Adsorption of Dodecylpyridinium Chloride on Aqueous Surfaces of Sodium Chloride Solutions

• Fujio, Katsuhiko

• Takeuchi, Kumiko

• Suzuki, Maki

抄録

Surface tension of aqueous NaCl solutions of dodecylpyridinium chloride (DPC) has been measured by the drop weight method at different NaCl concentrations from 0 to 1.000 mol dm-3 at 25℃. Applying the Gibbs adsorption isotherm to the surface tension data at DPC concentrations below the critical micelle concentration (CMC), surface excess densities of dodecylpyridinium ion (DP+), Cl- and Na+ have been obtained as functions of DPC concentration at different NaCl concentrations. Surface excess densities of DP+ and Cl- increase with increasing DPC concentration, and approach the saturated values at the CMC. On the other hand, the surface excess density of Na+ is nearly zero or slightly negative with respect to DPC concentration. Unlike common ionic surfactants, the molecular area of DPC on aqueous surface increases with increasing NaCl concentration up to 0.010 mol dm-3, and then decreases to almost constant value. The Corrin-Harkins plot is linear in NaCl concentration range studied.

収録刊行物

• Proceedings of the School of Science of Tokai University

  Proceedings of the School of Science of Tokai University 47 35-47, 2012-03-30

  Tokai University. School of Science

詳細情報

• CRID: 1050862411863531136
• NII論文ID: 110009904348
• NII書誌ID: AA10925795
• ISSN: 09195025
• Web Site: https://opac-t.time.u-tokai.ac.jp/iwjs0018opc/TC10000004
• 本文言語コード: en
• 資料種別: departmental bulletin paper
• データソース種別:
  • IRDB
  • CiNii Articles