Ion-selective electrodes with sensing membranes covalently attached to both an inert polymer substrate and conductive carbon contact
AssigneesRosemount Inc., Regents of the University of Minnesota
InventorsKwangrok R. Choi, Ye Lin, Chad McGuire, Philippe Buhlmann
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Abstract
An electrochemical sensor with an ion-selective membrane that is attached through covalent chemical bonds to both an electrically non-conducting polymer substrate (electrode body) and an underlying ion to electron transducer.
Claims24
An electrochemical sensor comprising an ion-selective membrane, an electrically non-conducting polymer substrate or electrode body and an underlying electron conductor, the ion-selective membrane being attached through covalent chemical bonds simultaneously to one of the electrically non-conducting polymer substrate or electrode body, and the underlying electron conductor wherein said covalent chemical bonds comprise an interfacial polymer layer formed of cross-linked poly(decyl methacrylate) chains covalently bonded to both the electrically non-conducting polymer substrate or electrode body and the underlying electron conductor, the poly(decyl methacrylate) chains including benzoyl-derived linkages produced by photoinitiated surface functionalization and photoinitiated graft polymerization, the interfacial polymer layer having a thickness of about 20 to 100 μm and providing direct covalent continuity between the ion-selective membrane and both the electrically non-conducting polymer substrate or the electrode body and the underlying electron conductor.
A reference electrode comprising an ionically conductive polymer matrix covalently bonded to an electron conductor through an interfacial polymer layer comprising cross-linked poly(decyl methacrylate), the interfacial polymer layer providing covalent continuity between the ionically conductive polymer matrix and the electron conductor.
Dependencies are inferred from the claim text.