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Graphene-based barrier composite material and preparation method thereof

A technology of graphene-based and composite materials, applied in the field of graphene-based nano-barrier composite materials and its preparation, and graphene-based nano-barrier composite materials, which can solve high investment costs, difficult process control, complex molding machinery and mold design, etc. problems, to achieve the effect of superior comprehensive performance, improved Young's modulus, strength and toughness

Inactive Publication Date: 2010-08-25
HUBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has the disadvantages of complex molding machinery and mold design, high investment costs, and difficult process control.

Method used

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  • Graphene-based barrier composite material and preparation method thereof
  • Graphene-based barrier composite material and preparation method thereof
  • Graphene-based barrier composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1 The first step, functional modification of graphene: first disperse 0.4 g of graphene oxide in 100 ml of deionized water, and ultrasonically make it completely dispersed for 30 minutes at a frequency of 100 Hz. Then, under magnetic stirring, add 10 ml of vinyl triethoxysilane, and react for 1 hour at a stirring speed of 500 revolutions per minute and a reaction temperature of 90°C. Then add 10 ml of hydrazine hydrate and react for 2 hours. Finally, it is filtered by suction, and the product is repeatedly washed with deionized water and dried in an oven at 60°C for 12 hours.

[0030] The second step, the preparation of graphene-based nano-barrier composite material: first add 30 grams of polypropylene (molecular weight 100,000) to 100 ml of carbon tetrachloride, mechanically stir at 90 ℃ for 1 hour to make it completely dissolved, stirring The speed is 1000 revolutions per minute. Then add 0.2 g of functionally modified graphene and 10 mg of benzoyl peroxide and...

Embodiment 2

[0031] Example 2 followed the preparation method of Example 1, except that the carbon tetrachloride was changed to ethanol (100 ml) and the results shown in Figures 2, 3, 4, and 5 were also obtained.

Embodiment 3

[0032] Example 3 follows the preparation method of Example 1, except that the carbon tetrachloride is changed to N,N-dimethylformamide (100 ml) and the results shown in Figures 2, 3, 4, and 5 are also obtained. .

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Abstract

The invention discloses a graphene-based barrier composite material, which has high barrier and mechanical performance and is prepared by using grapheme sheets which are two-dimension nano materials as an intensifier and uniformly dispersing the grapheme sheets in a polyolefin polymer by chemical crosslinking. The preparation method of the barrier composite material comprises: 1, functionally modifying the surface of the graphene oxide by using coupling agent to graft active functional groups on the surface of the graphene oxide, and reducing the modified graphene oxide into grapheme; and 2, uniformly dispersing the modified graphene into solution of the polyolefin to perform crosslinking under the action of an initiator to obtain the nano composite material. In the invention, the raw material is low in cost and readily available; the operation is easy, the process is simple, the repeatability is high, the graphene can well disperse in the polyolefin, and the prepared graphene-based barrier composite material has high polar and nonpolar solvent barrier performance and is obviously improved in tensile strength and fracture toughness.

Description

Technical areas: [0001] The invention relates to a graphene-based nano-barrier composite material, and in particular to a graphene-based nano-barrier composite material and a preparation method thereof. The invention belongs to the field of polymer processing technology and the field of nanotechnology. Background technique: [0002] Since the discovery of graphene by Professor Geim and others from the University of Manchester in the UK in 2004 (Geim, A.K. et al. Science, 306, 666 (2004)), graphene has aroused great interest from researchers around the world. Graphene is composed of a dense layer of carbon atoms wrapped in a honeycomb crystal lattice. It is a typical two-dimensional nanomaterial with a thickness of only 0.35nm. This special structure contains rich and novel physical phenomena, allowing graphene to exhibit many excellent properties (Geim, A.K. et al. Nature Materials, 6, 183 (2007)). For example, the strength of graphene is the highest among tested materials...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/12C08L47/00C08L23/20C08L27/06C08L27/14C08L27/18C08L25/06C08K9/06C08K9/04C08K3/04
Inventor 王贤保王敬超徐春晖万丽
Owner HUBEI UNIV
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