Indexed by:
Abstract:
测定了Gemini阳离子表面活性剂Cm-s-Cm@2Br(m=8,10,12;s=2,6及m=12;s=3,4)水溶液的电导,从电导(к)~表面活性剂浓度(c)曲线的转折点可求得临界胶团浓度cmc.实验发现,Gemini阳离子表面活性剂的胶团化倾向明显强于其"单体分子”(即单离子头基单烷烃链表面活性剂).根据质量作用模型计算了胶团化过程的吉布氏能、焓和熵的改变,结果表明Gemini表面活性剂聚集机理和其对应的"单体分子”类似,主要来自熵驱动.所有的焓/熵补偿图均呈现良好的线性关系,补偿直线在y轴的截距随s减小而变小,这意味着具有较小s的Gemini表面活性剂倾向于生成稳定的胶团.
Keyword:
Reprint 's Address:
Email:
Source :
化学学报
ISSN: 0567-7351
CN: 31-1320/O6
Year: 2001
Issue: 5
Volume: 59
Page: 690-695
0 . 5 3
JCR@2001
1 . 7 0 0
JCR@2023
ESI Discipline: CHEMISTRY;
JCR Journal Grade:3
Cited Count:
SCOPUS Cited Count:
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 4