Preparation method of modified superfine graphene

Abstract

The invention discloses a preparation method of modified superfine graphene. The preparation method includes the following steps that (1), graphene is subjected to grinding, specifically, the grapheme is placed in a grinder and is ground to obtain graphene pasty material; (2), the graphene pasty material is subjected to stage treatment, specifically, the graphene pasty material is put into a high-speed centrifugal settling type grader, the graphene pasty material whose particle diameter is less than or equal to 1 [mu]m is concentrated in the middle of the grader, and is stored in a storage tank after being led out; and (3), the graphene pasty material whose particle diameter is less than or equal to 1 [mu]m is subjected to kneading treatment, specifically, the graphene pasty material whose particle diameter is less than or equal to 1 [mu]m is put into a kneading reaction device, a surface treating agent is added, the kneading treatment is conducted, the superfine graphene is obtained after being kneaded, and in the period, the accumulating density of superfine graphene powder is controlled within 0.5-1.2. According to the preparation method, the prepared modified superfine graphene particles have the characteristics of being good in dispersing performance, low in accumulating density and the like. Partial shielding and disturbing to electromagnetic waves and wireless signals are achieved, and the effect of gaining advantages in information competition is realized.

Description

technical field [0001] The invention relates to a preparation method of modified ultrafine graphene. Background technique [0002] Smog is a natural phenomenon of air pollution. The particles in the smog are generally PM2.5, that is, the particle diameter is less than 2.5 microns. According to this phenomenon, materials with anti-electromagnetic wave and signal interference can be processed into particles with a diameter of 1-2 microns or less. Through appropriate surface treatment technology, they can form airgel fog with airflow and water molecules in the atmosphere. haze. Because these particles have the effect of interfering with electromagnetic waves, the formed smog has the desired effect of resisting electromagnetic waves and signal interference, which can play a certain role in winning the information war. [0003] However, at present, such man-made smog has poor particle dispersion performance, high bulk density, and poor surface fluidity, resulting in weak anti-e...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the technical problem that the current man-made smog has poor particle dispersion performance, high bulk density, and poor surface fluidity, resulting in weak ability to resist electromagnetic waves and signal interference.