Preparation method of porous membrane layer, electrochemical sensor and preparation method

Abstract

The invention discloses a preparation method of a porous membrane layer. The preparation method comprises the steps that a precursor solution is placed in an airtight reaction chamber, and the precursor solution is subject to gelation to obtain porous gel. According to the preparation method, since the sol solution is subject to gelation in the airtight reaction chamber, pore collapse of the gel can be avoided, and the porous membrane layer with uniform pores and high porosity is obtained. The invention furthermore discloses an electrochemical sensor. The electrochemical sensor comprises a first electrode array and a second electrode array, wherein the first electrode array and the second electrode array share a first reference electrode, and the outer side face of the first reference electrode and the outer side face of an enzyme electrode are coated with hydrophobic porous membranes. The electrochemical sensor has high integrity; and since the two electrode arrays share the first reference electrode, the two electrode arrays can be arranged in the same detection channel, and the electrode structure of the senor is simplified. The invention furthermore discloses a preparation method of the electrochemical sensor. Through the preparation method of the electrochemical sensor, the preparation procedure is simplified, and preparation efficiency is high.

Description

technical field [0001] The invention relates to the technical field of electrochemical detection, in particular to a preparation method of a porous film layer, an electrochemical sensor and a preparation method thereof. Background technique [0002] Point Of Care Testing (POCT), that is, bedside testing, is a new field of medical testing technology development. POCT eliminates the complicated processing procedures of laboratory testing, and can be carried out at the sampling site, using portable analytical instruments and supporting reagents to quickly obtain test results. POCT does not require a fixed location, and is suitable for different application scenarios such as emergency rooms, outpatient clinics, patient bedsides, accident scenes, and the field; and can significantly shorten the inspection cycle, diagnose and treat patients in a timely manner, and provide first aid in the field and emergency treatment in hospitals. , chronic disease prevention and control, and fa...

AI Technical Summary

Problems solved by technology

However, during the gelation reaction process of the sol solution, due to the volatilization of the solvent, the internal surface tension of the gel increases, causing the gel network to crack, the pore structure of the gel collapses, and the porosity and specific surface area decrease, making the porous membrane layer The mechanical and electrical properties are reduced, which affects the normal use of membrane electrodes

In order to maintain the pore structure of the porous membrane layer, it is usually necessary to add a porogen to the sol solution, which makes the system components of the sol solution complex, which is not conducive to the optimal adjustment of the composition ratio in the sol solution

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