INFLUENCE OF ADDITIVES ON ELECTRICAL CHARACTERISTICS OF ION-SELECTIVE POLYMERIC MEMBRANES

被引：0
|
作者：
Totu, Eugenia Eftimie [1 ]
Ruse, Elena [1 ]
Ghica, Ioana Diaconu [1 ]
机构：
[1] Univ Politehn Bucuresti, Dept Analyt Chem & Instrumental Anal, RO-011061 Bucharest, Romania
来源：
PROCEEDINGS OF THE 1ST WSEAS INTERNATIONAL CONFERENCE ON MATERIALS SCIENCE (MATERIALS'08): RECENT ADVANCES IN MATERIALS SCIENCE | 2008年
关键词：
selective membranes; a.c. impedance analysis; lipophilic agent; dielectric constant; conductivity; plasticizer;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
New ion-selective membranes based on polyimide polymeric matrix with synthetic ionophores to be used to obtain potentiometric ion sensor were characterized in terms of electrical parameters. Polyimide based polymeric membranes were characterized as regards the a.c. impedance and electrochemical analyses. The experiments put in evidence the influence of the membrane composition on the electrochemical answer of the sensor. It was concluded that the addition of the lipophilic agent in the selective membrane composition results in membranes with higher dielectric constant. The dielectric constant of the polymeric matrix of the ion-selective devices based on neutral carriers presents an important influence on selectivity.
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页码：44 / 47
页数：4
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