物理化学学报 >> 2008, Vol. 24 >> Issue (07): 1180-1184.doi: 10.1016/S1872-1508(08)60052-2

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TX-114+TBAB体系中非电解质对CP的影响

KABIR-UD-DIN; KHATOON Suraiya; NAQVI Andleeb Z.   

  1. Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India
  • 收稿日期:2008-01-28 修回日期:2008-03-19 发布日期:2008-07-04
  • 通讯作者: KABIR-UD-DIN E-mail:kabir7@rediffmail.com

Nonelectrolyte-Induced CP Variation of TX-114+TBAB System

KABIR-UD-DIN; KHATOON Suraiya; NAQVI Andleeb Z.   

  1. Department of Chemistry, Aligarh Muslim University, Aligarh-202002, India
  • Received:2008-01-28 Revised:2008-03-19 Published:2008-07-04
  • Contact: KABIR-UD-DIN E-mail:kabir7@rediffmail.com

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摘要： The effects of nonelectrolytes (ureas, amino acids, sugars) on the cloud point (CP) of nonionic surfactant Triton X-114 (TX-114) and tetra-n-butylammonium bromide (TBAB) system were studied. Ureas as well as thioureas increased the CP. Behaviors of amino acids depended upon their nature. Nonpolar and uncharged polar amino acids were less effective in changing the CP. However, tryptophan and phenylalanine increased the CP sharply. Acidic amino acid (aspartic acid) and sugars decreased the CP. The results were explained in terms of their effect on water structure. Amino acids got solubilized either in the micellar interior or in the bulk phase.

关键词: Cloud point, Triton X-114, Urea, Thiourea, Sugar, Amino acid

Abstract: The effects of nonelectrolytes (ureas, amino acids, sugars) on the cloud point (CP) of nonionic surfactant Triton X-114 (TX-114) and tetra-n-butylammonium bromide (TBAB) system were studied. Ureas as well as thioureas increased the CP. Behaviors of amino acids depended upon their nature. Nonpolar and uncharged polar amino acids were less effective in changing the CP. However, tryptophan and phenylalanine increased the CP sharply. Acidic amino acid (aspartic acid) and sugars decreased the CP. The results were explained in terms of their effect on water structure. Amino acids got solubilized either in the micellar interior or in the bulk phase.

Key words: Cloud point, Triton X-114, Urea, Thiourea, Sugar, Amino acid