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Synthesis of spherical polyelectrolyte brushes by photoemulsion polymerization with different photoinitiators / Xiang Wang in Industrial & engineering chemistry research, Vol. 50 N° 6 (Mars 2011) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3564–3569 Titre : Synthesis of spherical polyelectrolyte brushes by photoemulsion polymerization with different photoinitiators Type de document : texte imprimé Auteurs : Xiang Wang, Auteur ; Shuang Wu, Auteur ; Li, Li, Auteur Année de publication : 2011 Article en page(s) : pp. 3564–3569 Note générale : Chimie industrielle Langues : Anglais (eng) Mots-clés : kinetics  Photoemulsion  Polymerization Résumé : Nanosized spherical polyelectrolyte brushes (SPBs) with tunable size and grafting density were synthesized successfully by photoemulsion polymerization using three photoinitiators. Due to their difference in structure, UV absorption, and mechanism of photoinitiation, the kinetics of photoemulsion polymerization using these respective photoinitiators are different. The grafting densities of poly(acrylic acid) (PAA) brushes varied from 0.012 to 0.081 nm−2 by using different photoinitiators, as determined by cutting off the PAA chains from the core particles. All of the spherical PAA brushes prepared by these three photoinitiators are pH and ionic strength sensitive as demonstrated by DLS measurements. Well-defined spherical morphology with narrow size distribution for all of the brushes prepared has been observed by FESEM. This work opens a new way to control the synthesis of SPBs with tunable structure for potential applications in catalysis, wastewater treatment, disease diagnosis, and protein immobilization. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101764s [article] Synthesis of spherical polyelectrolyte brushes by photoemulsion polymerization with different photoinitiators [texte imprimé] / Xiang Wang, Auteur ; Shuang Wu, Auteur ; Li, Li, Auteur . - 2011 . - pp. 3564–3569. Chimie industrielle Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 50 N° 6 (Mars 2011) . - pp. 3564–3569 Mots-clés : kinetics  Photoemulsion  Polymerization Résumé : Nanosized spherical polyelectrolyte brushes (SPBs) with tunable size and grafting density were synthesized successfully by photoemulsion polymerization using three photoinitiators. Due to their difference in structure, UV absorption, and mechanism of photoinitiation, the kinetics of photoemulsion polymerization using these respective photoinitiators are different. The grafting densities of poly(acrylic acid) (PAA) brushes varied from 0.012 to 0.081 nm−2 by using different photoinitiators, as determined by cutting off the PAA chains from the core particles. All of the spherical PAA brushes prepared by these three photoinitiators are pH and ionic strength sensitive as demonstrated by DLS measurements. Well-defined spherical morphology with narrow size distribution for all of the brushes prepared has been observed by FESEM. This work opens a new way to control the synthesis of SPBs with tunable structure for potential applications in catalysis, wastewater treatment, disease diagnosis, and protein immobilization. DEWEY : 660 ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie101764s