Multifunctional super-hydrophobic conductive rubber composite material and preparation method thereof

A technology of conductive rubber and composite material, applied in the field of multifunctional super-hydrophobic conductive rubber composite material and its preparation, can solve the problem of weak electrostatic interaction force between conductive filler and polyurethane surface, damage to CPC conductive performance and sensing performance stability, stability resistance (low friction resistance and torsion resistance, etc.), to achieve the effect of broadening environmental applicability, excellent elongation at break and tensile recovery performance, and a wide range of applications

Active Publication Date: 2020-05-01
YANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the composite material prepared by the above method, the electrostatic interaction between the conductive filler and the surface of the polyurethane is relatively weak, and the stability of the material (friction resistance and twist resistance) is not strong, and this material can only respond to pressure and does not have stretching properties. Responsiveness
[0005] In addition, existing CPC-based sensors have limited applications in extreme environments
For example, in a humid environment, especially in a high humidity environment, polymers and conductive fillers may be hygroscopic, which to some extent destroys the stability of CPC's conductivity and sensing performance.
In addition, when the ambient temperature is lower than the glass transition temperature of the polymer elastomer, the molecular chain movement is frozen, and the CPC may harden or even lose its elasticity, which limits the practical application of CPC sensors.

Method used

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  • Multifunctional super-hydrophobic conductive rubber composite material and preparation method thereof
  • Multifunctional super-hydrophobic conductive rubber composite material and preparation method thereof
  • Multifunctional super-hydrophobic conductive rubber composite material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] (1) Preparation of rubber foam / silver nanoparticle composite material: get 1g silver trifluoroacetate powder and be dissolved in 9g tetrahydrofuran, ultrasonic it is dissolved, obtain uniform silver trifluoroacetate solution; Will be made of 40% natural rubber and 60% butyl The rubber foam composed of styrene rubber is soaked in the silver trifluoroacetate solution for 1min. Then, put the silver precursor-adsorbed foam into 50wt% hydrazine hydrate reducing solution (water: absolute ethanol = 1:1) for reduction for 30 minutes, then take it out and rinse it with deionized water, and dry it under air conditions to obtain a composite material . The scanning electron microscope image of the prepared material is shown in image 3 As shown in a, the protruding silver nanoparticles form a multi-level structure. (2) Contact angle test, drop 5 μL of deionized water on the surface of the material to test the contact angle, the measurement results are as follows image 3 As shown ...

Embodiment 2

[0034] (1) Preparation of rubber foam / silver nanoparticle composite material: get 1g silver trifluoroacetate powder and be dissolved in 9g tetrahydrofuran, ultrasonic it is dissolved, obtain uniform silver trifluoroacetate solution; Will be made of 40% natural rubber and 60% butyl The rubber foam composed of styrene rubber is soaked in the silver trifluoroacetate solution for 5min. Then, put the silver precursor-adsorbed foam into 50wt% hydrazine hydrate reducing solution (water: absolute ethanol = 1:1) for reduction for 30 minutes, then take it out and rinse it with deionized water, and dry it under air conditions to obtain a composite material . The scanning electron microscope image of the obtained material is shown in image 3 As shown in c, the silver nanoparticles are covered by the polymer matrix precipitated during the phase separation process, which increases the interaction force between it and the polymer matrix. The small pores formed during the phase separation ...

Embodiment 3

[0036] (1) Get 1g silver trifluoroacetate powder and be dissolved in 9g tetrahydrofuran, ultrasonic dispersion makes it dissolve, obtains uniform silver trifluoroacetate solution; The rubber foam that will be made up of 40% natural rubber and 60% styrene-butadiene rubber in trifluoroacetic acid Soak in silver solution for 10 minutes. Then, put the rubber foam that has absorbed the silver precursor into 50wt% hydrazine hydrate reducing solution (water: absolute ethanol = 1:1) to reduce for 20min, then take it out and rinse it with deionized water, and dry it under air conditions to obtain Composite material, the surface scanning electron microscope picture of the obtained composite material is as follows image 3 As shown in e, the silver nanoparticles are covered by the polymer matrix precipitated during the phase separation process, which increases the interaction force between it and the polymer matrix. The small pores formed during the phase separation form a multi-level s...

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Abstract

The invention discloses a multifunctional super-hydrophobic conductive rubber composite material and a preparation method thereof. The method comprises the following steps: soaking rubber foam consisting of 40% of natural rubber and 60% of butadiene styrene rubber into a tetrahydrofuran solution of silver trifluoroacetate; and reducing the silver precursor, and carrying out phase separation on thepartially dissolved polymer matrix in a non-solvent in the reducing solution to obtain the super-hydrophobic conductive rubber foam/silver nanoparticle composite material. The composite material disclosed by the invention has tensile and compression response properties, can be used for detecting human motion by wearable electronic equipment, and is good in stability, excellent in cycle performance and wide in application range; and the material has super-hydrophobic, electric-heating and photo-thermal effects, so that the application of the material in severe environments is broadened.

Description

technical field [0001] The invention belongs to the technical field of preparation of conductive polymer composite materials, and relates to a multifunctional superhydrophobic conductive rubber composite material and a preparation method thereof. Background technique [0002] Conductive polymer composite (CPC) has been widely used in flexible deformation sensors due to its light weight, easy processing and molding, low cost, and stable sensing performance. The sensing signal is based on the resistance of the composite material when stretched or compressed. Variety. The CPC material will deform during stretching or compression, which affects its conductive network to a certain extent, thereby causing its resistance to change. When the conductive polymer material deforms and recovers, the conductive network also recovers, that is, the resistance returns to its original value after strain recovery. [0003] Existing CPC strain sensors usually incorporate conductive fillers (s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/40C08L9/06C08L7/00C08K3/08
CPCC08J9/40C08J2309/06C08J2407/00C08K2003/0806C08K2201/001C08K2201/011
Inventor 高杰峰汪玲王浩黄学武
Owner YANGZHOU UNIV
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