Wide-range high-toughness nanoscale conductive rubber sensor, preparation method thereof and packaging method thereof

Abstract

The invention relates to the technical field of pressure measurement, and provides a wide-range high-toughness nanoscale conductive rubber sensor, a preparation method thereof and a packaging method thereof. The preparation method adopts a high-temperature internal mixing method to improve the dispersion of conductive filler, and a sandwich structure is cured under a high-pressure condition, so that a rubber structure is more compact. The nanoscale conductive rubber sensor prepared according to the preparation method is wide in measurement range, high in sensitivity, and high in stability. According to the wide-range high-toughness nanoscale conductive rubber sensor, the preparation method thereof and the packaging method thereof, a rubber matrix is used for packaging the nanoscale conductive rubber sensor, and a case, a cover plate and a sealing cover are used for sealing the rubber matrix packaged with the sensor so as to achieve an ingenious packaging structure. Therefore, the sensor is stressed in a balanced manner, and the situation of structural damage caused by stress concentration is avoided. Meanwhile, through the packaging of the rubber matrix, the whole sensor has the excellent characteristics of high-temperature resistance, water resistance, fire resistance, ultraviolet resistance, acid and alkali corrosion resistance and the like, and is better in aging-resistant stability, and longer in service life and high in safety under a high-load condition.

Description

technical field [0001] The invention relates to the technical field of pressure measurement, in particular to a large-scale high-toughness nano-conductive rubber sensor and a preparation and packaging method thereof. Background technique [0002] Nano-conductive rubber is a composite material with conductive properties obtained by mixing nano-scale conductive fillers into the insulating polymer matrix. It has good piezoresistive properties, durability and flexibility, and has a wide range of applications in the field of pressure sensing. . [0003] In the preparation process of the existing nano-conductive rubber, it is difficult to disperse the conductive filler uniformly in the rubber polymer, so it is necessary to add a large amount of conductive filler to reach the percolation threshold, and the increase of the conductive filler will lead to deterioration of the strength and resilience of the rubber. , which in turn affects the measurement range and sensitivity of the s...

AI Technical Summary

Problems solved by technology

[0003] In the preparation process of the existing nano-conductive rubber, it is difficult to disperse the conductive filler uniformly in the rubber polymer, so it is necessary to add a large amount of conductive filler to reach the percolation threshold, and the increase of the conductive filler will lead to deterioration of the strength and resilience of the rubber. , thereby affecting the measurement range and sensitivity of the sensor; and the pressure resistance and stability of the nano-conductive rubber prepared by the traditional method also need to be improved

[0004] The traditional nano conductive rubber sensor has poor pressure resistance, so the test range is narrow, and the pressure test range is mostly distributed between 0 and 2MPa

For a very small number of large-range conductive rubber sensors, due to the design of the package structure, the internal stress of the sensor cannot be effectively offset, resulting in local stress concentration, which is easy to damage the structure of the sensor, greatly affecting the stability and life of the sensor.

The above problems severely limit the application of nano-conductive rubber sensors in construction engineering, bridge engineering, Internet of Things, smart wear, medical health, etc.

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