Manufacturing method of graphene-doped polyimide composite film

Abstract

The invention discloses a manufacturing method of a graphene-doped polyimide composite film. The manufacturing method comprises the following specific steps: mixing and reacting required graphene with a solvent, diamine and dianhydride by adopting an in-situ polymerization method to prepare polyamic acid with graphene, uniformly applying the polyamic acid to a plane plate by utilizing a film coating machine, putting the plate into a high-temperature oven for imidization to generate required polyimide, finally, taking out the product, stripping a polyimide film on the plate to obtain a required polyimide layer, then putting the polyimide layer in the middle, respectively laying an epoxy resin layer on the upper part and the lower part of the polyimide layer, and carrying out calendaring combination by adopting a calender to obtain the required material. The polyimide film prepared by the method has the advantages of being high in mechanical strength and remarkably improved in conductivity, and is a novel graphene-doped polyimide film.

Description

technical field [0001] The invention relates to a film manufacturing method, in particular to a graphene-doped polyimide composite film manufacturing method. Background technique [0002] Polyimide (PI) refers to a class of polymer materials containing imide rings in the main chain. It is a special polymer material that has been industrialized at present. It has superior physical and mechanical properties, excellent electrical and chemical stability. , is widely used in high-tech fields, and polyimide film is one of the earliest commodities and the largest consumption. This new type of high-temperature-resistant organic polymer film is currently the best film in the world. Insulating materials and one of the most expensive film materials are called "golden films". The excellent performance of polyimide films makes them play an increasingly important role in many fields. Polyimide films are compatible with carbon fiber, aromatic Together with fiber, it is considered to be the t...

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Problems solved by technology

[0003] At present, domestic polyimide films have shortcomings such as poor product quality, unstable comprehensive performance, insufficient product refinement, and few varieties, which affect their applications. Graphene, as the thinnest two-dimensional material so far, has excellent Mechanical properties, electrical properties, optical properties and thermal properties have become the focus of research on new materials today. Polymer materials are widely used due to their characteristics of easy molding and low cost. However, due to the low mechanical properties of polymer materials, The inherent insulation and other characteristics cannot meet the applications in some fields, and the use of carbon nanomaterials to modify and strengthen polymers is considered to be a very effective way