DC conductivity behaviour of poly(vinyl alcohol)-based ferrogels: role of borax and carbonyl iron

被引：8

作者：

Lawrence, Mathias B. ^{[1
]}

Joseph, Jaison ^{[2
]}

Phondekar, Karesh ^{[1
]}

Moodi, Kiran ^{[1
]}

机构：

[1] St Xaviers Coll, Dept Phys, Mapuca 403507, Goa, India

[2] Govt Coll Arts Sci & Commerce, Dept Phys, Khandola 403107, Goa, India

来源：

POLYMER BULLETIN | 2019年 / 76卷 / 12期

关键词：

Poly(vinyl alcohol); Borax; Carbonyl iron; d; c; conductivity; HYDROGELS; GEL; POLYVINYL-ALCOHOL); COMPLEX;

D O I：

10.1007/s00289-019-02719-w

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The d.c. conductivity of poly(vinyl alcohol) hydrogels and ferrogels, cross-linked with borax, has been studied using two-probe resistance measurement method as a function of cross-linker and dopant concentrations. The availability of charge carriers (i.e. unbound borate ions and free sodium ions) in these matrices is seen to vary with cross-linker and dopant concentrations. Increase in borax concentration leads to the rise in d.c. conductivity values. Enhancement in the carbonyl iron dopant proportions, at unchanged borax concentrations, causes a decrease in the conductivity. This behaviour is explained on the basis of structural modifications introduced within the network matrix owing to the variations in cross-linker and dopant concentrations.

引用

页码：6327 / 6341

页数：15

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