Kuhn P S, Diehl A
Departamento de Física, Instituto de Física e Matemática, Universidade Federal de Pelotas, Caixa Postal 354, CEP 96010-900, Pelotas, RS, Brazil.
Phys Rev E Stat Nonlin Soft Matter Phys. 2007 Oct;76(4 Pt 1):041807. doi: 10.1103/PhysRevE.76.041807. Epub 2007 Oct 26.
Conformational behavior of flexible polyelectrolytes in the presence of monovalent cationic surfactants is examined. A simple model is presented for the formation of polyelectrolyte-surfactant complexes in salt-free solutions in the framework of the Debye-Hückel-Bjerrum-Manning and Flory theories, including explicitly the hydrophobic interactions between the associated surfactant molecules on the polyelectrolyte. The distribution of complexes is calculated as a function of the surfactant concentration and a discrete conformational transition between an elongated coil and a compact globule was found, in agreement with experimental observations.
研究了柔性聚电解质在单价阳离子表面活性剂存在下的构象行为。在德拜 - 休克尔 - 比耶鲁姆 - 曼宁理论和弗洛里理论的框架内，提出了一个关于无盐溶液中聚电解质 - 表面活性剂复合物形成的简单模型，其中明确考虑了聚电解质上缔合表面活性剂分子之间的疏水相互作用。计算了复合物的分布作为表面活性剂浓度的函数，并发现了在伸长的线圈和紧密的球体之间的离散构象转变，这与实验观察结果一致。
