Structural changes of poly(butadiene)-poly(ethyleneoxide) diblock-copolymer micelles induced by a cationic surfactant: scattering and cryogenic transmission electron microscopy studies.
Structural changes of poly(butadiene)-poly(ethyleneoxide) diblock-copolymer micelles induced by a cationic surfactant: scattering and cryogenic transmission electron microscopy studies.
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阳离子表面活性剂引起的聚（丁二烯）-聚（环氧乙烷）二嵌段共聚物胶束的结构变化：散射和低温透射电子显微镜研究。
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
C. Böttcher
中科院分区：
文献类型：
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作者：
Anette Nordskog;H. Egger;G. Findenegg;T. Hellweg;H. Schlaad;H. von Berlepsch;C. Böttcher
用静态、动态光散射和小角中子散射研究了聚丁二烯-聚环氧乙烷（B40-b-EO 62）嵌段共聚物及其与阳离子表面活性剂十二烷基三甲基溴化铵（C12 TAB）的混合胶束。结果表明，表面活性剂诱导的主要结构变化，从大的主要是棒状聚集体较小的球形混合胶束。在不存在表面活性剂的情况下发现的棒状组装体具有约1. 500 nm，直径d约为30 nm。加入C12 TAB后获得的球形混合胶束具有15 nm的流体动力学半径，并且仍然含有几个聚合物分子。的散射实验的结果是一致的，通过低温透射电子显微镜观察的聚集体。
Micelles of the diblock copolymer poly(butadiene)-poly(ethyleneoxide) (B40-b-EO62) and mixed micelles of this polymer with the cationic surfactant dodecyltrimethylammonium bromide (C12TAB) were investigated using static and dynamic light scattering and small-angle neutron scattering. It is shown that the surfactant induces a major structural change from large mainly rodlike aggregates to smaller spherical mixed micelles. The rodlike assemblies found in the absence of surfactant have a contour length L of ca. 500 nm and a diameter d approximately 30 nm. The spherical mixed micelles obtained upon addition of C12TAB possess a hydrodynamic radius of 15 nm and still contain several polymer molecules. The results of the scattering experiments are consistent with observations of the aggregates by cryogenic transmission electron microscopy.