Investigation of a novel fluorinated surfactant-based system for the design of spherical wormhole-like mesoporous silica

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• 作者：Philippe Riachy^a ; Gé ; rald Lopez^b ; Mé ; lanie Emo^a ; Marie-José ; Sté ; bé ; ^a ; Jean-Luc Blin^a ; ^{Jean-Luc.Blin@univ-lorraine.fr" class="auth_mail" title="E-mail the corresponding author} ; Bruno Ameduri^b ; ^{bruno.ameduri@enscm.fr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：2-Trifluoromethyl acrylic acid ; Fluorinated surfactant ; Micelles structure ; Mesoporous materials ; Silica spheres
• 刊名：Journal of Colloid and Interface Science
• 出版年：2017
• 出版时间：1 February 2017
• 年：2017
• 卷：487
• 期：Complete
• 页码：310-319
• 全文大小：1859 K

文摘

In contrast to hydrogenated based systems that led to many studies, fluorinated surfactants have been little reported. Thanks to their high chemical and thermal stability, these compounds are considered as suitable candidates for the synthesis of porous materials with an enhanced hydrothermal stability. This study reports the synthesis of a new fluorinated surfactant, 2-trifluoromethyl-7,7,8,8,9,9,10,10,11,11,12,12,12-tridecafluoro-4-thia-1-dodecanoic acid (FSC) obtained from the thiol-ene radical addition of 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluoro-1-octanethiol onto 2-trifluoromethyl acrylic acid in 85% yield. In the aim of achieving micelles in water to design mesoporous materials according to the cooperative templating mechanism, FSC was modified with water-soluble telechelic diamine (Jeffamine) ED-600. The modified surfactant was deeply characterized by spectroscopic methods and the FSC-Jeffamine ED-600 micellar system was used as porogen to prepare mesoporous materials via the cooperative templating mechanism. Spherical wormhole-like mesostructured silica materials of high specific surface area (850 m²/g) and homogeneous pore size distribution (ca. 3.4 nm) were obtained by conveniently adjusting the porogen/silica molar ratio and the hydrothermal conditions.