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Citation: JIANG Rong, ZHAO Jian-Xi, HU Xiao-Ming, HUANG Chang-Cang. Effect of Organic Counter-ions on the Surface Activity of C₁₂-s-C₁₂·2Br in Aqueous Solution[J]. Acta Physico-Chimica Sinica, ;2007, 23(08): 1260-1264. doi: 10.3866/PKU.WHXB20070823 shu

Effect of Organic Counter-ions on the Surface Activity of C₁₂-s-C₁₂·2Br in Aqueous Solution

1.
Department of Applied Chemistry, College of Chemistry and Chemical Engineering, Fuzhou University, Fuzhou 350002, P. R. China

Received Date: 28 December 2006
Available Online: 22 May 2007

Sodiumbenzenesulfonate (SNzS) and sodiumnaphthalenesulfonate (SNphS) added in the solution strongly associated with quaternary ammonium gemini surfactants (C12-s-C12·2Br), which increased the hydrophobicity of C12-s-C12·2Br molecule and obviously enhanced their adsorption at the air/water interface and aggregation in the solution. This resulted in great increase in the efficiency and the effectiveness in surface tension reduction, and the formation of small aggregates in the solution at very low concentration of surfactant. Thus, the cmc obtained by surface tension method was only of apparent significance and it reflected the critical concentration when the surfactant reaching saturated adsorption at the air/water interface. Compared with SNzS, SNphS promoted more effectively both adsorption and aggregation of C12-s-C12·2Br due to its higher hydrophobicity.
- C12-s-C12·2Br; Organic counter-ion; Surface activity
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Effect of Organic Counter-ions on the Surface Activity of C12-s-C12·2Br in Aqueous Solution

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通讯作者: 陈斌, bchen63@163.com

Effect of Organic Counter-ions on the Surface Activity of C₁₂-s-C₁₂·2Br in Aqueous Solution