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Preparation method and application of alkylated functional graphene

A functional graphene, alkylation technology, applied in the treatment of dyed low molecular organic compounds, fibrous fillers, etc., can solve the problem that the excellent properties of graphene cannot be maximized, have not been well solved, and the dispersion of graphene is poor. and other problems, to achieve the effects of excellent comprehensive performance, improved machinability, and improved interface bonding.

Inactive Publication Date: 2013-05-01
TONGJI UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] With the continuous deepening of research on graphene / polymer composite materials, its application range and performance improvement will be further developed, but the dispersion of graphene in the resin matrix is ​​poor, and the interface between the polymer and the polymer is weak. It has not been well resolved, which affects the various excellent properties of graphene itself and cannot be maximized.

Method used

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  • Preparation method and application of alkylated functional graphene
  • Preparation method and application of alkylated functional graphene
  • Preparation method and application of alkylated functional graphene

Examples

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Embodiment 1

[0029] Example 1: Disperse 0.5 g of monolayer graphene oxide prepared by the Hummers method in 50 mL of acetone-distilled water (the volume ratio of acetone to water is 10:1), ultrasonicate for 3 hours to obtain a functional graphene dispersion, and then The dispersion liquid is placed in ethanol-water solution, washed repeatedly and centrifuged at a speed of 10000 rpm, and finally the precipitate is freeze-dried to prepare the alkylated functional graphene. Prepare an aqueous solution of 50% nylon 66 salt, add alkylated functional graphene to it at a weight ratio of 10:1, ultrasonically 1h, and obtain 10% functional graphene / PA66 masterbatch by in-situ polymerization, then, the above prepared The functional graphene / PA66 masterbatch and PA66 resin are mixed uniformly through a high-speed pulverizer at a mass ratio of 1:5, and then melted, blended and extruded to obtain a PA66-based nanocomposite material with a weight content of 2% functional graphene.

Embodiment 2

[0030]Example 2: Disperse 0.8 g of single-layer graphene oxide prepared by the Hummers method in 100 mL of 2-pentanone-distilled water (the volume ratio of 2-pentanone to water is 5:1), and sonicate for 1 hour to obtain functional graphene The dispersion liquid is then placed in an ethanol-water solution, washed repeatedly and centrifuged at a speed of 10,000 rpm, and finally the precipitate is freeze-dried to prepare the alkylated functional graphene. Prepare an aqueous solution of 50% nylon 66 salt, add alkylated functional graphene into it at a weight ratio of 10:1, ultrasonically 1h, and obtain 10% functional graphene / PA66 masterbatch by in-situ polymerization, then, the above prepared The functional graphene / PA66 masterbatch and PA66 resin are mixed uniformly through a high-speed pulverizer at a mass ratio of 1:10, and then melted, blended and extruded to obtain a PA66-based nanocomposite material with a weight content of 1% functional graphene.

Embodiment 3

[0031] Example 3: Disperse 0.5 g of single-layer graphene oxide prepared by the Hummers method in 100 mL of 2-heptanone, and ultrasonicate for 5 hours to obtain a functional graphene dispersion, and then place the dispersion in ethanol-water solution, repeating it several times Wash and centrifuge at a speed of 10,000 rpm, and finally freeze-dry the precipitate to prepare alkylated functional graphene. Prepare an aqueous solution of 50% nylon 66 salt, add alkylated functional graphene to it at a weight ratio of 20:1, ultrasonically 1h, and obtain 5% functional graphene / PA66 masterbatch by in-situ polymerization, and then prepare the above-mentioned The functional graphene / PA66 masterbatch and PA66 resin are mixed uniformly through a high-speed pulverizer at a mass ratio of 1:5, and then melted, blended and extruded to obtain a PA66-based nanocomposite material with a weight content of 1% functional graphene.

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Abstract

The invention relates to a preparation method and an application of alkylated functional graphene. The preparation method comprises the steps of dispersing graphene oxide prepared by an improved Hummers method into a micromolecular ketone compound and water mixed solution (0.1-5mg / mL) in different proportions according to a stoichiometric ratio, conducting ultrasonic oscillation and stripping for 1-8h at a room temperature, separating, and obtaining the functional graphene. The functional graphene and PA66 (Poly A 66) as raw materials, a graphene / PA66 nano composite is obtained by a fusion blending method, and the weight percentage of the functional graphene in the composite is 0.01-1%. The preparation method of the modified graphene is simple, convenient and quick, and the dispersity of the graphene in a polymeric matrix can be improved significantly. The invention further discloses a preparation method of the graphene / PA666 nano composite. The mechanical property, antistatic property, moisture absorption and thermal stability of the prepared nano composite can be improved obviously.

Description

technical field [0001] The invention relates to a method for preparing alkylated functional graphene and its application, and belongs to the field of new nanometer materials and applications. Background technique [0002] With the rapid development of science and technology, traditional single materials are increasingly unable to meet the needs of the industrial field. The needs of society have put forward more stringent standards for materials. Therefore, this also requires researchers to develop products with better performance. or new materials. The use of nylon 66 (PA66) as an engineering plastic began in 1956 [Deng Rusheng, Wei Yuanfang, Chen Buning. Polyamide resin and its application, Beijing, Chemical and Chemical Press, 2002:1], it is widely used in automobiles due to its many advantages , transportation, and electrical and electronic fields, but there are disadvantages such as high water absorption, poor acid resistance, poor weather resistance, and deformation af...

Claims

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Application Information

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IPC IPC(8): C09C1/44C09C3/08C08K9/04C08K3/04C08L77/06C08J3/22C08G69/28
Inventor 王国建戴进峰吴承恳
Owner TONGJI UNIV
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