Method for preparing three-dimensional graphene/high molecular polymer composite material by reinforcing three-dimensional graphene skeleton structure

Abstract

A method for preparing a three-dimensional graphene / high molecular polymer composite material by reinforcing a three-dimensional graphene skeleton structure includes adding carbon nanofibers into graphene oxide, adding a reducing agent and high molecular polymer, and preparing that three-dimensional graphene / high molecular polymer composite material; 3-dimensional graphene aerogel are prepared byadding carbon nanofibers into that 3-dimensional graphene for the first time and drying under normal pressure; Polymer-encapsulated three-dimensional graphene aerogels were used to prepare compositesfor the first time. Carbon nanofibers and graphene have the same preparation method and source, so they have similar properties with graphene. The addition of carbon nanofibers has little effect on the conductivity of graphene, and the preparation process reduces the cost of drying process, which provides a new method for the production of three-dimensional graphene-based composites.

Description

technical field [0001] The invention relates to a method for preparing a three-dimensional graphene / polymer composite material by enhancing a three-dimensional graphene skeleton structure, and belongs to the development field of flexible conductive composite materials. Background technique [0002] The thickness of graphene is only 0.35nm, which is one of the thinnest materials in the world. Its stable regular hexagonal crystal structure endows graphene with many unique properties. If it has excellent electrical, mechanical, and thermal properties (thermal conductivity is 5300W / (m K)), electrons pass through graphene with almost no resistance, less heat generated, and high electrical conductivity. Excellent, can be used as conductive and thermally conductive materials; and since graphene is composed of a single layer of carbon atoms with sp 2 It is connected by a hybrid method, and the overall internal structure is honeycomb, which determines that it has a large specific su...

AI Technical Summary

Problems solved by technology

Freeze-drying refers to using the principle of ice crystal sublimation to directly sublimate the moisture in the material from a solid state to a gaseous state without ice melting in a high vacuum environment, also known as freeze-sublimation drying. Although this method can maintain the original chemical composition and Physical properties, but high cost, time-consuming, energy-consuming, and low efficiency; supercritical drying refers to controlling the pressure and temperature to make the solvent reach its own critical point during the drying process and complete the supercritical transformation of gas-liquid

Although the solvent has no obvious surface tension in this process, the equipment used in this drying method is an autoclave, which requires high sealing performance, long cycle time and low output.

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