Graphene and carbon fiber composite material, and preparation thereof

A technology of carbon fiber materials and composite materials, which is applied to graphene and carbon fiber composite materials. Based on the field of graphene and carbon fiber composite materials and preparation, it can solve problems such as easy peeling off of the coating, poor compatibility, and material damage, and achieve low cost, High compatibility and low equipment investment

Inactive Publication Date: 2009-06-24
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adding metal or inorganic coating on the surface of carbon fiber can form composite fiber material and improve some properties of carbon fiber. , bending, etc.) the coating is easy to fall off, causing damage to the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1: the preparation of monolayer graphite aqueous solution

[0032] 10 g of graphite and 7 g of sodium nitrate (analytical pure) were added to the flask, and then 500 mL of concentrated sulfuric acid (analytical pure) was added. Afterwards, in an ice-water bath, slowly add 40 g of potassium permanganate while stirring, and the addition time is controlled at 2 hours, and then kept for 2 hours to cool down to room temperature. After stirring at room temperature for 10 days, the reaction solution first turned green, then dark brown, and finally brick brown, and became viscous. The reaction solution was slowly added to 1000 mL of 5 wt % dilute sulfuric acid, the addition time was controlled at 2 h, stirring was kept, and the temperature was controlled at 98°C. The reaction solution was stirred at this temperature for another 2 h, and then cooled to 60 °C. Add 30 mL of hydrogen peroxide (30% aqueous solution), keep at 60° C. for 2 h, then cool down to room temper...

Embodiment 2

[0033] Embodiment 2: the preparation of monolayer graphite organic solution

[0034] In the 500mL round bottom flask, add 150mL through redistilled N,N-dimethylformamide, then add the functionalized monolayer graphene prepared in 100mg embodiment 1, then add 100g diphenylmethane diisocyanate (Methylenediphenyl Diisocyanate, referred to as MDI), magnetic stirring, reacted at room temperature for 5 days. The reaction product was added dropwise into 150 mL o-dichlorobenzene, stirred for 30 min, and centrifuged at 1000 rpm for 10 min (desktop centrifuge, 5810R, Germany). The supernatant was added dropwise into 200 mL of chloroform, centrifuged at 11,000 rpm for 30 min, and the precipitate at the bottom of the centrifuge tube was collected. The above operation was repeated twice to obtain MDI functionalized graphene with a final yield of 70%. The single-layer graphene functionalized by MDI was ultrasonicated for 30 min in a common organic solvent such as acetone to completely melt ...

Embodiment 3

[0035] Embodiment 3: the preparation of multilayer graphite aqueous solution

[0036] Multilayer graphene was prepared according to the method reported in the literature (Carbon, 2004, 42, 2929), and the obtained product was centrifuged to obtain a mixture of 2-5 layers of graphene. The multilayer graphene mixture was ultrasonically 40min in water to obtain an aqueous solution of multilayer graphene.

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Abstract

The invention relates to a Graphene and carbon fiber-based composite material and a preparation method thereof. The composite material is prepared by taking the Graphene and the carbon fiber as raw materials, and coating a Graphene coating layer on the surface of the carbon fiber by a coating method, and the thickness of the coating layer is 1nm-5mum. The Graphene is taken as a surface coating material of the carbon fiber, and the Graphene and the carbon fiber are carbon materials and have high compatibility, thus Graphene solution coated on the surface of the carbon fiber can form the high-performance composite material and further improve the mechanical property, conductivity and heat resistance of the carbon fiber. The composite material has low cost, simple operation and strong applicability.

Description

technical field [0001] The invention relates to a carbon composite material, in particular to a composite material based on graphene (Graphene) and carbon fiber and a preparation method, that is, a graphene coating is prepared on the surface of carbon fiber by coating to obtain a composite material of graphene and carbon fiber. Background technique [0002] Carbon fiber refers to a fiber material that has been carbonized at a high temperature and contains more than 85% carbon, including carbon fiber and graphite fiber. Carbon fiber is a fiber with a carbon content of 85 to 95% after the organic fiber is treated at 1000-2300°C; graphite fiber is a fiber with a carbon content of more than 98% after the organic fiber is treated at a temperature above 2300°C. There are many raw materials that can be used to prepare carbon fibers, including polyacrylonitrile, pitch, viscose fiber, polyvinyl chloride, polyvinyl alcohol, phenolic resin, lignin, etc. Among them, only polyacrylonitri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/83
Inventor 陈永胜黄毅
Owner NANKAI UNIV
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