Flexible conductive polyimide/silver composite nanotube and preparation method thereof

Abstract

The invention provides a flexible conductive polyimide / silver composite nanotube and a preparation method thereof. Firstly, the coaxial electrostatic spinning method is adopted, a polyamic acid solution serves as an outer layer spinning solution, a polyetherimide solution serves as a core layer spinning solution, and polyamic acid / polyetherimide coaxial nano fibers are prepared; then, the nano fibers are soaked in a silver salt solution and a reduction solution for ion exchange and reduction, then inner layer polyetherimide is dissolved out by means of solvent, and the silver-loaded silver-ion-loaded polyamide acid nanotubes are obtained; then, program control gradient temperature increasing thermal treatment is conducted, so polyamide acid is cyclized into polyimide, meanwhile reduction of silver ions and aggregation of silver happens at the same time, and accordingly the polyimide / silver composite nanotube is prepared. The prepared nanotube is formed by compositing polyimide and silver and has good flexibility and electrical conductivity. The method is simple in implementation process, routing is easy, commercial raw materials can be adopted, large-scale preparation is achieved, and application prospects are good.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a flexible conductive polyimide / silver composite nanotube and a preparation method thereof. Background technique [0002] With social development and scientific and technological progress, people's demand for high-efficiency functional materials is becoming more and more urgent, and various new materials and material structures are constantly emerging. Among them, nanotubular materials are a research hotspot in recent years. Nanotubular materials have outstanding surface effects and size effects, and compared with bulk materials, their functions are more excellent, such as gas sensitivity, biosensing, optical properties, etc. Therefore, nanotubular materials have broad application prospects in the fields of catalysis, energy, sensing, medical treatment, filtration, and electronic science. [0003] Nano-silver tubes are a type of nano-tubular material pre...

AI Technical Summary

Problems solved by technology

[0004] There are many preparation methods for silver nanotubes, such as template method, sol-gel method, hydrothermal synthesis method, etc. Among them, the template method is a traditional method, the process is simple and easy, and the product shape is controllable, but it is difficult to obtain long-diameter Relatively large hollow nanotubes, and it is difficult to achieve large-scale large-scale preparation; the sol-gel method has a lower operating temperature and higher purity of the obtained product, but its process is complex, cumbersome, and time-consuming; hydrothermal synthesis The method has controllability and modulability, good dispersibility, but its reaction time is long and the yield is low

At the same time, the silver nanotubes prepared by the above method are relatively brittle, inflexible, easily broken and collapsed, and the preparation of silver nanotubes of a specific size cannot be achieved.

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