A kind of flexible conductive film and preparation method thereof

Abstract

The invention provides a flexible conductive film capable of large-scale production and a preparation method thereof. In the flexible conductive film, metal layers are plated on the upper and lower surfaces of the substrate, and a reinforcing layer is provided between the substrate and the metal layer, so that the gap between the conductive layer and the substrate is Has a strong binding force. The flexible conductive film has excellent mechanical properties and conductive properties, the conductive layer and the reinforcing layer are evenly and densely distributed on the two surfaces of the flexible substrate, and the surface density of the flexible conductive film is 0.52-4.5 mg / cm 2 , the resistivity can reach 2×10 ‑8 ~6×10 ‑8 Ω·m, with lower areal density and better electrical conductivity. Both the conductive layer and the reinforcing layer are prepared by vacuum evaporation. This method has simple process, high efficiency, low cost, and no strict requirements on the preparation environment. It can be industrialized on a large scale. The vacuum degree is high, and the obtained coating contains oxygen. Low amount, high density, ensure uniform and dense deposition of metal conductive layer, and fully ensure the excellent conductivity of the film.

Description

technical field [0001] The invention relates to the technical field of conductive materials, in particular to a flexible conductive film and its preparation method and application. Background technique [0002] With the rapid development of electronic technology, electronic devices and equipment are gradually developing in the direction of mobility, lightness, and flexibility, so new flexible conductive film materials have been developed rapidly. Compared with traditional hard conductive materials, new flexible conductive materials not only have low surface resistance, but also are easy to bend and light, and have become a research hotspot in recent years. [0003] Based on the excellence of flexible conductive films, the preparation methods of various flexible conductive films have also been proposed, such as CN111446453A proposed to obtain flexible conductive films by the method of chemical deposition, although this method has prepared flexible conductive films, there are ...

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Problems solved by technology

[0003] Based on the excellence of flexible conductive films, the preparation methods of various flexible conductive films have also been proposed, such as CN111446453A proposed to obtain flexible conductive films by the method of chemical deposition, although this method has prepared flexible conductive films, there are also the following Problems: ①The processing steps are cumbersome, take a long time, and the efficiency is low; ②Acid treatment is required in the preparation process, and large-scale production will have a great impact on the environment

CN 111312431A proposes to prepare a flexible conductive film through anisotropic nanocellulose, which also has the disadvantages of complicated preparation process and low tensile strength of flexible cellulose film

Similarly, CN106158144A also proposes to prepare ultra-thin ultra-flexible graphene conductive film by chemical vapor deposition method, but it also has high equipment requirements for preparing graphene by chemical vapor deposition, and low preparation efficiency. At the same time, the prepared graphene needs to be transferred to The surface of the substrate will cause damage to the graphene surface, which will affect the uniformity of the film's conductivity

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