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化学学报
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化学学报 ›› 2006, Vol. 64 ›› Issue (24): 2437-2441. 上一篇    下一篇

研究论文

无探针紫外光谱法测定CTAB的第二临界胶束浓度

卢惠娟, 陈冲, 郭宏涛, 周晓海*, 董金凤, 洪昕林, 李学丰, 张高勇   

  1. (武汉大学化学与分子科学学院 武汉 430072)
  • 投稿日期:2006-01-10 修回日期:2006-03-23 发布日期:2006-12-28
  • 通讯作者: 周晓海

Determination of the Second Critical Micelle Concentration of CTAB by UV Spectra without Probe

LU Hui-Juan; CHEN Chong; GUO Hong-Tao; ZHOU Xiao-Hai*; DONG Jin-Feng; HONG Xin-Lin; LI Xue-Feng; ZHANG Gao-Yong   

  1. (College of Chemisty and Molecular Science, Wuhan University, Wuhan 430072)
  • Received:2006-01-10 Revised:2006-03-23 Published:2006-12-28
  • Contact: ZHOU Xiao-Hai

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2234

被引次数

68 | 4

应用无探针的紫外吸收分光光谱法(UV)测定了十六烷基三甲基溴化铵(CTAB)溶液的第一、第二临界胶束浓度(CMC), 并用1H NMR谱和动态光散射的实验方法检测到了两个浓度时溶液中聚集体的转变, 从而验证了无探针紫外光谱法测定CTAB溶液第二临界胶束浓度的可行性. 此外, 我们还利用紫外光谱法研究了CTAB/KBr体系, 证实KBr可诱导CTAB形成蠕虫状胶束.

关键词: CMC, UV, CTAB, 动态光散射, 1H NMR

In this article, ultraviolet absorption spectra (UV) without probe were used to determine the first and second critical micelle concentration (CMC) of cetyltrimethylammonium bromide (CTAB), and the transformation of congeries at the CMC were detected by 1H NMR spectra and dynamic light scattering, which just tested and verified the feasibility of using UV spectra without probe to determine the second CMC of the aqueous solution of CTAB. Furthermore, UV spectral method was also used to investigate the CTAB/KBr system, and it was confirmed that the formation of CTAB wormlike micelle could be induced by the aqueous solution of KBr.

Key words: CMC, UV, CTAB, dynamic light scattering, 1H NMR