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Method for chemical modification of surface of graphene oxide and application

A graphene surface, chemical modification technology, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve problems such as poor dispersion and weak interface bonding

Inactive Publication Date: 2018-07-31
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a triazine derivative chemically modified graphite oxide in order to solve the problems of poor dispersion caused by severe aggregation of existing graphene in epoxy resin and weak interfacial bonding of graphene / epoxy resin composites Methods and applications of alkenes

Method used

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  • Method for chemical modification of surface of graphene oxide and application
  • Method for chemical modification of surface of graphene oxide and application
  • Method for chemical modification of surface of graphene oxide and application

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specific Embodiment approach 1

[0076] Specific embodiment one: the method for chemically modifying the surface of graphene oxide in this embodiment is carried out according to the following steps;

[0077] Step 1, preparing graphene oxide:

[0078] ①. Add graphite, sodium nitrate and concentrated sulfuric acid into a three-necked flask, place the three-necked flask in an ice-water bath at 0°C-5°C and stir for 30min-40min at a stirring speed of 300r / min-400r / min. Obtain reaction solution I;

[0079] The massfraction of the concentrated sulfuric acid described in step 1. is 96%~98%;

[0080] The quality of the graphite described in step 1. and the volume ratio of the concentrated sulfuric acid are (6g~8g):(360mL~500mL);

[0081] Step 1. The quality of sodium nitrate described in 1. and the volume ratio of the concentrated sulfuric acid are (2g~4g):(360mL~500mL);

[0082] ②. Add potassium permanganate to the reaction solution I, then place the three-neck flask in an ice-water bath at 0°C to 5°C and stir for...

specific Embodiment approach 2

[0119] Embodiment 2: This embodiment is different from Embodiment 1 in that: freeze-dry at a temperature of -10°C to -5°C for 24h to 36h. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0120] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the drying process described in Step 3 ③ is: drying in a vacuum oven at 80°C to 90°C for 4h to 6h. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention discloses a method for chemical modification of the surface of graphene oxide and application, and relates to a method for modification of the surface of graphene oxide and application.The problem that due to the fact that aggregation of graphene in epoxy resin is serious, the dispersity is poor, the interface bonding of a graphene / epoxy resin composite material is weak is solved. The method comprises the steps of 1, preparing graphene oxide; 2, performing hydroxylation processing on the graphene oxide; 3, modifying the graphene oxide through cyanuric chloride; 4, modifying thegraphene oxide through diethylenetriamine. The application is the application of a triazine derivative chemical modified graphene oxide in preparing the graphene oxide / epoxy resin composite material.The covalent grafting method is adopted, cyanuric chloride and diethylenetriamine are grafted to the surface of the graphene oxide, the triazine derivative modified graphene oxide is obtained, and thedispersity and the interface bonding performance of the graphene oxide in the composite material are improved. The method is used for chemical modification of the surface of the graphene oxide and preparation of the graphene oxide / epoxy resin composite material.

Description

technical field [0001] The invention relates to a method and application of graphene oxide surface modification. Background technique [0002] Graphene is a nano-scale material with high strength. Graphene-reinforced epoxy resin composites are widely used in aerospace, machinery manufacturing, construction and other fields. However, graphene has the problems of severe aggregation, poor dispersion and weak interfacial bonding in epoxy resin, which limits the full use of the excellent properties of graphene / epoxy resin composites. In order to solve the above problems, the method of modifying the surface of graphene is usually adopted, mainly including non-covalent modification and covalent modification. Non-covalent modifications link molecules through weak binding interactions, such as hydrogen bonds, van der Waals forces, or electrostatic adsorption. Covalent modification is to effectively control the physical and chemical properties of graphene composites through the chem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/46C09C3/06C09C3/08C08K9/02C08K9/04C08K3/04C08L63/00C01B32/198
CPCC01B32/198C01P2006/22C08K3/04C08K9/02C08K9/04C09C1/46C09C3/006C09C3/06C09C3/08C08L63/00
Inventor 马丽春郭世梅宋国君谷正王刚王明业石龙龙
Owner QINGDAO UNIV
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