Polyolefin/graphene nanocomposite and preparation method thereof

A nanocomposite material and graphene technology are applied in the field of polyolefin/graphene nanocomposite materials and their preparation, which can solve the problems of large amount of organic solvent, difficulty in dispersing graphene, serious environmental pollution, etc., and improve compatibility. , Improve dispersion, overcome the effect of high wrinkle

Active Publication Date: 2014-10-15
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention focuses on solving the problems of poor compatibility between graphene and polyolefin, difficulty in dispersing graphene when prepared by melting method, large amount of organic solvent used in preparation by solvent method (serious environmental pollution), etc., and provides a polyolefin / graphene nanocomposite Materials and their preparation methods

Method used

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  • Polyolefin/graphene nanocomposite and preparation method thereof
  • Polyolefin/graphene nanocomposite and preparation method thereof
  • Polyolefin/graphene nanocomposite and preparation method thereof

Examples

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Effect test

Embodiment 1

[0036] (1) Functional modification of graphene: mix 1g of graphite oxide and 200ml of ethanol, ultrasonically disperse for 1h, and the ultrasonic frequency is 70Hz to obtain a uniformly dispersed suspension; under stirring conditions, add 100ml of ethanol solution containing 10g of hexamethylenediamine , and then at N 2 Reflux reaction was carried out under protection for 12 hours, and the reaction temperature was 80°C; then 12 g of hydrazine hydrate solution with a mass concentration of 50% was added for reduction reaction, and the reaction time was 6 hours; finally, cooling, suction filtration, and repeated washing of the product with deionized water and ethanol alternately , and the obtained solid product was dried in a vacuum oven at 60° C. to obtain graphene modified by surface functionalization.

[0037] (2) Preparation of polypropylene grafted modified graphene: Take 0.5g of the above-mentioned functionalized modified graphene and disperse it in 200ml of xylene, ultraso...

Embodiment 2

[0046] (1) Functional modification of graphene: mix 1g of graphite oxide and 200ml of ethanol, ultrasonically disperse for 1h, and the ultrasonic frequency is 70Hz, to obtain a uniformly dispersed suspension; under stirring conditions, add 150ml of ethanol containing 15g of p-phenylenediamine solution, followed by N 2 Reflux reaction was carried out under protection for 8 hours, and the reaction temperature was 100°C; then 7g of hydrobromic acid solution with a mass concentration of 60% was added for reduction reaction, and the reaction time was 10 hours; finally, cooling and suction filtration were carried out, and the product was alternately used with deionized water and ethanol repeatedly After washing, the obtained solid product was dried in a vacuum oven at 80°C to obtain surface functionalized modified graphene.

[0047] (2) Preparation of polypropylene grafted modified graphene: Take 0.5g of the above-mentioned functionalized modified graphene and disperse it in 200ml o...

Embodiment 3

[0052] (1) Functional modification of graphene: mix 1g of graphite oxide and 200ml of ethanol, disperse by ultrasonic for 1h, and the ultrasonic frequency is 70Hz to obtain a uniformly dispersed suspension; under stirring conditions, add 50ml of diaminodiphenylmethane ethanol solution, followed by N 2 Reflux reaction was carried out under protection for 2 hours, and the reaction temperature was 120°C; then 20 g of sodium borohydride solution with a mass concentration of 40% was added for reduction reaction, and the reaction time was 2 hours; finally, cooling and suction filtration were performed, and the product was alternately used with deionized water and ethanol repeatedly After washing, the obtained solid product was dried in a vacuum oven at 50°C to obtain surface functionalized modified graphene.

[0053] (2) Preparation of polyethylene grafted modified graphene: Take 0.5g of the above-mentioned functionalized modified graphene and disperse it in 200ml of xylene, ultraso...

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Abstract

The invention discloses a polyolefin / graphene nanocomposite. According to the invention, two-dimensional nano-material graphene is used as a reinforcing agent, and through graft modification of polyolefin, polyolefin grafted-modified graphene is formed and uniformly dispersed in a polyolefin material. A preparation method for the polyolefin / graphene nanocomposite comprises the following steps: functionalized modification of graphene; preparation of polyolefin grafted-modified graphene; and preparation of the polyolefin / graphene nanocomposite. The preparation method overcomes the problems of easy agglomeration and difficult dispersion of graphene in graphene-enhanced non-polar polymers; in the prepared polyolefin / graphene nanocomposite, graphene is uniformly distributed; and the polyolefin / graphene nanocomposite has excellent flame retardation performance and mechanical properties.

Description

technical field [0001] The invention belongs to the technical field of polymer processing and the field of nanotechnology, and in particular relates to a polyolefin / graphene nanocomposite material and a preparation method thereof. [0002] Background technique [0003] Graphene is composed of a single layer of carbon atoms using SP 2 The honeycomb crystal lattice formed by hybrid stacking is a typical two-dimensional nanomaterial with a thickness of only 0.35nm. This special structure enables graphene to exhibit excellent mechanical properties, peculiar electrical properties and good thermal properties. For example, the Young's modulus of graphene can reach 11000GPa, the fracture strength can reach 125GPa, and the thermal conductivity can reach 5000W / m·K. The theoretical specific surface area is as high as 2630m 2 / g, and has the properties of perfect quantum tunneling effect, half-integer quantum Hall effect and ultra-high conductivity, and has good application prospects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/00C08K9/04C08K3/04C09C1/46C09C3/10
CPCC08K3/04C08K9/04C08K9/08C08K2201/011C08L23/06C08L23/12C08L2201/02C09C1/46C09C3/006C09C3/08C09C3/10
Inventor 杨桂生汪丽娟
Owner HEFEI GENIUS NEW MATERIALS
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