Abstract The influence of density of amino groups, nanoparticles dimension and pH on the interaction between end-functionalized polymers and nanoparticles was extensively investigated in this study. PS–NH2 and H2N–PS–NH2 were prepared using reversible addition–fragmentation chain transfer polymerization and atom transfer radical polymerization. Zero-dimensional carbon dots with sulfonate groups, one-dimensional cellulose nanocrystals with sulfate groups and two-dimensional graphene with sulfonate groups in the aqueous phase were added into the toluene phase containing the aminated PS. The results indicate that aminated PS exhibited the strongest interfacial activity after compounding with sulfonated nanoparticles at a pH of 3. PS ended with two amino groups performed better in reducing the water/toluene interfacial tension than PS ended with only one amino group. The dimension of sulfonated nanoparticles also contributed significantly to the reduction in the water/toluene interfacial tension. The minimal interfacial tension was 4.49 mN/m after compounding PS–NH2 with sulfonated zero-dimensional carbon dots.

中文翻译：

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胺化聚苯乙烯的合成及其在油/水界面与纳米粒子的自组装

摘要 本研究广泛研究了氨基密度、纳米颗粒尺寸和 pH 值对末端官能化聚合物与纳米颗粒之间相互作用的影响。PS-NH2 和 H2N-PS-NH2 使用可逆加成-断裂链转移聚合和原子转移自由基聚合制备。将水相中具有磺酸根基团的零维碳点、具有硫酸根基团的一维纤维素纳米晶和具有磺酸根基团的二维石墨烯加入到含有胺化PS的甲苯相中。结果表明，胺化 PS 在与磺化纳米粒子复合后，在 pH 值为 3 时表现出最强的界面活性。以两个氨基结尾的 PS 在降低水/甲苯界面张力方面比仅以一个氨基结尾的 PS 表现更好。磺化纳米颗粒的尺寸也显着降低了水/甲苯界面张力。PS-NH2 与磺化零维碳点复合后的最小界面张力为 4.49 mN/m。