Graphene conductive paste for textile-based sensor and preparation method of graphene conductive paste

Abstract

The invention relates to the technical field of graphene conductive materials, and in particular relates to graphene conductive paste for a textile-based sensor. The graphene conductive paste is prepared by blending a graphene solution and a water-soluble polyurethane solution according to a certain proportion, the graphene conductive paste is a solution in which the effective content ratio of graphene to polyurethane is 1% to 6%, the graphene solution is prepared by adding a dispersing agent in the process of adding a reducing agent into a graphene oxide solution for reduction, and the concentration mass percent of the graphene solution is 0.1 to 5%. The invention further discloses a preparation method of the graphene conductive paste for the textile-based sensor. The graphene conductive paste prepared by the invention can be coated on textiles, such as yarns and fabrics, so that the textiles have a sensing function, have excellent conductivity, washing resistance and good thermal responsiveness, and the graphene conductive paste is worthy of wide popularization and application.

Description

technical field [0001] The invention relates to the technical field of graphene conductive materials, in particular to a graphene conductive paste for textile-based sensors and a preparation method thereof. Background technique [0002] In recent years, wearable sensors have attracted great attention due to the emergence of various applications in electronic skins, body physiological activities, human-machine interfaces, wearable medical devices, and soft robots. Emerging wearable sensing materials, according to different types of stimuli from the environment and objects, can be divided into strain sensors, pressure sensors, temperature sensors, humidity sensors, etc. Flexible strain sensors have been extensively studied. So far, the integration of sensors on clothing is usually determined by the structure and materials of the sensor, and the selection of sensing substrates and additives with excellent performance has become a top priority. [0003] As we all know, graphen...

AI Technical Summary

Problems solved by technology

However, first of all, because it uses graphene powder, the graphene powder needs to be wetted first and then dispersed, so when the powder is added to the solution, the dispersion is slow, and some parts may appear during the wetting process. The phenomenon of powder stacking and agglomeration

Secondly, although the patent also added a dispersant to assist in the dispersion, it only added the dispersant when adding the powder, and at this time the stacking and agglomeration of graphene particles may have occurred

When agglomeration occurs and then dispersed, the dispersion effect is greatly reduced. Therefore, relatively speaking, the dispersion of graphene powder in the slurry is poor, resulting in a decrease in electrical conductivity and thermal response performance.

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