Premium
Redox reactions in the presence of an ion‐exchange/hydrogel composite film
Author(s) -
Somasundrum Mithran,
Bannister Joe V.
Publication year - 1997
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140090114
Subject(s) - redox , vinyl alcohol , nafion , cyclic voltammetry , composite number , ion exchange , polymer chemistry , chemistry , chemical engineering , adsorption , membrane , electrolyte , electrochemistry , glucose oxidase , inorganic chemistry , materials science , electrode , ion , polymer , organic chemistry , composite material , biochemistry , engineering
The formation of a composite ion‐exchange/hydrogel membrane using a mixture of Nafion and poly(vinyl alcohol), is described. The structure of the composite is investigated by following the cyclic voltammetry of anionic redox couples present in bulk solution, and by following the diffusional characteristics of cationic redox couples entrapped within the films. Hydrophobic redox species exhibit greater rates of diffusion within the composite films than within films of homogeneous Nafion. The films show greater resistance to protein adsorption than cellulose acetate or poly(carbonate). Electrical communication between co‐immobilized enzyme (glucose oxidase) and hydrophobic mediator is demonstrated.