A method for preparing flexible strain sensors using biaxial stretching technology

A strain sensor and biaxial stretching technology, applied in the field of sensors, can solve the problems of dispersion of conductive active nanomaterials, easy re-agglomeration plane orientation, etc., achieve large strain range, solve the problems of dispersion and re-agglomeration, and high sensitivity

Active Publication Date: 2022-04-05
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a flexible strain sensor using biaxial stretching technology in order to improve the dispersion, easy re-agglomeration and plane orientation of conductive active nanomaterials

Method used

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  • A method for preparing flexible strain sensors using biaxial stretching technology
  • A method for preparing flexible strain sensors using biaxial stretching technology
  • A method for preparing flexible strain sensors using biaxial stretching technology

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Effect test

Embodiment 1

[0030] like figure 1 As shown, the present invention utilizes biaxial stretching technology to prepare high-performance flexible strain sensor, comprises the following steps:

[0031] Step S1: Disperse the mixture of 0.12 g of reduced graphene oxide and 0.28 g of multi-walled carbon nanotubes in 200 mL of N,N-dimethylformamide solvent for ultrasonic dispersion for 1 hour, and prepare the prepared nanocomposite The solution is poured into a mould, the size of which is 100×100×15 mm, and then the mold is moved into an oven at 80° C. to dry for 24 hours. After drying, a nano-filler composite film is obtained, and the side length of the composite film is 100 mm.

[0032] Step S2: Then spread 10g of polyurethane powder evenly on the composite film, and use a flat vulcanizer to heat press the composite film covered with polyurethane powder for 15 minutes at a temperature of 100°C and a working pressure of 10 MPa to obtain nano Composite sheet.

[0033] Step S3: Move the nanocompos...

Embodiment 2

[0037] The present invention utilizes biaxial stretching technology to prepare high-performance flexible strain sensor, comprises the following steps:

[0038] Step S1: Disperse the mixture of 0.12 g of reduced graphene oxide and 0.28 g of multi-walled carbon nanotubes in 200 mL of N,N-dimethylformamide solvent for ultrasonic dispersion for 1 hour, and prepare the prepared nanocomposite Pour the solution into a mold with a size of 100×100×15mm, and then move the mold into an oven at 80°C to dry for 24 hours. After drying, a nano-filler composite film is obtained, and the side length of the composite film is 100mm;

[0039] Step S2: Then spread 10g of polyurethane powder evenly on the composite film, and use a flat vulcanizer to heat press the composite film covered with polyurethane powder for 15 minutes at a temperature of 100°C and a working pressure of 10 MPa to obtain nano Composite sheets;

[0040]Step S3: Move the nanocomposite sheet into a biaxial tensile testing machi...

Embodiment 3

[0044] The present invention utilizes biaxial stretching technology to prepare high-performance flexible strain sensor, comprises the following steps:

[0045] Step S1: Disperse the mixture of 0.12 g of reduced graphene oxide and 0.28 g of multi-walled carbon nanotubes in 200 mL of N,N-dimethylformamide solvent for ultrasonic dispersion for 1 hour, and prepare the prepared nanocomposite Pour the solution into a mold with a size of 100×100×15mm, and then move the mold into an oven at 80°C to dry for 24 hours. After drying, a nano-filler composite film is obtained, and the side length of the composite film is 100mm;

[0046] Step S2: Then spread 10g of polyurethane powder evenly on the composite film, and use a flat vulcanizer to heat press the composite film covered with polyurethane powder for 15 minutes at a temperature of 100°C and a working pressure of 10 MPa to obtain nano Composite sheets;

[0047] Step S3: Move the nanocomposite sheet into a biaxial tensile testing mach...

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Abstract

The invention discloses a method for preparing a flexible strain sensor by biaxial stretching technology, the steps are as follows: S1, ultrasonically dispersing conductive nano fillers in N,N-dimethylformamide solvent, and then pouring the dispersion into a mold, And place it in an oven to dry to obtain a nano-filler film; S2, spread the polymer material evenly on the surface of the nano-filler film, and heat press it into a sheet; S3, place the sheet on a biaxial tensile testing machine, heat up to 115°C, Carry out transverse and longitudinal synchronous biaxial stretching on the horizontal plane where the sheet is located to obtain a composite film; S4, fold the composite film in half at least twice, then hot press, and perform synchronous biaxial stretching again after hot pressing to form a film; S5, film After cutting, connect electrodes and wires to make sensors. The preparation method of the invention improves the regularity of the conductive network structure, enables uniform dispersion of the conductive filler, and helps to improve the conductive performance, sensitivity and stability of the composite material while saving raw materials.

Description

technical field [0001] The invention relates to the technical field of sensors, in particular to a method for preparing a flexible strain sensor using biaxial stretching technology. Background technique [0002] With the continuous development of wearable electronic devices, stretchable and flexible electronic products that can meet the needs of motion detection and health monitoring applications have attracted attention, and strain sensors determine the performance of wearable electronic devices. Electronic devices that convert mechanical deformation into electrical signals based on polymers are called flexible strain sensors. Most of the traditional strain sensors are based on metal or semiconductor materials, but the development of wearable sensors has been hindered due to their small working strain range and poor wearing experience. At present, there are related reports that conductive active nanomaterials (carbon black, carbon nanotubes, graphene) have been introduced ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L75/04C08K3/04C08L53/02C08L29/04G01B7/16B29C55/16
CPCC08J5/18G01B7/18B29C55/16C08J2375/04C08K3/042C08K3/041C08J2353/02C08J2329/04C08K2201/011C08K2201/001
Inventor 向东陈小雨张学忠李云涛赵春霞王斌李亚鑫张杰
Owner SOUTHWEST PETROLEUM UNIV
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