Organic silica gel/three-dimensional graphene carbon nanocomposite-based small-sized pressure sensor

Abstract

The technical invention introduces an organic silica gel / three-dimensional graphene carbon nanocomposite-based small-sized pressure sensor. Graphene-like carbon nanomaterials have high application value in the fields such as supercapacitors, lithium ion battery anodes, catalysis, adsorption, and sensors. According to the small-sized pressure sensor of the invention, a three-dimensional graphene-like carbon nanomaterial is obtained by means of a thermochemical reaction between magnesium powder and carbon disulfide; and the three-dimensional graphene-like carbon nanomaterial, adopted as a conductive medium, fills polydimethylsiloxane silica gel, so that a piezoresistive sensing material can be obtained; and a laser marking machine is adopted to etch an interdigital pattern on a Cu / PET thin film; and the interdigital pattern is coated with a liquid PDMS (polydimethylsiloxane) nanocomposite material, the liquid PDMS nanocomposite material is solidified, so that the small-sized pressure sensor can be obtained. The device has the advantages of wide measurement range and high sensitivity. The small-sized pressure sensors can be made into an array which can be applied to plantar pressure distribution testing or other fields.

Description

technical field [0001] The technical invention belongs to the field of sensors, and its main content is a technology for preparing a three-dimensional structure graphene-like carbon material and a method for applying it to a pressure sensor. A graphene-like carbon nanomaterial with a three-dimensional structure was prepared by using magnesium powder and carbon disulfide as precursors. It is mixed with polydimethylsiloxane (PDMS) in a certain mass ratio, and the cured elastic composite material is used as a piezoresistive medium to prepare a small pressure sensor. Using planar interdigitated electrode structure, the device is small and compact, with wide measurement range and high sensitivity. Background technique [0002] Nanomaterials refer to particles with at least one dimension in the nanometer range in three-dimensional space, and this size characteristic endows them with new characteristics different from non-nanomaterials, namely high specific surface area, unique me...

AI Technical Summary

Problems solved by technology

Graphene, as a typical two-dimensional carbon nanomaterial, is currently expensive to prepare and cannot meet the requirements of industrial applications.

Moreover, due to the π-π interaction between the sheets, it is easy to stack into a graphite structure again, and it is difficult to take advantage of the performance advantages of single-layer graphene.

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