波谱学杂志 ›› 2018, Vol. 35 ›› Issue (1): 81-89.doi: 10.11938/cjmr20172587

• 研究论文 • 上一篇    下一篇

两个非离子表面活性剂复配体系的NMR研究

赵瑞格1, 张卫红1, 马二倩1, 于海涛1, 杨秋青2   

  1. 1. 河北师范大学 化学与材料科学学院, 河北 石家庄 050024;
    2. 河北师范大学 分析测试中心, 河北 石家庄 050024
  • 收稿日期:2017-06-20 出版日期:2018-03-05 发布日期:2018-03-05
  • 通讯作者: 杨秋青,Tel:0311-80786318,E-mail:qiuqingyang@sina.com. E-mail:qiuqingyang@sina.com
  • 基金资助:
    河北省高等学校科学技术资助项目(ZD2015030);河北省自然科学基金资助项目(B2016205249).

An NMR Study on Two Mixed Micelles Formed by Nonionic Surfactants

ZHAO Rui-ge1, ZHANG Wei-hong1, MA Er-qian1, YU Hai-tao1, YANG Qiu-qing2   

  1. 1. College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China;
    2. Analysis and Testing Center, Hebei Normal University, Shijiazhuang 050024, China
  • Received:2017-06-20 Online:2018-03-05 Published:2018-03-05

摘要: 通过核磁共振(NMR)技术对NP-10/Tween40和NP-10/C10E6两个复配体系在不同比例下混合胶束的排列方式、相互作用点及其不同分子间与相同分子间的作用变化进行了研究和比较.二维NOESY实验结果证明了:(1)这两种复配体系的相互作用是随混合比例的不同而变化的;(2)两个复配体系的不同分子间相互作用点有相同之处,但NP-10/Tween40分子间相互作用大于NP-10/C10E6.横向弛豫时间(T2)表明,当NP-10/Tween40和NP-10/C10E6体系的混合比分别为1:2和1:4后,其不同分子间的相互作用开始减小,相同分子间作用开始起主导作用,暗示了复配体系中的理想混合配比和协同效应的变化.横向弛豫时间与纵向弛豫时间之比(TR=T2/T1)反映了与NP-10/C10E6相比,NP-10/Tween40混合胶束分子链的运动受限更加严重.空间距离计算结果也佐证了NP-10/Tween40和NP-10/C10E6复配体系的较为理想的配比分别为1:2和1:4;NP-10/Tween40不同分子间距离小于NP-10/C10E6.

关键词: 核磁共振(NMR), Tween40, C10E6, NP-10, 混合胶束, 相互作用, 动态变化

Abstract: NMR techniques were used to study the relative arrangement and interaction sites in mixed micelles formed in NP-10/Tween40 and NP-10/C10E6 aqueous solutions. The results of two-dimensional NOESY experiments and relaxation time measurements showed that the interaction site of these two pairs of mixed surfactants were similar, but the intermolecular interaction between NP-10 and Tween40 was stronger than that between NP-10 and C10E6. T2 measurements demonstrated that inter-heteromolecular interactions decreased when the molar concentrations of Tween40 and C10E6 were larger than 2 and 4 folds of that of NP-10, respectively. Under such circumstances, the inter-homomolecular interactions began to play a key role, indicative of the ideal mixture molar ratio and the change of synergistic effect in the complex systems. T2/T1 ratio measurements indicated that molecular chain movement in the NP-10/Tween40 mixture was more limited than that in the NP-10/C10E6 mixture. The above conclusions were verified by spatial distance measurements.

Key words: NMR, Tween40, C10E6, NP-10, mixed micelles, interaction, dynamic change

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