Diaminobenzene-functionalized graphene nanomaterial and preparation method thereof

A technology of diaminobenzene and nanomaterials, applied in the direction of fibrous fillers, dyed low-molecular-weight organic compounds, etc., can solve the problems of high toxicity of coupling reagents, complicated operation and high reaction temperature, and achieves improved thermal stability and easy control. , Improve the effect of interface compatibility

Inactive Publication Date: 2015-07-08
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The present invention provides a diaminobenzene functionalized graphene nanomaterial aiming at the shortcomings of the prior art, such as high reaction temperature, cumbersome operation, and high toxicity of coupling reagents.

Method used

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  • Diaminobenzene-functionalized graphene nanomaterial and preparation method thereof
  • Diaminobenzene-functionalized graphene nanomaterial and preparation method thereof
  • Diaminobenzene-functionalized graphene nanomaterial and preparation method thereof

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preparation example Construction

[0032] Such as figure 1 Shown, a kind of diaminobenzene functionalized graphene nano material and preparation method thereof, the method comprises the following steps:

[0033] Step 1, adopt the improved Hummers method to prepare graphite oxide solid with natural graphite powder;

[0034] Step 2. Ultrasound for 2-10 h to prepare a DMF suspension of graphene oxide, the ratio of graphite oxide to DMF solvent is 7.5-15 mg / mL;

[0035] Step 3. Prepare the DMF solution of PA, the ratio of PA to DMF solvent is 1:10~1:500 g / mL, and the stirring temperature range is 25~80 °C; PA is p-phenylenediamine, m-phenylenediamine and o-phenylenediamine Any one of the diamines;

[0036] Step 4. Mix the suspension in step 2 with the PA solution in step 3. The mass ratio of graphene oxide to PA is 1:10~10:1, heat to 70~100°C and stir, and the reaction time is 5~24 h;

[0037] Step 5, filter under reduced pressure, wash and dry to obtain the diaminobenzene functionalized graphene nanomaterial. ...

Embodiment 1

[0039] The first step, the preparation of graphite oxide solid;

[0040] At 80 °C, 20 g of natural graphite was pre-oxidized with 30 mL of concentrated sulfuric acid, 10 g of potassium persulfate and 10 g of phosphorus pentoxide, washed with water to pH = 7, and dried overnight at room temperature for use;

[0041] Cool 460 mL of concentrated sulfuric acid to about 0 °C, then add 20 g of pre-oxidized graphite into it, slowly add 60 g of potassium permanganate, so that the temperature of the system does not exceed 20 °C, after the addition is completed, raise the temperature to 35 °C, and stir After 2 h, 920 mL of deionized water was slowly added in batches so that the system temperature did not exceed 98 °C. After stirring for another 15 minutes, 2.8 L of deionized water and 50 mL of 30% hydrogen peroxide were added. The resulting bright yellow suspension was filtered under reduced pressure and washed. Until there is no sulfate ion in the filtrate, and when it is ...

Embodiment 2

[0049] The first to third steps are the same as steps one to three in Example 1.

[0050] In the fourth step, the p-phenylenediamine solution in the third step was slowly added dropwise to the GO suspension prepared in the second step, heated to 70 °C, and vigorously stirred for 24 h;

[0051] The fifth step is the same as step five in Example 1.

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Abstract

The invention discloses a diaminobenzene-functionalized graphene nanomaterial and a preparation method thereof. The functionalized graphene nanomaterial is of a nanometer hybrid structure established by modifying diaminobenzene on the surface and edge of graphene oxide by using a scientific comprehensive organic covalent nucleophilic addition and non-covalent electrostatic self-assembly synchronous functionalization technology. The thermal stability of the hybrid material synthesized by the invention is greatly improved as comparison with that of graphene oxide, and the covering amount of diaminobenzene on the surface of graphene oxide can be regulated through changing the reaction temperature; in addition, the synthesis step is simple and efficient; and the diaminobenzene-functionalized graphene nanomaterial is easily prepared on a large scale and is particularly suitable for application as a flame-retardant material and a polymer-based flame-retardant composite nanomaterial so as to have relatively good application prospects and economic benefits.

Description

technical field [0001] The invention relates to a functionalized graphene nano material and a preparation method thereof, in particular to a diaminobenzene functionalized graphene nano material and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Graphene, as a new two-dimensional nanomaterial, has become a hot nanomaterial building block. Graphene-based functional modification is an important stage in the application process of graphene materials because it can effectively solve the performance defects of graphene such as easy agglomeration and chemical inertness. Graphene research as a star material has become one of the frontiers of world technological innovation. [0003] At present, in addition to the more expensive CVD method that can prepare graphene in large quantities, another important method is to prepare graphite oxide by deep oxidation of graphite, and then prepare graphene and its derivatives in large ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K3/04C08L101/00C09C1/46C09C3/08
Inventor 张树鹏宋海欧高娟娟钱悦月刘茂祥
Owner NANJING UNIV OF SCI & TECH
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