含对苯氧基联接链的羧酸盐Gemini表面活性剂合成及胶团化特性  

Synthesis of Sodium Carboxylate Gemini Surfactants Containing a p-Phendioxy Spacer and Their Micellization in Aqueous Solution

作　　者：杜恣毅[1] 游毅[1] 姜蓉[1] 黄维[1] 郑欧[1] 黄长沧[1] 赵剑曦[1] 

机构地区：[1]福州大学化学系,福州350002

出　　处：《高等学校化学学报》2003年第11期2056-2059,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 173 0 10 );福建省自然科学基金 (批准号 :E0 110 0 12 );福建省教育厅项目 (批准号 :JB0 2 0 65 );福州大学校科技发展基金 [批准号 :XKJ( YM) -0 10 3 ]资助

摘　　要：合成了含对苯氧基联接链的羧酸盐 Gemini表面活性剂 ,研究了其胶团化特性 .结果表明 ,该羧酸盐Gemini表面活性剂具有很低的 cmc值 ,给出了 cmc-T(温度 )以及 lncmc-( m+1 ) (烷烃链长 )的回归方程 .计算了胶团化的热力学函数变化 ,证实胶团化过程来自熵驱动 ,并表现出焓 /熵补偿现象 ,在所考察的系列中 ,以 ( m+1 ) =1 1的胶团最为稳定 .The sodium carboxylate Gemini surfactants containing a p-phendioxy spacer, C m+1—Ph—C m+1(2cbx)·2Na(cbx means carboxylate, m+1=9,11,13), were synthesized and their micellization in aqueous solution was studied by using conductivity measurements. The critical micelle concentration (cmc) of C m+1—Ph—C m+1(2cbx)·2Na was found to be considerably low in aqueous solution. The regression equations of cmc-T was shown as cmc=8.57×10 -4T 2-0.499T+78.2 (m+1=9), cmc=2\^86×10 -5T 2-0.0146T+2.90(m+1=11) and cmc=1.43×10 -5T 2-0.00730T+1.28(m+1=13), respectively. The variation of lncmc with (m+1) for all three surfactants obeyed an unified regression equation as lncmc=0.0323(m+1) 2-1.00(m+1)+7.16. The thermodynamic functions calculated indicate that the micellization is an entropy-driven process and has a character of enthalpy-entropy compensation. In all the systems examined the micelle formed by (m+1)=11 is the most stable.

关 键 词：对苯氧基联接链 羧酸盐 GEMINI表面活性剂 合成 胶团化 

分 类 号：O647.2[理学—物理化学]