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A method for covalently modifying graphene oxide with a six-membered heterocycle

A technology of covalent modification and six-membered heterocycle, which is applied in chemical instruments and methods, dyeing low-molecular organic compound treatment, inorganic pigment treatment, etc., can solve the problems of poor dispersion and interface strength, and achieve improved surface activity and consumption The effect of lower energy consumption and improved bending strength

Active Publication Date: 2021-06-08
青岛碳智新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor dispersion and interface strength of existing graphene in composite materials, and provide a method for covalently modifying graphene oxide with a six-membered heterocycle

Method used

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  • A method for covalently modifying graphene oxide with a six-membered heterocycle
  • A method for covalently modifying graphene oxide with a six-membered heterocycle
  • A method for covalently modifying graphene oxide with a six-membered heterocycle

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specific Embodiment approach 1

[0054] Specific embodiment one: This embodiment is a method for covalently modifying graphene oxide with a six-membered heterocyclic ring, which is completed in the following steps:

[0055] 1. Preparation of graphene oxide:

[0056] 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;

[0057] The massfraction of the concentrated sulfuric acid described in step 1. is 96%~98%;

[0058] The quality of the graphite described in step 1. and the volume ratio of the concentrated sulfuric acid are (6g~8g):(360mL~500mL);

[0059] Step 1. The quality of sodium nitrate described in 1. and the volume ratio (2g~4g) of the vitriol oil: (360mL~500mL);

[0060] 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 the r...

specific Embodiment approach 2

[0095] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the volume ratio of the mass of lithium aluminum hydride described in step 2 ① to tetrahydrofuran is (4.5g-5g): (110mL-120mL). Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0096] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the mass ratio of the graphene oxide described in step two 2. to the volume ratio of tetrahydrofuran in step two 1. is (2.5g~3g) : (110mL ~ 120mL). Other steps are the same as those in Embodiment 1 or 2.

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Abstract

A method for covalently modifying graphene oxide with a six-membered heterocycle relates to a method for modifying graphene oxide. The purpose of the invention is to solve the problems of poor dispersion and interface strength of the existing graphene in the composite material. Methods: 1. Preparation of graphene oxide; 2. Hydroxylation treatment of graphene oxide; 3. cyanuric chloride modified graphene oxide; 4. Trihydroxyaminomethane modified graphene oxide to obtain a six-membered heterocyclic covalently Graphene oxide. The six-membered heterocyclic covalently modified graphene oxide prepared by the invention has better mechanical properties when combined with epoxy resin. Compared with epoxy resin, the tensile strength is increased by more than 38%, and the bending strength is increased by more than 46%. The invention can obtain graphene oxide covalently modified by six-membered heterocycles.

Description

technical field [0001] The invention relates to a method for modifying graphene oxide. Background technique [0002] Graphene is a nanomaterial with unique structure, layer atomic thickness, high strength, high electrical and thermal conductivity and other excellent properties. It has a wide range of applications in aerospace, machinery manufacturing, construction and other fields. In addition, there have been many experiments demonstrating that graphene and graphene oxide sheets are the most promising reinforcement materials in polymer composites because of their excellent mechanical properties. However, there are two main problems that limit the mechanical properties and applications of graphene-epoxy composites: 1) Due to the strong van der Waals force, graphene is prone to irreversible aggregation in the composite, which will lead to poor graphene in the matrix. 2) Due to the inert surface of graphene, the interfacial interaction with the substrate is weak, which also l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/46C09C3/06C09C3/08C08K9/04C08K9/02C08K3/04C08L63/00
CPCC08K9/02C08K9/04C09C1/46C09C3/006C09C3/06C09C3/08C08K3/042C08L63/00
Inventor 马丽春宋国君谷正田崇澳王雪洁王宇航
Owner 青岛碳智新材料科技有限公司