Influence of Salt Concentration on Hydrated Polymer Relative Permittivity and State of Water Properties
Influence of Salt Concentration on Hydrated Polymer Relative Permittivity and State of Water Properties
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DOI：
10.1021/acs.macromol.0c02188
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发表时间：
2021-01-26
期刊：
影响因子：
5.5
通讯作者：
Geise, Geoffrey M.
中科院分区：
文献类型：
--
作者：
Chang, Kevin;Luo, Hongxi;Geise, Geoffrey M.
关于含水电解质暴露如何影响水合聚合物的相对介电常数和水性质的状态知之甚少。增加NaCl溶液浓度（0.01，0.1，和1.0 mol/L）引起交联的缩水甘油基和甘油甲基丙烯酸酯为基础的共聚物，以螺旋形deswell，并导致离子吸附增加相反的静电理论和麦克斯韦加内特方程的预测。的存在下，由于盐溶液平衡，在聚合物中的离子驱动的静态介电常数的增加相比，纯水平衡的等效水含量的样品。盐浓度对水合聚合物介电常数性质的影响从根本上不同于其对电解质水溶液的影响，其中介电常数随着盐作为盐浓度的增加而降低。一般来说，聚合物中的体状水的量作为盐浓度的增加而减少，但在低水含量下观察到最大值（
Little is known about how aqueous electrolyte exposure affects hydrated polymer relative permittivity and state of water properties. Increasing NaCl solution concentration (0.01, 0.1, and 1.0 mol/L) caused a cross-linked glycidyl and glycerol methacrylate-based copolymer to osmotically deswell and caused ion sorption to increase opposite to electrostatic theory and Maxwell Garnett equation predictions. The presence, due to salt solution equilibration, of ions in the polymer drove an increase in static permittivity compared to that of pure water-equilibrated equivalent water content samples. The influence of salt concentration on hydrated polymer dielectric permittivity properties was fundamentally different from its influence on aqueous electrolyte solutions where dielectric permittivity decreases as salt concentration increases. Generally, the amount of bulk-like water in the polymers decreased as salt concentration increased, but a maximum was observed in low water content (