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

A nanocomposite material and carbon nanomaterial technology, applied in the field of sensors, can solve the problems of difficulty in exerting the performance advantages of single-layer graphene, inability to meet industrial application requirements, and high preparation costs, and achieve easy expansion of production, high output, and electrical conductivity. Good results

Inactive Publication Date: 2018-08-28
BEIHANG UNIV
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  • Description
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  • Application Information

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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.

Method used

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

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Embodiment Construction

[0021] The present invention is described further below in conjunction with example, but the present invention is not limited to specific embodiment.

[0022] 1) Weigh 8 grams of magnesium powder and 42 grams of NaCl powder, mix them with a shaker in a plastic test tube, and then pour them into two large-sized corundum boats.

[0023] 2) Put the two ceramic boats containing the reactants into the furnace tube, pump air with a mechanical vacuum pump, and then fill it with argon, repeat twice to remove oxygen.

[0024] 3) Introduce argon gas into the liquid carbon disulfide container, and bubble the liquid at a flow rate of 200mL / min, Ar and CS 2 The mixed gas is passed into the tube furnace. At the same time, the furnace was heated up to 600°C at a rate of 15°C and held for 90 minutes. During the reaction, the tube furnace was pumped with a vacuum pump.

[0025] 4) After the reaction, the furnace was naturally cooled to room temperature, and the ceramic boat was taken out an...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L1/18C08K3/04C08L83/04
Inventor 刘金章刘泽辉郑德智
Owner BEIHANG UNIV
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