From Colloidal Aggregates to Layered Nanosized Structures in Polymer−Surfactant Systems. 1. Basic Phenomena
作者:Epameinondas Leontidis、Tasoula Kyprianidou-Leodidou、Walter Caseri、Pierre Robyr、Frank Krumeich、Kyriacos C. Kyriacou
DOI:10.1021/jp0029966
日期:2001.5.1
crystallization behavior that occurs in PbII/S-II/poly(ethylene oxide) (PEO)/sodium dodecyl sulfate (SDS) systems, in which the anionic surfactant interacts strongly with the polymer molecules, forming micellar aggregates attached to the polymer chains above the critical association concentration. Lead sulfide crystallites are formed in the vicinity of polymer-bound micelles by adding lead and sulfide ions to the
在这项工作中,我们研究了在 PbII/S-II/聚(环氧乙烷)(PEO)/十二烷基硫酸钠(SDS)体系中发生的丰富结晶行为,其中阴离子表面活性剂与聚合物分子强烈相互作用,形成胶束聚集在高于临界缔合浓度的聚合物链上。通过将铅和硫化物离子添加到聚合物表面活性剂溶液中,在聚合物结合的胶束附近形成硫化铅微晶。吸附在聚合物链上的表面活性剂稳定的无机颗粒通过聚合物介导的桥接絮凝机制结合,产生特征性的棒状胶体聚集体。在某些条件下,它们演变成一系列亚稳态结构,由硫化铅 PbS 和十二烷基硫酸铅 Pb(DS)2 组成。