A kind of water-proof transparent polyimide film and its preparation method and application

Abstract

The invention discloses a water-proof transparent polyimide film. The invention also discloses a method for preparing the above-mentioned water-repellent transparent polyimide film, which includes the following steps: S1, mixing the quaternary ammonium salt intercalation-modified nano-mica powder dispersion with diamine monomer and dianhydride monomer in sequence , react in an inert gas atmosphere to obtain a polyamic acid solution; S2, mix the polyamic acid solution with a diamine monomer, react, and then add a silane coupling agent to continue the reaction to obtain a solution A; S3, mix solution A with a normal The ethyl silicate was mixed evenly, and the solution B was obtained by standing still; the solution B was coated on the surface of the substrate, defoamed, imidized, cooled to room temperature, and peeled off to obtain a water-proof transparent polyimide film. The invention also discloses the application of the above water-proof transparent polyimide film. The invention is transparent and has good performance of blocking water and oxygen.

Description

Water-proof transparent polyimide film, preparation method and application thereof technical field The present invention relates to polyimide technical field, relate in particular to a kind of water-proof transparent polyimide film and preparation method thereof law, application. Background technique With the continuous deepening of research on materials and device structures and the continuous progress of device preparation technology, organic electrical The flexibility and transparency of electroluminescent devices, liquid crystal displays and other devices have become an inevitable development trend. Polyimide has protruding The outstanding thermal stability and dimensional stability, as well as good molecular structure designability and other characteristics, are considered to be flexible organic electronics. It is one of the best choices of substrate materials for electroluminescent devices. But the barrier property of polyimide is relatively poor, often can'...

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Problems solved by technology

[0003] However, the barrier performance of polyimide is relatively poor, and it is often unable to block the erosion of water on the cathode of the device, organic light-emitting materials, etc., which will significantly reduce the life of organic electroluminescent devices, liquid crystal displays and other devices, and it is difficult to meet the internal requirements of the device. structure protection

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