A method for continuously preparing graphene using a rotary homogenizer

A technology of graphene and homogenizer, which is applied in the field of graphene, can solve the problems of non-continuous production, large lattice defects, and low quality, and achieve the effects of improving utilization rate, weakening interlayer force, and improving performance

Active Publication Date: 2017-09-22
陕西富安长德信息科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims at defects such as low quality, large lattice defects, small size, and non-continuous production of graphene products prepared by mechanical grinding, and proposes a method for continuously preparing graphene using a rotary homogenizer

Method used

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  • A method for continuously preparing graphene using a rotary homogenizer

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Combine flake graphite with nano Na 2 HPO 4 12H 2 O is added to the high-speed mixer by weight ratio 100:1 ~ 10, mixed and dispersed at a speed of 1500rpm for 15min, so that the nano phase change material is evenly dispersed in the graphite layered structure to obtain a premix;

[0029] (2) The premix obtained in step (1) was dispersed and mixed with the intercalation agent hexamethylenediamine at 60°C for 30 minutes to obtain an intercalation graphite mixture; the weight ratio of the premix to the intercalation agent was 100: 1. The nano-phase change material distributed in the graphite layered structure melts and changes from solid to liquid, so that gaps appear between graphite layers, which is conducive to the intercalation agent interspersed in the graphite layered structure and weakens the interlayer force of graphite , which is conducive to the stripping of graphite;

[0030] (3) Add the intercalated graphite mixture obtained in step (3) into a rotary homo...

Embodiment 2

[0034] (1) Combine expanded graphite with nano CH 3 COONa·3H 2 O is added to the high-speed mixing mixer at a weight ratio of 100:4, mixed and dispersed for 30min at a speed of 800rpm, so that the nano phase change material is evenly dispersed in the graphite layered structure to obtain a premix;

[0035] (2) Disperse and mix the premix obtained in step (1) with the intercalation agent m-xylylenediamine for 40 minutes at 60°C to obtain an intercalation graphite mixture; the weight ratio of the premix to the intercalation agent is 100 : 2, the nano-phase change material distributed in the graphite layered structure melts and changes from solid to liquid, so that there is a gap between the graphite layers, which is conducive to the intercalation agent interspersed in the graphite layered structure and weakens the interlayer effect of graphite Force, which is conducive to the peeling of graphite;

[0036] (3) Add the intercalated graphite mixture obtained in step (3) into a rot...

Embodiment 3

[0040] (1) Combining pyrolytic graphite with nano-Na 2 SO 4 10H 2 O is added to the high-speed mixing mixer at a weight ratio of 100:6, mixed and dispersed for 20min at a speed of 1000rpm, so that the nano phase change material is evenly dispersed in the graphite layered structure to obtain a premix;

[0041] (2) Disperse and mix the premix obtained in step (1) with the intercalation agent 2,2,4-trimethyl-1,6-hexanediamine at 50°C for 30 minutes to obtain the intercalated graphite mixture ; The weight ratio of the premix and the intercalation agent is 100:3, and the nano phase change material distributed in the graphite layered structure melts and changes from a solid state to a liquid state, so that gaps appear between the graphite layers, which is conducive to the intercalation agent interspersed in In the layered structure of graphite, the interlayer force of graphite is weakened, which is conducive to the peeling of graphite;

[0042] (3) Add the intercalated graphite m...

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Abstract

The invention belongs to the technical field of graphene and particularly relates to a method for preparing graphene continuously by using a rotary homogenizer. Graphite and a nano phase-change material are mixed uniformly and then are mixed with an intercalator, the mixture is heated at the temperature of 40-80 DEG C, the nano phase-change material is changed into liquids from a solid state, gaps are formed among graphitic layers, the intercalator is expediently intercalated in a layered structure of graphite, the interlayer acting force of the graphite is weakened, stripping of the graphite is facilitated, intercalated graphite is sent to the rotary homogenizer, graphite is continuously sheared and stripped by means of shearing force produced during rotary stirring, the graphite is stripped layer by layer, damage of the mechanical shearing force to a graphene crystal structure is prevented, and the graphene with uniformly distributed layers is prepared. The yield of the graphene prepared with the method is high, the graphene has 10-100 layers and has few structure defects, high-quality graphene is prepared rapidly and continuously, the production cost of the high-quality graphene is greatly reduced, large-scale production of graphene is promoted, and the graphene has remarkable market application value.

Description

technical field [0001] The invention belongs to the technical field of graphene, relates to a method for preparing graphene by mechanical exfoliation, in particular to a method for continuously preparing graphene by using a rotary homogenizer. Background technique [0002] Graphene is a single-atom-thick planar two-dimensional material with a sp2 hybrid carbon atom structure that is exfoliated from graphite materials. In theory, it has a perfect hexagonal network structure and exhibits excellent electronic stability, thermal conductivity, optical performance, mechanical properties etc. Since the discovery of graphene by two scientists from the University of Manchester in 2004 using "tape" mechanical peeling, it has opened an unprecedented research boom in graphene materials. Because graphene has good electrical, optical, mechanical, and thermal properties, as well as strong mechanical strength and flexibility, and many other properties that ordinary materials do not have, i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/19
CPCC01B2204/20C01B2204/32
Inventor 陈庆孙丽枝
Owner 陕西富安长德信息科技有限公司
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