Preparation methods of dendritic nano-silver conductive ink and full-printing stress sensor

Abstract

The invention relates to preparation of dendritic nano-silver conductive ink and a preparation method of a direct screen printing full-printing stress sensor. The dendritic nano-silver conductive inkwith good printing applicability is obtained through introducing Disponer 904S into a dendritic nano-silver / SIS ink system as a dispersant. A screen printing manner is used for printing the prepared dendritic nano-silver conductive ink on a nitrile butadiene rubber substrate and the high-stretchability and high-sensitivity stress sensor can be obtained; stress sensors with different sensing properties can be obtained through printing different geometric patterns. The conductive ink can be directly printed on disposable nitrile butadiene rubber gloves to obtain intelligent gloves capable of detecting gesture motions. The method is low in cost and simple to operate; rapid and large-batch production can be realized; the method can be used for industrial large-batch preparation and productionand can be applied to wearable electronic equipment for detecting human joint motion, and a man-machine interaction intelligent system.

Description

technical field [0001] The invention relates to the preparation of a dendritic nano-silver conductive ink and the preparation method of a direct screen printing fully printed stress sensor. Background technique [0002] Flexible stress sensors can be widely used in human joint motion monitoring, electronic skin, wearable electronic devices and human-computer interaction intelligent systems. Among all stress sensors, resistive stress sensors have attracted extensive attention from researchers due to their simple device structure, high sensitivity, and simple reading mechanism. Resistive strain sensors are usually fabricated by depositing a conductive network of conductive materials on the surface of or embedded in an elastomeric substrate. Currently, various methods are used to fabricate resistive stress sensors, such as spin coating, drop coating, mold filling, injection, vacuum filtration and so on. However, the relatively complicated preparation process and the inability...

AI Technical Summary

Problems solved by technology

In addition, various micro-nano materials commonly used to form conductive networks at present either have high initial resistance (such as graphene, carbon nanotubes, etc.), or require high sintering temperatures (>120°C, such as silver nanowires, silver Nanoparticles, etc.), or the nature of the material itself limits the sensitivity of the sensor (ionic liquids, etc.), which is not conducive to obtaining a stress sensor with high stretchability and high sensitivity