Properties of the aqueous vesicle dispersion formed with poly(oxyethylene) hydrogenated castor oil
Properties of the aqueous vesicle dispersion formed with poly(oxyethylene) hydrogenated castor oil
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由聚氧乙烯氢化蓖麻油形成的水性囊泡分散体的性质
DOI：
10.1007/bf02631390
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发表时间：
1990
影响因子：
2
通讯作者：
T. Horiuchi
中科院分区：
文献类型：
--
作者：
Minako Tanaka;H. Fukuda;T. Horiuchi
通过偏光显微镜、冷冻断裂电子显微镜、粒径分析、ESR自旋标记和1H-NMR谱研究了聚氧乙烯氢化蓖麻油醚(HCO-10)水分散体的相关性能。当HCO-10浓度低于20wt%时，形成平均直径约0.4μ的稳定的多层囊泡，其相呈同心片层。囊泡的亲水层比疏水核心更坚硬。 HCO-10 囊泡中自旋标记 12NS 周围的流动性随温度显着降低；然而，自旋标记5NS和16NS均没有明显变化。从HCO-10囊泡中环氧乙烷脱水和氢键断裂的角度讨论了流动性随温度变化的机制。
Associated properties of the aqueous dispersion of poly(oxyethylene)hydrogenated castor oil ether(HCO-10) were studied by means of polarized microscopy, freeze-fractured electron microscopy, particle size analysis, ESR spin labelling and1H-NMR spectra. A stable multilamellar vesicle with an average diameter of ca 0.4 μ is formed from the HCO-10 concentration below 20 wt% whose phase shows a concentric lamella.The hydrophilic layer of the vesicle is more rigid than the hydrophobic core. The fluidity around the spin label 12NS incorporated in the HCO-10 vesicle significantly decreased with temperature; however, both spin labels 5NS and 16NS did not change significantly.The mechanism of fluidity change with temperature was discussed in terms of the dehydration of ethylene oxide and the breakdown of hydrogen bonding in the HCO-10 vesicle.