Bionic shell-like graphene/styrene-butadiene rubber composite electrothermal material and preparation method

Abstract

The invention relates to a bionic shell-like graphene / styrene-butadiene rubber composite electrothermal material and a preparation method, aiming at endowing the composite material with excellent mechanical properties and flexible electrothermal properties through the selection of raw materials and the structure of the shell-like structure. The preparation method includes: (1) scraping and curing the styrene-butadiene latex on the surface of a smooth substrate to obtain a styrene-butadiene rubber layer; (2) adding graphene nanosheets to the styrene-butadiene latex and ultrasonically treating it to obtain a mixed liquid. (3) Scrape-coat the mixed solution prepared in step (2) on the surface of the styrene-butadiene rubber layer prepared in step (1), and obtain a double-layer graphene / styrene-butadiene rubber composite material after curing; Repeat steps (1), (2) and (3) on the graphene / styrene-butadiene rubber surface of the composite material to obtain a multilayer shell-like graphene / styrene-butadiene rubber electrothermal material. The composite material has excellent mechanical properties and flexible electrothermal properties; the method has a simple preparation process and is easy for industrial production.

Description

technical field [0001] The invention belongs to the field of composite material science and technology, and in particular relates to a bionic shell-shaped graphene / styrene-butadiene rubber composite electrothermal material and a preparation method thereof. Background technique [0002] Electrothermal materials can convert electrical energy into thermal energy, and are widely used in hyperthermia, temperature maintenance, thermal fabrics, microchannel chips, sensor heating and other fields. The electrothermal materials currently used basically use metal wires as heating materials. However, the metal wire is easily oxidized under high temperature conditions, resulting in a decrease in heating performance; and the metal wire electrothermal material cannot withstand repeated bending and stretching, and has poor flexible electrothermal performance. [0003] Shells are made up of alternating arrangements of soft protein and hard aragonite crystals. This unique structure endows th...

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Problems solved by technology

However, the metal wire is easily oxidized under high temperature conditions, resulting in a decrease in heating performance; and the wire electric heating material cannot withstand multiple bending and stretching, and has poor flexible electric heating performance

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