Transport properties of anion-exchange membranes: Effect of the formation of complexes
Transport properties of anion-exchange membranes: Effect of the formation of complexes
复制标题
阴离子交换膜的传输特性：复合物形成的影响
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
A. V. Dyukov
中科院分区：
文献类型：
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作者：
S. Shishkina;E. Pechenkina;A. V. Dyukov
研究了MA-40和MA-41非均相阴离子交换膜在铜、镍和锌离子溶液中的电导率和扩散渗透性。接触溶液中存在的物质的组成是基于平衡和物质平衡的条件计算的，其中考虑到这些阳离子形成络合物的趋势。结果表明，MA-40在过渡金属氯化物稀溶液中的电导率增加的原因是这些阳离子和官能团之间的络合和由此产生的聚合物基体的总正电荷的增加。在电膜相中与铜和锌离子的络合降低了氯离子的迁移率，从而随着平衡溶液浓度的增加而降低了膜的电导率。使用测定膜的传输性质和结构的方法表征膜。该方法是第一次适用于络合共离子，与津贴的变化，其电荷和组成。
Electroconductivity and diffusion permeability of heterogeneous anion-exchange membranes MA-40 and MA-41 are studied in solutions containing copper, nickel, and zinc cations. The composition of species present in the contacting solution is calculated on the basis of conditions of equilibrium and material balance with allowance made for the tendency of these cations to form complexes. It is shown that the reason for the electroconductivity of MA-40 increasing in dilute solutions of transition metal chlorides is the complexing between these cations and functional groups and the resultant increase in the overall positive charge of the polymer matrix. The complexing with ions of copper and zinc in the electromembrane phase reduces the mobility of chloride ions, thus lowering the membranes’ electroconductivity with increasing concentration of equilibrium solutions. The membranes are characterized using a method of determination of the transport properties and structure of the membranes. The method is applied for the first time to the complexing co-ions, with allowance made for variations in their charge and composition.