Preparation method of light flexible isolation type elastomer composite microporous strain sensing material

A technology of strain sensing and thermoplastic elastomers, applied in the measurement of the property force of piezoelectric resistance materials, electric/magnetic solid deformation measurement, electromagnetic measurement devices, etc., can solve the problems affecting the machinability and mechanical properties of composite materials, etc. problem, achieve the effect of reducing the conductive percolation threshold, the preparation method is simple and efficient, and the molding processability is good

Active Publication Date: 2021-03-16
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, to achieve good electrical conductivity and sensing performance usually requires high loading, which seriously affects the processability and mechanical properties (mainly strength and flexibility) of composites.

Method used

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  • Preparation method of light flexible isolation type elastomer composite microporous strain sensing material
  • Preparation method of light flexible isolation type elastomer composite microporous strain sensing material
  • Preparation method of light flexible isolation type elastomer composite microporous strain sensing material

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preparation example Construction

[0024] The invention discloses a method for preparing a lightweight, flexible isolation type elastomer composite microporous strain sensing material, which specifically includes the following steps:

[0025] In step 1, the thermoplastic elastomer beads are placed in a supercritical CO 2 Carry out saturated absorption in an autoclave for 3 to 6 hours. The saturation temperature is 35 to 60°C and the saturation pressure is 8 to 16 MPa. Then, place the fully saturated thermoplastic elastomer beads in a high temperature foaming device (oil bath, heating kettle and oven) etc.) for microcellular foaming, the foaming temperature is 100-130°C, and the foaming time is 45-100s to obtain thermoplastic elastomer microcellular foamed beads with different expansion ratios;

[0026] Thermoplastic elastomers include thermoplastic nylon elastomer (TPAE), thermoplastic polyurethane elastomer (TPU), thermoplastic polyester elastomer (TPEE), thermoplastic polyolefin elastomer (TPO), etc., accordi...

Embodiment 1

[0033] Nylon 66 thermoplastic elastomer beads were placed in an autoclave, heated and fed with supercritical CO 2 fluid, the saturation temperature is 35°C, the saturation pressure is 8MPa, the saturation time is 3h, and then the nylon 66 thermoplastic elastomer beads / CO 2 The mixed material was transferred to a constant temperature silicone oil bath for foaming. The foaming temperature was 100°C, and the foaming time was 45s. Finally, it was placed at room temperature to cool and shape to obtain nylon 66 thermoplastic elastomer microcellular foamed beads. The conductive silver (Ag) paste was wrapped on the surface of thermoplastic elastomer microporous foamed beads by dip coating method, and dried at room temperature to obtain silver-coated nylon 66 thermoplastic elastomer microporous foamed beads; MWCNTs were dispersed in PDMS In the preform solution, ultrasonically stirred for 30 minutes, and then placed in a constant temperature oven at 60°C to remove the solvent to obtain...

Embodiment 2

[0035] Nylon 66 thermoplastic elastomer beads were placed in an autoclave, heated and fed with supercritical CO 2 Fluid, the saturation temperature is 38°C, the saturation pressure is 10MPa, the saturation time is 3h, and then the nylon 66 thermoplastic elastomer beads / CO 2 The mixed material was transferred to a constant temperature silicone oil bath for foaming. The foaming temperature was 100°C, and the foaming time was 80s. Finally, it was placed at room temperature to cool and shape to obtain nylon 66 thermoplastic elastomer microcellular foamed beads. The conductive silver (Ag) slurry was wrapped on the surface of nylon 66 thermoplastic elastomer microcellular foamed beads by dip coating method, and dried at room temperature to obtain silver-coated nylon 66 thermoplastic elastomer microcellular foamed beads; the MWCNTs Dispersed in the PDMS preform solution, stirred ultrasonically for 45min, and then placed in a constant temperature oven at 80°C to remove the solvent to ...

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Abstract

The invention discloses a preparation method of a light flexible isolation type elastomer composite microporous strain sensing material. The preparation method specifically comprises the following steps: step 1, preparing silver-coated thermoplastic elastomer microporous foaming beads; step 2, preparing a PDMS / MWCNT precursor conductive liquid; step 3, mixing the PDMS / MWCNT precursor conductive liquid obtained in the step 2 with a curing agent, stirring for 10-30 minutes, and uniformly mixing to obtain a conductive liquid; and 4, uniformly mixing the silver-coated thermoplastic elastomer microporous beads obtained in the step 1 with the conductive liquid obtained in the step 3, and introducing the obtained mixture into a mold to prepare the light flexible isolation type elastomer compositemicroporous strain sensing material. The prepared isolated elastomer composite microporous strain sensing material has the characteristics of light weight, flexibility, low filling, high sensitivityand the like, and has good application value in the aspects of wearable equipment, human health and motion monitoring, artificial intelligence, functional soles and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer-based strain sensing materials, and relates to a preparation method of a lightweight, flexible isolation type elastomer composite microporous strain sensing material. Background technique [0002] With the rapid development of flexible electronic technology and artificial intelligence, the demand for sensing systems is increasing day by day to achieve intelligent perception of the environment and real-time human-computer interaction. Strain sensing materials are functional materials that can convert external stimuli such as tension, compression, and bending into visible electrical signals. They have good application prospects in soft robots, human-computer interaction, flexible displays, and wearable devices. Traditional metal or semiconductor-based sensing materials have high sensitivity, fast response and good working stability, but their portability, flexibility and wearability are poor, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/18C08J9/12C08J9/224C08J9/236C08L77/06C08L83/04C08L83/07C08K3/04G01B7/16G01L1/18
CPCC08J9/18C08J9/122C08J9/224C08J9/236C08J9/0066G01B7/18G01L1/18C08J2377/06C08J2477/06C08J2383/04C08J2483/04C08J2203/08C08J2203/06Y02P20/54
Inventor 马忠雷魏阿静马建中邵亮向小莲康松磊张梦辉景佳瑶
Owner SHAANXI UNIV OF SCI & TECH
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