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Preparation method of polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material

A technology of carbon nanocomposite and pressure-sensitive materials, which is applied in the field of preparation of polymer foam-based multi-level carbon nanocomposite pressure-sensitive materials, can solve problems such as complex procedures, high requirements, and high costs, and achieve strong operation controllability and quality Lightweight, low-cost effect

Active Publication Date: 2018-01-05
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has high requirements on equipment and reaction conditions, complicated procedures and high cost.

Method used

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  • Preparation method of polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material
  • Preparation method of polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material
  • Preparation method of polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material

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preparation example Construction

[0024] A method for preparing a polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material of the present invention, specifically comprising the following steps:

[0025] Step 1, dispersing graphene oxide (GO) into deionized water, and ultrasonically dispersing to obtain a negatively charged graphene aqueous dispersion;

[0026] The graphene oxide concentration in the graphene oxide aqueous dispersion in step 1 is 1.5-6 mg / mL.

[0027] Step 2, using γ-aminopropyltriethoxysilane (AMEO) in a toluene solvent protected by a nitrogen atmosphere at 60-100°C for 12-24 hours under reflux reaction to carry out surface modification of hydroxylated carbon nanotubes (CNT-OH) Silane, centrifugally washed and freeze-dried, the obtained aminosilane-modified carbon nanotubes (AMEO-CNTs) were dispersed in deionized water, and hydrochloric acid solution was added dropwise to adjust the pH to 5-6 to obtain positively charged aminosilane-modified carbon nanotubes tube (AMEO-...

Embodiment 1

[0036]Weigh 0.045g graphene oxide (GO) and disperse it into 30mL deionized water, and ultrasonically disperse to obtain a negatively charged GO aqueous dispersion with a concentration of 1.5mg / mL; reflux reaction in toluene solvent at 60°C for 12 hours to modify the surface of hydroxylated carbon nanotubes with aminosilane, centrifuge washing and freeze-drying to obtain aminosilane-modified carbon nanotubes; weigh 0.045g of aminosilane-modified carbon nanotubes and disperse them into 30mL In deionized water, add hydrochloric acid solution to adjust the pH to 5 to obtain a positively charged aminosilane-modified carbon nanotube aqueous dispersion with a concentration of 1.5 mg / mL; immerse the polyurethane sponge in the graphene (GO) aqueous dispersion and gently Squeeze repeatedly, take it out after saturation, and dry it in an oven at 90°C; immerse the dried polyurethane sponge-based graphene (GO) composite material in the aqueous dispersion of aminosilane-modified carbon nanot...

Embodiment 2

[0038] Weigh 0.09g graphene oxide (GO) and disperse it into 30mL deionized water, and ultrasonically disperse to obtain a negatively charged GO aqueous dispersion with a concentration of 3.0mg / mL; Hydroxylated carbon nanotubes were surface-modified with aminosilane at 100°C for 24 hours in toluene solvent, washed by centrifugation and freeze-dried to obtain aminosilane-modified carbon nanotubes; weigh 0.09g AMEO-CNTs and disperse them into 30mL deionized water, drop Add hydrochloric acid solution to adjust the pH to 5, and obtain a positively charged AMEO-CNTs aqueous dispersion with a concentration of 3.0mg / mL; immerse the polyurethane sponge in the GO aqueous dispersion and squeeze it gently repeatedly, and take it out in an oven at 60°C after saturation Drying; the dried polyurethane sponge-based GO composite material was immersed in the AMEO-CNTs aqueous dispersion and squeezed repeatedly, and after saturation, it was taken out and dried in an oven at 90°C to obtain a layer...

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Abstract

The invention discloses a preparation method of a polymer foam-based multi-stage carbon nanocomposite pressure-sensitive material. The preparation method comprises the following specific steps: dispersing graphene oxide into deionized water, and performing ultrasonic dispersion to obtain a negatively charged aqueous graphene dispersion; performing a refluxing reaction on gamma-aminopropyltriethoxysilane in a toluene solvent protected by a nitrogen atmosphere to achieve surface aminosilane modification of hydroxylated carbon nanotubes, dispersing the aminosilane-modified carbon nanotubes into deionized water, and dropwise adding a hydrochloric acid solution for pH adjustment to obtain a positively charged aminosilane-modified aqueous carbon nanotube dispersion; immersing perforated polymerfoam into the aqueous graphene dispersion, repeatedly squeezing, taking out after saturation, and drying in a drying box to obtain a polymer foam-based graphene composite material; then immersing thepolymer foam-based graphene composite material into the aminosilane-modified aqueous carbon nanotube dispersion, gently squeezing repeatedly and then drying. By the preparation method, the obtained conductive composite foam material has good flexibility, resilience and pressure-sensitive response.

Description

technical field [0001] The invention belongs to the technical field of polymer-based carbon nanocomposite materials, and relates to a preparation method of a polymer foam-based multilevel carbon nanocomposite pressure-sensitive material. Background technique [0002] Stress and strain sensors are a type of electronic device that converts the stress or strain on a sensitive body into an electrical signal. It can be used to sense the force and deformation on the surface of an object. It has a wide range of application values ​​in the fields of medical health, robotics, and biomechanics. . Traditional pressure sensors are usually made of rigid sensitive materials such as metals and semiconductor strain gauges, which are complicated in process, not suitable for bending and poor in flexibility. Polymer-based conductive composite materials have excellent properties such as light weight, electrical conductivity, chemical corrosion resistance, and easy processing and molding, and h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08L75/04C08L79/08C08L61/28
Inventor 马忠雷马建中陈珊珊邵亮魏阿静谌亚茹董点点姬占有
Owner SHAANXI UNIV OF SCI & TECH
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