Light-Scattering Characterization of the Wormlike Micelles of Hexaoxyethylene Dodecyl C12E6 and Hexaoxyethylene Tetradecyl C14E6 Ethers in Dilute Aqueous Solution
Light-Scattering Characterization of the Wormlike Micelles of Hexaoxyethylene Dodecyl C12E6 and Hexaoxyethylene Tetradecyl C14E6 Ethers in Dilute Aqueous Solution
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稀水溶液中六氧乙烯十二烷基 C12E6 和六氧乙烯十四烷基 C14E6 醚蠕虫状胶束的光散射表征
DOI：
10.1021/jp0488214
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发表时间：
2004
影响因子：
3.3
通讯作者：
Y. Einaga
中科院分区：
文献类型：
--
作者：
Sachiko Yoshimura;Satoko Shirai;Y. Einaga
通过静态(SLS)和动态光散射(DLS)实验，在低于临界点的几个温度T下，测定了六氧乙烯十二烷基醚C12E6胶束和十六氧乙烯十四烷基醚C14E6胶束在稀水溶液中的尺寸、形状和柔韧性。借助胶束溶液的热力学理论，成功地分析了蠕虫状球柱模型形成的胶束溶液中的SLS结果。分析得到了胶束的摩尔质量Mw与c的函数关系，C12E6胶束的横截面直径d为2.3 nm，C14E6胶束的横截面直径为2.4 nm。结果表明，胶束的尺寸随c和T的增大而增大，符合Mw∝c1/2关系。对于蠕虫状球柱模型和蠕虫链模型，胶束的流体动力学半径Rh和回转半径<s2>1/2与mw的函数关系也可用相应的理论描述。那个.。
The size, shape, and flexibility of hexaoxyethylene dodecyl ether C12E6 micelles and hexaoxyethylene tetradecyl ether C14E6 micelles in dilute aqueous solutions were determined at finite surfactant concentrations, c, by static (SLS) and dynamic light scattering (DLS) experiments at several temperatures T below the critical points. The SLS results were successfully analyzed with the aid of the thermodynamic theory for SLS from micelle solutions formulated with the wormlike spherocylinder model. The analysis yielded the molar mass Mw of the micelle as a function of c and the cross-sectional diameter d of 2.3 nm for the C12E6 micelles and 2.4 nm for the C14E6 micelles. It has been found that micelles grow in size with increasing c and T, following the relation Mw ∝ c1/2. The hydrodynamic radius RH and the radius of gyration 〈S2〉1/2 of the micelles as functions of Mw were found also to be well described by the corresponding theories for the wormlike spherocylinder and wormlike chain models, respectively. The ...