通过核磁共振（NMR）技术研究了阳离子表面活性剂，包括单链（DTAC）和双链（C12-C4-C12和C12-C8-C12）氯化物季铵盐，与非离子表面活性剂壬基酚聚氧乙烯醚（NP-10）组成的3种复配体系的相互作用及作用点、排列方式、混合胶束中分子间与分子内作用的变化规律等.2D NOESY技术证明了这3种复配体系相互作用力大小顺序为NP-10/C12-C8-C12 > NP-10/C12-C4-C12 > NP-10/DTAC，它们的相互作用点相同但作用点数目不同.自扩散系数显示NP-10对混合胶束的动力学半径影响大于季铵盐.弛豫时间表明，当NP-10/DTAC和NP-10/C12-Cs-C12（s=4或8）的混合摩尔比分别为1：3和1：2时，复配体系中分子间的相互作用力开始减小，分子内作用开始起主导作用，这暗示它们最佳摩尔配比分别为1：3和1：2，空间距离也佐证了这一结论.
赵瑞格
,
张占辉
,
杨秋青
,
马二倩
,
李永肖
. NP-10与单链、双链季铵盐三种复配体系相互作用规律的NMR研究[J]. 波谱学杂志, 2017
, 34(1)
: 16
-24
.
DOI: 10.11938/cjmr20170103
NMR spectroscopy was used to study the behaviors of three binary surfactant micellar solutions, NP-10/DTAC, NP-10/C12-C4-C12 and NP-10/C12-C8-C12 respectively. Relative arrangement and the sites of interactions between the surfactant molecule pairs in the mixed micelles, as well as the differences in inter-/intra- molecular interactions were investigated. 2D NOESY experiments revealed that the number of sites of interaction varied across the different binary mixtures, and the degree of interactions increased in the following order:NP-10/C12-C8-C12 > NP-10/C12-C4-C12 > NP-10/DTAC. Self-diffusion coefficient experiments showed that the influence of NP-10 on the hydro-dynamic radius of the mixed micelles was greater than that of quaternary ammonium salts. Spin-spin relaxation time experiments indicated that, for NP-10/DTAC and NP-10/C12-Cs-C12 (s=4 or 8) binary systems, intra-molecular interactions dominated and inter-molecular interactions began to decrease at molar ratios 1:3 and 1:2. These points corresponded to the optimal molar ratio for synergic effects. Spatial distance measurements supported this result, confirmed that the optimal molar ratio was 1:3 and 1:2.
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