The invention relates to the technical field of
electric heating materials, in particular to an organic-inorganic composite electrothermal
film material and a preparation method and application thereof. The organic-inorganic composite electrothermal film comprises a
polyimide fiber skeleton, an electrothermal layer poured on the skeleton to form a film, and a counter
electrode arranged on the electrothermal layer. The
polyimide fiber skeleton is prepared by an electrostatic
spinning method; the
electric heating layer is made of low-melting-point glass
powder, conductive filler and a liquid dispersing agent; and the counter
electrode is connected with the
electric heating layer in a curing manner. Wherein the raw materials are uniformly mixed according to a certain proportion to obtain the inorganic composite electrothermal
film material ink, the inorganic composite electrothermal
film material ink is poured on the surface of a
polyimide fiber skeleton, and the inorganic composite electrothermal film is obtained after the inorganic composite electrothermal film material ink is dried at 300-400 DEG C for 2-4 h and then naturally cooled. The organic-inorganic composite electrothermal film material provided by the invention has the advantages of high
temperature resistance, strong
flame retardance, long service life, good safety, excellent mechanical properties and the like, and is suitable for the field of high-temperature heating films.