Acta Phys. -Chim. Sin. ›› 1991, Vol. 7 ›› Issue (03): 329 -332 .doi: 10.3866/PKU.WHXB19910313

• ARTICLE • Previous Articles     Next Articles

Phase Transition of Sodium Dodecyl Sulfate-Water System: Probing by Pyrene Fluorescence

Wu Jiong-Ru; Tian Yong-Chi; Liang Ying-Qiu   

  1. Institute of Theoretical Chemistry, Jilin University, Changchun 130021
  • Received:1990-02-17 Revised:1990-10-04 Published:1991-06-15
  • Contact: Liang Ying-Qiu

Abstract: The phase transition of 400% sodium dodecyl sulfate (SDS)/water system has been studied by employing pyrene as a fluorescent probe in the temperature range of -20 ℃—+30 ℃. The binary system mainly undergoes coagel-liquid crystal phase transition at about 20 ℃. Free water layer melts at 0 ℃, below and above that different coagel phases were found. Anoval coagel phase was brought forth after annealing at -17 ℃ for 12 hours. All these phases have been fairly characterized by I_E/I_M. Structurual aspects of these phases are idscussed concerning with the fluorescence information.

Key words: Sodium dodecyl sulfate/water, Pyrene, Fluorescence probe, Phase transition