Synthesis of core-shell composites using an inverse surfmer

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• 作者：E. Armando Zaragoza-Contreras^a ; ^{armando.zaragoza@cimav.edu.mx} ; Margarita Stockton-Leal^a ; Claudia A. Hern&aacute ; ndez-Escobar^a ; Yusuke Hoshina^b ; Josu&eacute ; F. Guzm&aacute ; n-Lozano^b ; Takaomi Kobayashi^b
• 关键词：Conducting polymer ; Core&ndash ; shell composite ; Emulsion polymerization ; Oxidative polymerization ; Polyaniline ; Surfmer
• 刊名：Journal of Colloid and Interface Science
• 出版年：2012
• 出版时间：1 July, 2012
• 年：2012
• 卷：377
• 期：1
• 页码：231-236
• 全文大小：974 K

文摘

Anilinium dodecylsulfate was prepared from aniline and sodium dodecylsulfate. The critical micellar concentration of the salt was determined using electrical conductimetry, which revealed that the change of countercation, sodium by anilinium, reduced the critical micellar concentration with respect to the conventional counterpart, sodium dodecylsulfate. The anilinium dodecylsulfate was used as the surfmer in the synthesis of polystyrene/polyaniline core-shell composites, first performing as the surfactant to stabilize the emulsion polymerization of styrene, and later as the monomer to synthesize polyaniline via oxidative polymerization. Here, the surfmer function was directed toward the external phase instead of to the internal phase, as with conventional surfmers with carbon-carbon double bonds. Consequently, the term <em>inverse surfmerem> is proposed. Analyses of its composite microstructure using electron microscopy and thermogravimetric analysis confirmed the core-shell arrangement.