采用荧光探针、动态光散射和透射电子显微镜研究了NaCl、CaCl<'2>和AlCl<.3>对水溶液中的聚丙烯酸钠(PAANa)自组装行为的影响.实验结果表明,在含有NaCl的聚丙烯酸钠水溶液中,分子链以线团形式存在;而Ca<'2+>或Al<'3+>与聚丙烯酸钠主链间通过静电相互作用自组装形成疏水胶束.当Ca<'2+>/COO<'->=O.5时,分子链自组装形成的疏水胶束平均尺寸为20 nm～40 nm;而由AP<'3+>形成的疏水胶束的平均尺寸则大于Ca<'2+>导致形成的疏水胶束.提出了由Ca<'2+>和Al<'3+>导致形成疏水胶束的自组装机理.
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