Quantitative Evaluation of Hydrophilic-Hydrophobic Interaction in Amphiphilic Polymers

两亲聚合物中亲水-疏水相互作用的定量评价

基本信息

批准号：
09305062
负责人：
YAMAOKA Hitoshi
金额：
$ 24.45万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

Self-assembly of novel amphiphilic polymers containing silicon or fluorine atoms were investigated in detail. Small angle X-ray and neutron scattering techniques were employed for the analysis of the polymer aggregates in solution and X-ray reflectivity measurements were applied to the study of the polymer monolayers at the air-water interface. A comb-like amphiphilic polysilacyclobutane (SB) with hydrophilic polyoxyethylene side chains dissolved as a single molecule in methanol or water. contrast, a 1 : 1 block copolymer composed of hydrophobic SB and hydrophilic 2-hydroxyethyl methacrylate (HEMA) or a 1 : 1 block copolymer composed of hydrophobic polystyrene and hydrophilic poly (3-hydroxymethylsilacyclobutane) formed micelles with hydrophobic core in methanol. Similarly they formed reversed-micelles with hydrophilic core in toluene. A 1 : 1 block copolymer composed of SB and HEMA formed uniform and stable monolayer at the water surface. A water-soluble vinyl ether block copolymer consisting of a short water-insoluble fluorinated segment and a long water-soluble polar segment formed core-shelled micelles in water as in the same way of non-fluorinated block copolymers. It is worth noting that the micelles formed by the fluorine-containing block copolymer could selectively solubilize fluorinated compounds from the mixture of fluorinated and non-fluorinated water-insoluble compounds. These results provided useful and important information for the evaluation of the hydrophilic-hydrophobic interaction of amphiphilic polymers.

详细研究了含有硅或氟原子的新型两亲聚合物的自组装。小角度X射线和中子散射技术用于分析溶液中的聚合物聚集体，并且X射线反射率测量用于研究空气-水界面处的聚合物单分子层。具有亲水性聚氧乙烯侧链的梳状两亲性聚硅杂环丁烷 (SB) 以单分子形式溶解在甲醇或水中。相比之下，由疏水性SB和亲水性甲基丙烯酸2-羟乙酯(HEMA)组成的1:1嵌段共聚物或由疏水性聚苯乙烯和亲水性聚(3-羟甲基硅杂环丁烷)组成的1:1嵌段共聚物在甲醇中形成具有疏水核的胶束。类似地，它们在甲苯中形成具有亲水核的反胶束。由SB和HEMA组成的1:1嵌段共聚物在水面形成均匀稳定的单分子层。由短的水不溶性氟化链段和长的水溶性极性链段组成的水溶性乙烯基醚嵌段共聚物在水中与非氟化嵌段共聚物相同地形成核壳胶束。值得注意的是，含氟嵌段共聚物形成的胶束可以从氟化和非氟化的水不溶性化合物的混合物中选择性地溶解氟化化合物。这些结果为评估两亲聚合物的亲水-疏水相互作用提供了有用且重要的信息。