CO2-responsive behavior of polymer giant vesicles supporting hindered amine
CO2-responsive behavior of polymer giant vesicles supporting hindered amine
复制标题
DOI：
10.1007/s00396-019-04484-8
复制
发表时间：
2019-02
影响因子：
2.4
通讯作者：
E. Yoshida
中科院分区：
文献类型：
--
作者：
E. Yoshida
研究了壳上支持受阻胺的巨囊泡对co2的响应行为，目的是可逆地控制自组装。采用聚（2,2,6,6-四甲基-4-胡椒酰基甲基丙烯酸酯）-嵌段聚（甲基丙烯酸甲酯-随机-2,2,6,6-四甲基-4-胡椒酰基甲基丙烯酸酯）PTPMA55-b-P(MMA0.977-r-TPMA0.023)321组成的囊泡在甲醇水溶液中进行了研究。随着co2的加入，囊泡溶液的电导率和透光率增加，而光散射测量的散射强度和水动力直径减小，这是由于囊泡在壳上的受阻胺的质子化作用使囊泡解离成胶束。由于去质子化导致胶束聚集，引入Ar而不是co2产生了这些因子的反向变化。囊泡对CO2-Ar的循环具有良好的滞后性。研究发现，CO2-Ar交替引入控制了囊泡的解离-聚集过程。图形抽象
The CO2-responsive behavior of giant vesicles supporting hindered amines on the shells was investigated with the aim of reversible control of the self-assembly. The investigation was carried out using vesicles consisting of poly(2,2,6,6-tetramethyl-4-piperidyl methacrylate)-block-poly(methyl methacrylate-random-2,2,6,6-tetramethyl-4-piperidyl methacrylate), PTPMA55-b-P(MMA0.977-r-TPMA0.023)321, in an aqueous methanol solution. As CO2was introduced into the vesicle solution, the electroconductivity and transmittance increased whereas the scattering intensity and hydrodynamic diameter for the light scattering measurements decreased due to the dissociation of the vesicles into micelles based on the protonation of the hindered amines on the shells. The introduction of Ar instead of CO2produced inverse changes in these factors based on the aggregation of the micelles due to the deprotonation. The vesicles showed a good hysteresis for the cycles of the CO2-Ar introduction. It was found that the dissociation-aggregation of the vesicles was reversibly controlled by the alternate CO2-Ar introduction.Graphical Abstract