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Dielectric spectroscopy and micellization of aqueous solutions p-isononylphenoloxyethyleneglycolether

机译:对-异壬基酚氧基乙烯乙二醇醚的水溶液介电谱和胶束化

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Dielectric relaxation spectra of optically isotropic aqueous solutions of p-isononylphenoldecaglycolether (NOP-10) were measured at 1.1 MHz, 9.376 GHz, 37.5 GHz from 275 to 313 K. The data were described assuming three Debye dispersion regions. Hydration numbers of NOP-10 molecules were calculated from an amplitude of the second dispersion region. Static permittivity values of the solutions were analyzed using theories for heterogeneous systems, and it was concluded that spheroidal micelles formed in the solutions at all investigated conditions. The shape of the micelles changed from prolate spheroids to spheres and then to oblate spheroids in the solutions with 9.97, 20, 30 wt% of NOP-10 in the temperature range from 275 to 313 K. A study of solutions with lower content of NOP-10 (1.14 and 4.97 wt%) have been made from 275 to 351 K, and it was deduced that in this case spherical micelles transformed to oblate spheroids and then to discs. (c) 2005 Elsevier B.V. All rights reserved.
机译:在275至313 K的1.1 MHz,9.376 GHz,37.5 GHz处测量了对异壬基苯酚癸二醇醚(NOP-10)的光学各向同性水溶液的介电弛豫谱。假设三个Debye分散区,则描述了数据。由第二分散区域的振幅算出NOP-10分子的水合数。使用异构系统的理论分析了溶液的静态介电常数值,并得出结论,在所有研究条件下,溶液中均形成了球形胶束。在275至313 K的温度范围内,胶束的形状从长球形变成球形,然后变成扁球形,含9.97,20,30 wt%的NOP-10。在NOP含量较低的溶液中的研究。 -10(1.14和4.97 wt%)由275至351 K制成,据推断,在这种情况下,球形胶束先转变为扁球形,然后转变为圆盘。 (c)2005 Elsevier B.V.保留所有权利。

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