Preparation method of organic-chain-segment-modified graphene oxide

Abstract

The invention discloses a preparation method of organic-chain-segment-modified graphene oxide. According to the invention, graphite is oxidized under the effects of strong oxidizing agents such as concentrated sulfuric acid, sodium nitrate and potassium permanganate; the oxidized graphite is subjected to ultrasonic dispersion in an organic solvent, such that a graphene oxide dispersion system is prepared; diisocyanate and dihydric alcohol are subjected to a reaction; hydroxyacrylate is used for sealing one end; and an NCO group in the organic chain segment is subjected to a reaction with the prepared graphene oxide, such that the organic-chain-segment-modified graphene oxide is prepared. The organic chain segment contains polymerizable double bonds, such that cross-linking polymerization of the modified graphene oxide and other organic materials can be promoted, and composite materials with special properties can be obtained.

Description

technical field [0001] The invention belongs to the technical field of graphene, and in particular relates to a method for preparing modified graphene oxide modified by organic segments. Background technique [0002] Graphene has unique electro-optic properties, good electrical conductivity, light transmission, high chemical stability and thermodynamic stability, making it have very good application prospects in electrodes, high-sensitivity sensors, and high-performance energy storage devices . In addition, graphene also has ultra-high strength. The strong force between carbon atoms makes it the material with the highest mechanical strength known so far, and it may be widely used as an additive in new high-strength composite materials. , Conductive composite materials also have attractive application prospects. However, due to the complete structure of graphene, high chemical stability, its surface is inert, and there is strong van der Waals force between graphene sheets, ...

AI Technical Summary

Problems solved by technology

Stankovichs S et al. modified graphene oxide with isocyanate to obtain a series of products with different side chains. Compared with graphene oxide, the isocyanate modified graphene oxide did not peel off at all in water, but after simple ultrasonic treatment Easily form stable colloidal dispersions in dimethylformamide (DMF), N-methylpyrroline (NMP), dimethylsulfoxide (DMSO) and hexamethylphosphoramide (HMPA)