水溶性刷形聚硅氧烷的合成及聚集行为 Synthesis and Aggregation Behavior of Water Soluble Brush-Like Polysiloxanes

本文通过4种含氢硅油与烯丙基聚醚之间的硅氢加成反应，合成了一系列不同亲水侧链含量的水溶性刷形聚硅氧烷，采用稳态荧光、动态光散射(DLS)和透射电子显微镜(TEM)研究了产物的聚集行为。研究发现，含较多亲水侧链的聚硅氧烷，可聚集形成结构更松散的球形多分子聚集体，聚集体表层的亲水链段密度更大，可使溶液体系更为澄清。相关分子层面与溶液性状的规律性结论可帮助设计具有预期性能的高分子体系。 A series of water soluble brush-like polysiloxane with varying hydrophilic side-chains were syn-thesized by hydrosilylation between 4 kinds of hydride-containing polysiloxanes and unsaturated polyethyleneoxide, and the aggregation behavior was investigated using steady-state fluorescence, dynamic light scattering (DLS), and transmission electron microscopy (TEM). The polysiloxanes with more hydrophilic side-chains would form spherical multipolymer assemblies with a comparatively loose and swollen structure. The density of the hydrophilic side-chains outside the assemblies increased, leading to a solution with improved visible clearness. The obtained relationship between the molecular behavior and the solution characteristics could help design macromolecular systems with expected properties.