Shapes of Micelles and Molecular Geometry Synthesis and Studies on the Phase Behaviour, Surface Tension and Rheology of Rigid Rod-Like Surfactants in Aqueous Solutions
Shapes of Micelles and Molecular Geometry Synthesis and Studies on the Phase Behaviour, Surface Tension and Rheology of Rigid Rod-Like Surfactants in Aqueous Solutions
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水溶液中硬棒状表面活性剂的胶束形状与分子几何合成及相行为、表面张力和流变学研究
DOI：
10.1080/02678298808086617
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发表时间：
1988
期刊：
影响因子：
2.2
通讯作者：
H. Finkelmann
中科院分区：
文献类型：
--
作者：
M. Schafheutle;H. Finkelmann
摘要合成了具有刚性棒状疏水基团的两亲分子，研究了棒状疏水基团的堆积限制对两亲分子在水溶液中胶束缔合行为的影响。两亲物/水混合物的相行为的调查表明，液晶相存在于定义的温度和浓度制度，它们都是层状的，无论两亲物的疏水-疏水平衡。对于这些溶致液晶相，观察到的多晶型，这是类似于热致近晶型液晶的多晶型。表面张力测量表明，在稀溶液中的两亲物的临界胶束浓度是类似于那些常规的表面活性剂。从流变学测量可以假设，温度和/或溶液浓度的变化不影响胶束形状。这与非离子的行为相反。
Abstract Amphiphiles with rigid rod-like hydrophobic moieties have been synthesized in order to investigate the effect of the packing restraints of such moieties on the micellar association behaviour of amphiphiles in aqueous solution. Investigations of the phase behaviour of amphiphile/water mixtures reveal that liquid-crystalline phases exist in defined temperature and concentration regimes and that they are all lamellar, regardless of the hydrophilic-hydrophobic balance of the amphiphile. For these lyotropic liquid-crystalline phases a polymorphism is observed which is similar to the polymorphism of thermotropic smectic liquid crystals. Surface tension measurements indicate critical micelle concentrations of the amphiphiles in dilute solutions which are similar to those of conventional surfactants. From rheological measurements it can be assumed that the variation of temperature and/or concentration of the solution does not influence the micellar shape. This is in contrast to the behaviour of non-ionic...