Method for depositing an adhesive PVC layer on an electrode and electrode obtained according to said method
AssigneeUniversite de Neuchatel
InventorPeter Douwe Van Der Wal
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Abstract
The invention relates to a method for depositing an adhesive PVC copolymer layer on a substrate, characterized in that it comprises the following steps: formation of a mixture of copolymer precursors in an organic solvent, whereby said mixture comprises PVC and 0.1-2 wt. % organotrialkoxysilane of formula H(HN—R1)x—R2—Si—(OR3)3, wherein R1 and R2 are alkyl groups or intermediate aromatic groups, R3 is an aryl group, the three substituents R3 cannot be the same and x is 0-2; a layer of said mixture is deposited on the substrate; the mixture is dried in order to evaporate the solvent; the aggregate thus obtained is heated to a temperature of 70-170° C. for a duration that respectively ranges from 3 hours and 5 minutes.
Claims17
A method for depositing an adhesive PVC copolymer layer on an electrode for ion selective measurement, the electrode comprising (a) a substrate, (b) a measuring element for measuring the activity of an ion in a solution, and (c) a membrane covering said measuring element and formed of a PVC-based material incorporating an ionophoretic agent selected as a function of the ion to be measured, characterized in that the method comprises the steps of:
- forming, in an organic solvent, a mixture of precursors of the copolymer incorporating PVC and 0.1% to 2% by weight of an organotrialkoxysilane corresponding to the formula
- H(HN—R1)xHN—R2—Si—(OR3)3,
- where:
- R1 is an intermediate alkyl or aromatic group;
- R2 is an intermediate alkyl or aromatic group;
- R3 is an alkyl group, with the three R3 substituents possibly being not the same, and
- x is in the range from about 0 to 2,
- depositing a layer of the mixture on said substrate,
- drying the mixture to evaporate the solvent, and
- heating the aggregate thus obtained to a temperature in a range from about 120° C. to about 170° C., for a time in a range from about 5 minutes to about 3 hours.
Dependencies are inferred from the claim text.