Image of Electric Stimulus-Response of Polymer Gels and Its Application to Molecular Design

水膨胀的交联聚合物凝胶在电场的作用下发生变形。为此，利用这些变形特性，聚合物凝胶在电激活设备中的应用得到了广泛的研究。在这种情况下，为了通过在分子水平上观察微观信息来阐明在电场作用下交联型聚甲基丙烯酸凝胶中水分子宏观结构和动力学的变化，我们成功地测量了聚合物凝胶中水分子的^1H自旋密度和^1H自旋-自旋弛豫时间T2的空间分布信息。从这些实验结果中，我们阐明了聚合物凝胶在电场作用下收缩过程和顺磁性金属离子在聚合物凝胶中迁移的机理。此外，还对这些研究工作在聚合物凝胶分子设计中的应用进行了有益的探索。

Water-swollen crosslinked polymer gels deform by the application of an electic field. For this, application of polymer gels to electrically-activated devices have been widely wtudied using these deformation properties. From such situation, in order to clarify changes in macroscopic structure and dynamics of water molecules in crosslinked poly (methacrylic acid) gel by the application of electric field through the observation of microscopic information at the molecular level, ^1H NMR imaging patterns with with information about the spatial distribution of ^1H spin density and ^1H spin-spin relaxation time T2 of water molecules in the polymer gel have been successfully measured. From these experimental results, we have elucidated the mechanism of shrinkage process of polymer gel and migration of paramagnetic metal ion in polymer gel under electric field. Futher, the application of these research works to molecular design of polymer gels has been usefully studied.