Conductive carbon paste for blood sugar test paper, preparation method thereof, and blood sugar test paper

Abstract

The invention relates to a conductive carbon paste for blood sugar test paper, a preparation method thereof, and a blood sugar test paper. The raw material formula of the conductive carbon paste includes the following components in terms of mass percentage: 5% to 35% of graphene, 0.1% to conductive carbon black 15%, dispersant 0.001-1%, oleoresin 5-50% and solvent 35-80%, and the oleoresin is acrylate resin. In the present invention, by adding graphene sheet and carbon black in specific resin, and using dispersant, the electrode obtained after the prepared conductive carbon paste is solidified has good conductivity and stable electrochemical performance, and the surface of the electrode and the enzyme liquid are also in contact with each other. It has good wettability, and the dried enzyme film has good adhesion on the electrode. The conductive carbon paste of the present invention is used to prepare electrodes for blood glucose test strips. The electrodes have good and stable electrical conductivity, and the surface of the electrodes has the characteristics of easy and uniform distribution of biological enzymes such as glucose oxidase or glucose dehydrogenase and good adhesion. The invention solves the problems of poor sensitivity and poor reliability of existing blood glucose test papers in practical applications.

Description

technical field [0001] The invention belongs to the technical field of conductive carbon paste for blood sugar test paper, and in particular relates to a conductive carbon paste for blood sugar test paper, a preparation method thereof, and blood sugar test paper. Background technique [0002] Electrochemical detection method to measure blood glucose concentration is a common blood glucose concentration detection method, which uses blood glucose test strips to detect the current signal generated during the reaction between the enzyme in the electrode reaction zone and glucose, so as to reflect the blood glucose concentration. The current signal output value of the blood glucose test strip is directly proportional to the reaction area of ​​the electrode reaction area, and the distribution area of ​​the enzyme in the electrode reaction area directly determines the effective reaction area of ​​the electrode reaction area. The wettability of the electrode surface has a crucial im...

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Problems solved by technology

The slurry improves the conductive network structure inside the polymer matrix and has excellent electrical conductivity. However, the slurry is developed for heat-generating materials. From the perspective of its formulation and selected resin, it is not suitable for the conductivity of blood glucose test strips carbon paste

[0006] In short, at present, most of the blood glucose test paper electrodes made of conductive carbon paste have the disadvantages of poor wettability between the electrode surface and the enzyme, poor conductivity and unstable performance of the electrode, which seriously affect the sensitivity and reliability of blood glucose detection.

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