characterized and significant differences were found only in the cross-section structure: if liquid water was used, macrovoids appeared in the wall; whereas by using water vapor, sponge-like structures were obtained. Finally, vanillin release was characterized, and release trends were the same for both preparations. Thus, the proposed process allowed the obtainment of capsules with similar performance. In addition, the use of water vapor showed a reduction of water consumption during the preparation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302051a [article] Polysulfone/Vanillin Microcapsules Production Based on Vapor-Induced Phase Inversion Precipitation [texte imprimé] / Cinta Panisello, Auteur ; Ricard Garcia-Valls, Auteur . - 2013 . - pp. 15509–15516. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 47 (Novembre 2012) . - pp. 15509–15516 Mots-clés : Microcapsules Résumé : Polysulfone microcapsules containing vanillin were previously prepared by using a method based on phase inversion by immersion precipitation. Liquid water was used as the nonsolvent. Characteristics of that product were promising but further research was required. This work aims to prepare similar capsules by using vapor water as nonsolvent (vapor-induced phase inversion precipitation). The precipitation technique effect on capsules morphology and performance was studied. The products were morphologically characterized and significant differences were found only in the cross-section structure: if liquid water was used, macrovoids appeared in the wall; whereas by using water vapor, sponge-like structures were obtained. Finally, vanillin release was characterized, and release trends were the same for both preparations. Thus, the proposed process allowed the obtainment of capsules with similar performance. In addition, the use of water vapor showed a reduction of water consumption during the preparation. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie302051a