Hybrid nanomaterial of melamine chemically-modified graphene oxide and preparation method of hybrid nanomaterial

A nano-hybrid material, melamine chemical technology, applied in chemical instruments and methods, nanotechnology for materials and surface science, inorganic chemistry, etc., can solve the problems of cumbersome operation, high toxicity of coupling reagents, high reaction temperature, etc. To achieve the effect of simple operation, improved thermal stability and easy control

Inactive Publication Date: 2013-08-14
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 aims at the deficiencies in the prior art such as high reaction temperature, cumbersome operation

Method used

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  • Hybrid nanomaterial of melamine chemically-modified graphene oxide and preparation method of hybrid nanomaterial
  • Hybrid nanomaterial of melamine chemically-modified graphene oxide and preparation method of hybrid nanomaterial
  • Hybrid nanomaterial of melamine chemically-modified graphene oxide and preparation method of hybrid nanomaterial

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preparation example Construction

[0029] like figure 1 Shown, a kind of nano-hybrid material of melamine chemically modified graphene oxide and preparation method thereof, the method comprises the following steps:

[0030] Step 1, adopt the improved Hummers method to prepare graphite oxide solid with natural flake graphite powder;

[0031] Step 2, under ultrasonication for 3~10h, prepare graphene oxide DMF suspension, the ratio of graphite oxide and DMF solvent is 7.5~15 mg / mL;

[0032] Step 3. Prepare a DMSO solution of melamine (MA); the ratio of MA to DMSO is 50:1~5:1 mg / mL;

[0033] Step 4. Mix the suspension in step 2 with the MA solution prepared in step 3. The mass ratio of graphene oxide to MA is 10:1~1:10, and heat and stir at 100~160°C for 1~3 days;

[0034] Step 5: After vacuum filtration, washing and drying, the functionalized graphene nano-hybrid material (MA-mGO) is obtained.

Embodiment 1

[0036] The first step, the preparation of graphite oxide solid;

[0037] Pre-oxidize 20 g of natural graphite (400 mesh) with 30 mL of concentrated sulfuric acid, 10 g of potassium persulfate and 10 g of phosphorus pentoxide at 80 °C, wash with water to pH = 7, and dry overnight at room temperature for use;

[0038] 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 i...

Embodiment 2

[0047] The first to third steps are the same as steps one to three in Example 1.

[0048] In the fourth step, at room temperature, add the suspension in the second step to the solution in the third step; adjust the temperature to 110 °C, and stir at a constant temperature for 24 h;

[0049] In the fifth step, the crude product obtained in the fourth step is suction filtered, washed and dried to obtain the product MA-mGO 110 .

[0050] Infrared spectrum such as image 3 d, proving that the nano-hybrid material has been successfully synthesized.

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Abstract

The invention discloses a hybrid nanomaterial of a melamine chemically-modified graphene oxide and a preparation method of the hybrid nanomaterial. The preparation method mainly comprises the two steps of graphite oxide preparation and functionalized graphene hybrid nanomaterial preparation. According to the invention, organic covalence and non-covalence technologies are perfectly combined, the thermal stability of the synthesized hybrid nanomaterial is greatly improved as comparison with that of the unmodified graphene oxide, and the load of melamine modified on the graphene oxide can be adjusted through the change of the reaction temperature, thus the effective control for the dispersing performance of the functionalized hybrid material in a solvent is realized. In addition, the preparation method is simple and efficient in synthesis step, simple in after-treatment and easy for realizing large-scale preparation; and due to the introduction of the melamine as a flame retardant, the nanomaterial is particularly suitable for being used as nanofiller to prepare a high-heat-resistant flame-retardant polymer nano composite. Therefore, the nanomaterial has better application prospects and economic benefits.

Description

technical field [0001] The invention relates to a graphene-based melamine functionalized nano-hybrid material and a preparation method thereof, in particular to a nano-hybrid material of melamine chemically modified graphene oxide and a preparation method thereof, belonging to the field of material preparation. Background technique [0002] Graphene, due to its excellent physical and chemical properties, has aroused a worldwide research boom and has now become one of the frontier fields of technological innovation in the world. Its discoverers such as Geim have won the Nobel Prize in Physics. However, the chemically inert surface of graphene has van der Waals forces between layers, making it easy to agglomerate, which seriously hinders its dispersion in any solvent and limits its application in polymer nanocomposites. [0003] The preparation methods of graphene mainly include SiC method, mechanical exfoliation method, organic synthesis method and so on. However, in these ...

Claims

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Application Information

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IPC IPC(8): C01B31/04B82Y30/00C01B32/198
Inventor 张树鹏宋海欧姚冬婷韩建美余荣兵罗玉婷
Owner NANJING UNIV OF SCI & TECH
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