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Hybrid filler/silicone rubber flexible force-sensitive conductive composite material prepared by cyclic stretching method and preparation method of material

A conductive composite material and silicone rubber technology, applied in the field of flexible composite materials, can solve the problems of complex methods, poor conductivity, sensitivity and stability, and achieve the purpose of promoting orientation, improving resistivity and sensitivity, and improving the conductive network of fillers. Effect

Inactive Publication Date: 2019-10-08
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above preparation methods, the conductive material is compounded with the polymer matrix by assembly, solution or melting method, the method is complicated, and the conductivity, sensitivity and stability are poor.

Method used

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  • Hybrid filler/silicone rubber flexible force-sensitive conductive composite material prepared by cyclic stretching method and preparation method of material
  • Hybrid filler/silicone rubber flexible force-sensitive conductive composite material prepared by cyclic stretching method and preparation method of material
  • Hybrid filler/silicone rubber flexible force-sensitive conductive composite material prepared by cyclic stretching method and preparation method of material

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Example 1, weighing polydimethylsiloxane, 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane, crosslinking agent, carbon fiber, and modified carbon nanotubes , ultrasonically dispersed and mixed evenly, poured into a tetrafluoroethylene mold, and vacuumized for 20 minutes to remove air bubbles, the vacuum degree was 0.06MPa, and then crosslinked at 100°C for 0.5h to form a crosslinked shape; the weight ratio of the components is silicone rubber:crosslinked Linking agent: carbon fiber: carbon nanotube=100:10:1:1; Wherein the carbon nanotube is modified by sodium cholate; the above sample is cut into splines whose length and width are 6cm and 2cm respectively, and then The test machine was stretched 100 times at a strain of 50% at 1 Hz.

Embodiment 2

[0022] Example 2. Weigh methylvinyl silicone rubber, dicumyl peroxide, carbon fiber, and modified carbon nanotubes, and after ultrasonic dispersion and mixing, pour them into a tetrafluoroethylene mold, and vacuumize for 20 minutes to remove air bubbles. The density is 0.06MPa, and then cross-linked at 100°C for 0.5h to form a cross-linked shape; the weight ratio of the components is silicone rubber: cross-linking agent: carbon fiber: carbon nanotubes = 100:10:5:5; where carbon nanotubes It was modified by sodium cholate; the above sample was cut into strips whose length and width were 6cm and 2cm respectively, and then cyclically stretched for 1000 times at 5Hz and 5% strain on a universal testing machine.

Embodiment 3

[0023] Example 3. Weigh methylphenylvinyl silicone rubber, dicumyl peroxide, carbon fiber, and modified carbon nanotubes, mix them uniformly by ultrasonic dispersion, pour them into a tetrafluoroethylene mold, and vacuumize for 20 minutes to remove air bubbles , the vacuum degree is 0.06MPa, and then cross-linked at 100°C for 0.5h to form a cross-linked shape; the weight ratio of the components is silicone rubber: cross-linking agent: carbon fiber: carbon nanotubes = 100:10:2:2; where carbon The nanotubes were modified by sodium cholate; the above samples were cut into strips with a length and width of 6cm and 2cm respectively, and then stretched cyclically for 2000 times at 10Hz and a strain of 10% on a universal testing machine.

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Abstract

The invention relates to a hybrid filler / silicone rubber flexible force-sensitive conductive composite material prepared by a cyclic stretching method and a preparation method of the material. The conductive composite material can be used in the fields of flexible force-sensitive sensing and the like. The method includes adding a carbon nano pipe, a cross-linking agent and carbon fiber into silicone rubber, performing ultrasonic action while stirring; then cross-linking at 100 DEG C for 0.5 hour to form a flexible silicone rubber conductor with hybrid fillers; cutting the sample into splines with length and width of 6cm and 2cm respectively, and then carrying out cyclic tensile relaxation treatment on a universal testing machine, wherein the specific parameters are as follows: strain rangeis 5-50%; and the frequency is 1-10Hz and the cycle number is 100-2000. According to the method, the synergistic effect of the hybrid fillers is utilized to reduce the dosage of the fillers, and thedistribution of carbon materials in the matrix can be adjusted by adopting a repeated stretching method, and thus the conductive network of the fillers can be improved, the orientation of the fillersis promoted to a certain extent, and the resistivity and sensitivity of the composite material are improved.

Description

technical field [0001] The invention relates to a flexible force-sensitive conductive composite material and a preparation method thereof, in particular to a hybrid filler / silicone rubber flexible force-sensitive conductive composite material based on a cyclic stretching method and a preparation method thereof, belonging to the technical field of flexible composite materials. Background technique [0002] Flexible force-sensitive materials are important basic materials for wearable electronic materials at present, and have important application prospects in the field of future technological development. Among them, polymer-based conductive composites are a good way to prepare flexible force-sensitive materials. However, many flexible force-sensitive materials currently have problems such as low resistivity and poor sensitivity, which limit their further applications. [0003] Existing: CN201710822776.5 discloses that a graphene and a cracked nickel film are assembled onto a...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/07C08K5/14C08K7/06C08K9/04C08K3/04C08K13/06
CPCC08K5/14C08K7/06C08K9/04C08K13/06C08K3/041C08L83/04
Inventor 张荣胡圣飞刘清亭付旭东胡海龙许星烨应程
Owner HUBEI UNIV OF TECH
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