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

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...

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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.

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