Diblockopolymers containing the pH-responsive monomer 2-(diethylaminoethyl) methacrylate (DEAEMA) were synthesized via RAFT polymerization. cryo-TEM imaging revealed the formation of micelles that were used for dispersion of C60 fullerenes in native pH, and their responsiveness to pH modification and salt addition was monitored at different concentrations. Concentration-dependent responsiveness was observed: Just above the CMC in native pH, pH reduction results in precipitation (release) of pre-dispersed C60. At high polymer concentrations the C60 dispersions are non-responsive. Dispersions of Carbon Black, a colloidal particle of much larger diameter, characterized as a reference system, showed a different nanomorphology and were not responsive to pH modifications, due to a different dispersion mechanism. We concluded that good size matching between the dispersed particles is necessary for the formation of micelle-entrapped dispersions, and that the responsivity of the C60 dispersion to pH reduction is limited to a concentration range between the CMC in native conditions and the CMC in acidic conditions.

通过RAFT聚合合成了含有pH响应单体2-甲基丙烯酸2-（二乙氨基乙基）酯（DEAEMA）的二嵌段共聚物。低温TEM成像揭示了胶束的形成，该胶束用于在天然pH中分散C60富勒烯，并在不同浓度下监测了它们对pH修饰和盐添加的响应。观察到浓度依赖性的响应性：在天然pH值刚好高于CMC的情况下，pH降低导致预分散的C60沉淀（释放）。在高聚合物浓度下，C60分散体无响应。炭黑是一种直径较大的胶体粒子，其特征是作为参考系统，其分散体显示出不同的纳米形态，并且由于不同的分散机制而对pH值的变化无响应。