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Graphite alkenyl supermolecule hybridization material with strengthened heat stability and preparation method thereof

A graphene-based, hybrid material technology, applied in the direction of graphene, nanotechnology for materials and surface science, nanocarbon, etc., can solve the problems of high reaction temperature, complicated operation, etc., to improve thermal stability performance, simple Operation, effect of high thermal stability

Inactive Publication Date: 2012-06-13
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The invention aims at the disadvantages of high reaction temperature and cumbersome operation in the prior art, and provides a graphene-based supramolecular hybrid material

Method used

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  • Graphite alkenyl supermolecule hybridization material with strengthened heat stability and preparation method thereof
  • Graphite alkenyl supermolecule hybridization material with strengthened heat stability and preparation method thereof
  • Graphite alkenyl supermolecule hybridization material with strengthened heat stability and preparation method thereof

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preparation example Construction

[0030] A preparation method of a graphene-based supramolecular hybrid material, the method following steps:

[0031] In the first step, a modified Hummers method (Modified Hummers method) is used to prepare graphite oxide solid;

[0032] The second step is to prepare a graphene oxide DMF suspension with a concentration of 7.5-15 mg / mL under ultrasonication for 6-10 hours;

[0033] The 3rd step, preparation concentration is the alkylamine chloroform solution of 20%;

[0034] The fourth step, adding the third step solution to the second step suspension, stirring at room temperature for 2 to 4 days;

[0035] In the fifth step, the graphene-based supramolecular hybrid material is obtained after vacuum filtration, washing and drying.

Embodiment 1

[0037] Such as figure 1 As shown, the preparation method described in this embodiment comprises the following steps:

[0038] The first step, the preparation of graphite oxide solid;

[0039] 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;

[0040] 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 yel...

Embodiment 2

[0049] Such as figure 1 As shown, the preparation method described in this embodiment comprises the following steps:

[0050] The first and second steps are the same as steps one and two in Example 1.

[0051] In the third step, 1 g of dodecylamine molecule (DDA) was dissolved in 5 mL of chloroform solvent;

[0052] In the fourth step, the solution in the third step is added to the suspension in the second step, and stirred at room temperature for 2 days.

[0053] In the fifth step, after the reaction is completed, the graphene-based supramolecular hybrid material is obtained by filtering under reduced pressure with a Buchner funnel, washing, and vacuum drying at 60 °C.

[0054] Infrared spectrum such as Figure 4 b shown; prove that the nanomaterials have been successfully synthesized.

[0055] thermally stable as Figure 5 The thermal stability of supramolecular functionalized graphene is higher than that of unmodified graphene oxide.

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Abstract

The invention discloses a graphite alkenyl supermolecule hybridization material with strengthened heat stability and a preparation method thereof. The graphite alkenyl supermolecule hybridization material with strengthened heat stability is in a nanometer structure constructed on the basis of supermolecule self-package technique. The preparation process includes three steps of graphite oxide preparation, reduced graphene oxide preparation and graphite alkenyl supermolecule hybridization material preparation. Relative to unmodified reduced graphene oxide, the hybridization material combined inthe method can be easily dispersed in organic solvent with low polarity and the heat stability is greatly improved. Simultaneously, the hybridization material can serve as a nanometer material to improve the heat stability of a polymer composite material. The combining steps are simple and high in efficiency, so that the hybridization material can be prepared in a large amount and has better application prospect and economical benefit.

Description

technical field [0001] The invention relates to a supramolecular hybrid material and a preparation method thereof, in particular to a graphene-based supramolecular hybrid material with enhanced thermal stability and a preparation method thereof. Background technique [0002] In 2004, Geim's research group successfully prepared monoatomically thick graphene by mechanical exfoliation. Due to its excellent physical and chemical properties, it soon became one of the international hot topics in the fields of physics, chemistry and materials science. Graphene-based polymer composites, as an emerging research system, can significantly improve the thermal, electrical, optical, and mechanical properties of polymers. [0003] However, the chemical stability of graphene with a complete structure is extremely high, the surface is in an inert state, the interaction with other media (such as solvents, etc.) is weak, and the strong interface can cause irreversible agglomeration, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04B82Y30/00B82Y40/00C01B32/184
Inventor 张树鹏宋海欧
Owner NANJING UNIV OF SCI & TECH
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