界面活性剤紐状ミセル水溶液の粘弾性挙動 -添加物の効果2-

概要

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The effects of additives in aqueous threadlike micellar systems formed with cetyltrimethylammonium bromide (CTAB) were studied by means of dynamic viscoelastic and 1H-NMR techniques. Additives were ionic aromatic compound, sodium p-toluenesulfonate (NapTS), and noionic ones / styrene (St) , and toluene (Tol). When a ratio (CS/CD) of the concentration of NapTS (CS) to the concentration of CTAB (CD) was 0.3, 0.4, and 0.5, the longest relaxation time (τm) became longer with increasing St (or Tol) concentration [St] (or [Tol]). This suggests that St (or Tol) interacts with CTA+ at the micellar surface and a threadlike micelle grows longer as [St] (or [Tol]) increases. When CS/CD = 1, τm became shorter with increasing [St] (or [Tol]). This finding suggests that St (or Tol) is solubilized in the deep interior of threadlike micelles and the mechanical strength of threadlike micelles becomes weak with [St] (or [Tol]).
日本レオロジー学会の論文
2000-06-15