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Preparation method for carbon nano-tube/epoxy resin high-performance composite material

A technology of epoxy resin and carbon nanotubes, applied in the field of materials, can solve the problems of reduction and the improvement of the mechanical properties of composite materials is not large, and achieve the effects of improving dispersibility, reducing agglomeration and improving mechanical properties.

Inactive Publication Date: 2008-01-16
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, AllaouiJ, Schadler, Breton, etc. prepared carbon nanotube / epoxy resin composite materials by blending method, and found that adding carbon nanotubes can improve the mechanical properties of the matrix, but the dispersion problem of carbon nanotubes has not been well resolved. As a result, the mechanical properties of composite materials have not been greatly improved, or even decreased.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Preparation of Aminated Carbon Nanotubes

[0028] Mix 0.2 g of purified carbon nanotubes with an average diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 30 g of ethylenediamine, and 5 g of N, N'-dicyclohexylcarbodiimide, and place them in an oil bath at 120 ° C. Heated to reflux for 36h. After the reaction is completed, wash off excess amine, N, N'-dicyclohexylcarbodiimide and other by-products under ultrasonic vibration with absolute ethanol, filter with a microporous membrane (0.45 μm in diameter), and repeat Wash 3 times. The filtered carbon tubes were dissolved in dichloromethane, the insoluble residue was filtered out, and the filtrate was collected and evaporated to dryness to obtain aminated multi-walled carbon nanotubes modified with ethylenediamine.

[0029] Step 2: Preparation of Aminated Carbon Nanotubes / Epoxy Resin Composite

[0030] Take 30g of epoxy resin and preheat at 60°C; weigh 0.3g of aminated multi-walled carbon nanotubes modified wit...

Embodiment 2

[0032] Step 1: Preparation of Aminated Carbon Nanotubes

[0033] Mix 0.2 g of purified carbon nanotubes with an average diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 30 g of hexamethylenediamine, and 5 g of N, N'-dicyclohexylcarbodiimide, and place them in an oil bath at 120 ° C. Heated to reflux for 36h. After the reaction was completed, excess amine, N, N'-dicyclohexylcarbodiimide and other by-products were ultrasonically washed with absolute ethanol, filtered with a microporous membrane (0.45 μm in diameter), and washed three times. The filtered carbon tubes were dissolved in dichloromethane, the insoluble residue was filtered out, and the filtrate was collected and evaporated to dryness to obtain aminated multi-walled carbon nanotubes modified with hexamethylenediamine.

[0034] Step 2: Preparation of Aminated Carbon Nanotubes / Epoxy Resin Composite

[0035] Take 30g of epoxy resin and preheat at 60°C; weigh 0.3g of aminated multi-walled carbon nanotubes modified w...

Embodiment 3

[0037] Step 1: Preparation of Aminated Carbon Nanotubes

[0038] Mix 0.2 g of purified carbon nanotubes with an average diameter of 1 to 50 nm and a length of 0.1 to 50 μm, 30 g of triethylenetetramine, and 5 g of N, N'-dicyclohexylcarbodiimide, and place them in an oil bath at 120 ° C. Heated to reflux for 36h. After the reaction is completed, use absolute ethanol to ultrasonically wash off excess amines, N, N'-dicyclohexylcarbodiimide and other by-products, filter with a microporous membrane (0.22 μm in diameter), and repeat the cleaning several times . The filtered carbon tubes were dissolved in dichloromethane, the insoluble residue was filtered out, and the filtrate was collected and evaporated to dryness to obtain triethylenetetramine-modified aminated multi-walled carbon nanotubes.

[0039] Step 2: Preparation of Aminated Carbon Nanotubes / Epoxy Resin Composite

[0040] Take 30g of epoxy resin and preheat at 60°C; weigh 0.3g of aminated multi-walled carbon nanotubes m...

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Abstract

The invention relates to a preparation method of an amino carbon nano tubes / epoxy resin high performance composite. The carbon nano tubes with amino are prepared through surface chemical modification to the carbon nano tubes by polyamine compound. The dispersion of the carbon nano tubes in the epoxy resin is improved; the connect force between the carbon nano tubes and the epoxy resin is enhanced, so that the high performance epoxy resin composite is obtained through proper ultrasonic oscillation and strong stirring dispersion and through the amino on the amino carbon nano tubes having cross-linking reaction with epoxy groups in the epoxy resin.

Description

technical field [0001] The invention belongs to the field of materials and relates to a method for improving the performance of epoxy resin with carbon nanotubes. Background technique [0002] Carbon nanotubes have very excellent mechanical properties. The strength of carbon nanotubes is 2 to 3 orders of magnitude higher than that of common polymer reinforcement materials such as ordinary carbon fibers or glass fibers, and the toughness is very high. Therefore, carbon nanotubes are completely ideal for composite materials. quasi-one-dimensional lightweight enhanced functional materials. If carbon nanotubes can be uniformly added to some matrix (epoxy resin, plastic and metal materials) to form a composite material, its performance can be greatly improved, and it is an ideal lightweight reinforcing fiber for composite materials. [0003] Epoxy resin material is one of the three most widely used thermosetting resin materials nowadays, but the cured epoxy resin usually has the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/04C08K3/04
Inventor 王国建郭建龙屈泽华
Owner TONGJI UNIV
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