Polyacrylate microspheres composite for all-solid-state reference electrodes

A novel concept is proposed for the encapsulation of components within polyacrylate microspheres, prior to their incorporation into a membrane phase. Thus finer and better controlled dispersion of heterogeneous membrane components can be achieved. This concept was verified by using a poly( n -butyl...

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Bibliographic Details
Published in:Analyst (London) 2010-09, Vol.135 (9), p.242-2425
Main Authors: Kisiel, Anna, Donten, Miko aj, Mieczkowski, Józef, Rius-Ruiz, F. Xavier, Maksymiuk, Krzysztof, Michalska, Agata
Format: Article
Language:English
Subjects:
Acrylates
Analytical chemistry
Chemistry
Dispersions
Electrochemical methods
Electrodes
Encapsulation
Exact sciences and technology
Membranes
Microspheres
Polyacrylates
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Summary:A novel concept is proposed for the encapsulation of components within polyacrylate microspheres, prior to their incorporation into a membrane phase. Thus finer and better controlled dispersion of heterogeneous membrane components can be achieved. This concept was verified by using a poly( n -butyl acrylate) membrane-based reference electrode as an example. In this example the proper dispersion of solid constituents of the heterogeneous membrane and prevention of their leakage are both of primary importance. Potassium chloride-loaded poly( n -butyl acrylate) microspheres were prepared and then left in contact with silver nitrate to convert some of the KCl into AgCl. The material obtained was introduced into a poly( n -butyl acrylate) membrane. The reference electrode membranes obtained in this way were characterized with much more stable potential (both in different electrolytes and over time) compared with electrodes prepared by the direct introduction of KCl and AgCl to the membrane. A solid material encapsulated in polymeric microspheres was introduced into reference electrode membranes yielding higher potential stability.
ISSN:0003-2654
1364-5528
DOI:10.1039/c0an00196a