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BA20313487v497pp109-116AuthorVer.pdf著者最終稿591.02 kBAdobe PDF公開予定日: 2018-05-20
タイトル: Structural Study on Aggregation Behavior of Star-type Trimeric Surfactant in the presence of Sodium Salicylate
著者: Kusano, Takumi; Akutsu, Kazuhiro; Iwase, Hiroki link image; Yoshimura, Tomokazu link image; Shibayama, Mitsuhiro link image
著者(別表記) : 草野, 巧巳; 阿久津, 和宏; 岩瀬, 裕希; 吉村, 倫一; 柴山, 充弘
著者読み: くさの, たくみ; あくつ, かずひろ; いわせ, ひろき; よしむら, ともかず; しばやま, みつひろ
キーワード: Trimeric surfactant; Sodium salicylate; Small-angle X-ray scattering; Rheology; Sphere-to-rod transition; Micelle-to-vesicle transition
発行日: 2016年 5月20日
出版者: Elsevier B.V.
引用: Takumi Kusano, Kazuhiro Akutsu, Hiroki Iwase, Tomokazu Yoshimura, Mitsuhiro Shibayama : Colloids and Surfaces A: Physicochemical and Engineering Aspects Volume 497, pp.109–116
抄録: •3C_12trisQ aggregates in NaSal solution were studied by SAXS and rheological measurements. •3C_12trisQ aggregates evolved from wormlike micelles to MLVs with increasing the C_S. •The structural transitions of the 3C_12trisQ aggregates strongly depended on both C_S and C_D. -------------------------------------------------We investigated the aggregation behavior of star-type trimeric surfactants (3C_12trisQ) with a hydrocarbon chain length (n) of 12 in sodium salicylate (NaSal) aqueous solution at various surfactant (C_D) and salt concentrations (C_S) using small-angle X-ray scattering (SAXS) and rheological measurements. At a low surfactant concentration (C_D = 7 mM), 3C_12trisQ aggregates in solution evolved from ellipsoidal micelles, to rodlike or wormlike micelles and finally to multi-lamellar vesicles (MLVs) with increasing C_S. In contrast, at higher surfactant concentrations (C_D = 14 and 28 mM), we did not observe vesicle formations of 3C_12trisQ because 3C_12trisQ were insoluble in solution at higher NaSal concentrations. The structural transitions of the 3_C12trisQ aggregates strongly depended on both CS and CD. We also compared the MLV structure formed by 3C_12trisQ with that formed by gemini-type surfactants (12-2-12). The repeat distance of the 3C_12trisQ MLV (33.95 Å) was remarkably larger than that of the 12-2-12 (22.36 Å). We found that introducing spacer chains, i.e., from dimeric to trimeric surfactants, caused a decrease in NaSal concentrations at which micelle-to-vesicle transitions were observed.
記述: 本論文の著作権はElsevier B.V.社が保有している。著者最終稿については、出版後24カ月経過した2018年5月20日に公開される。
???metadata.dc.relation.doi???: http://dx.doi.org/10.1016/j.colsurfa.2016.02.041
URI: http://hdl.handle.net/10935/4407
ISSN: 0927-7757
出現コレクション:雑誌

このアイテムの引用には次の識別子を使用してください: http://hdl.handle.net/10935/4407

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