Preparation method for high-performance epoxy resin composite material

A technology of epoxy resin and composite materials, which is applied in the field of materials, can solve the problems of small increase and decrease in the mechanical properties of composite materials, and achieve the effects of reducing agglomeration, improving dispersion, 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

[0026] Step 1: mix 500mg multi-walled carbon nanotubes with 150ml H 2 SO 4 with HNO 3 mixed solution (98%H 2 SO 4 : 68% HNO 3 = 3:1) mixed, and refluxed for 4 hours at 35-40° C. under the condition of ultrasonic vibration. Then filter with a metafluoride membrane with a pore size of 0.45 μm, and wash with water until the pH is neutral. The product was placed in a vacuum oven and dried under vacuum at 40°C for 24h. Then the above-mentioned one-step acidified and washed product was placed in H 2 SO 4 with H 2 o 2 mixed solution (98%H 2 SO 4 : 30%H 2 o 2 =4:1) at 70°C for 2h. Then filter with a metafluoride membrane with a pore size of 0.45 μm, and wash with water until the pH is neutral. The product was placed in a vacuum oven and dried under vacuum at 40°C for 24h.

[0027] Step 2: Take 400 mg of the above-mentioned acidified carbon nanotubes and place them in a reaction flask, add 20 ml of SOCl 2 And 1ml of N,N-dimethylformamide, stirred and refluxed at 70°C f...

Embodiment 2

[0033] The first step and the second step are with embodiment 1.

[0034] Step 3: Mix 0.2 g of carbonyl chloride nanotubes with an average diameter of less than 8 nm and a length of 50 μm with 20 ml of ethylenediamine, and heat and reflux in an oil bath at 24° C. for 24 hours. Add 5ml of triethylamine and 0.02g of 2-methylaminopyridine. After the reaction is complete, wash away excess amine with absolute ethanol, filter with a microporous membrane (0.45 μm in diameter), repeat the washing several times, and filter out the insoluble The residue was collected and the filtrate was evaporated to dryness to obtain black multi-walled carbon nanotubes modified with ethylenediamine. Vacuum dried, dried and collected for later use.

[0035] Step 4: Preheat 30g of epoxy resin; take 0.3g of ethylenediamine-modified carbon nanotubes according to 1% of the total amount, grind it into fine powder, add it to the preheated epoxy resin, and stir vigorously 8h, ultrasonic dispersion 4h, mix w...

Embodiment 3

[0039] The first step and the second step are with embodiment 1.

[0040] Step 3: Use 0.2 g of carbonyl chloride nanotubes with an average diameter of less than 8 nm and a length of 50 μm and mix them evenly with 20 ml of hexamethylenediamine, and heat and reflux in an oil bath at 24° C. for 24 hours. Add 5ml of triethylamine and 0.04g of 2-methylaminopyridine. After the reaction is complete, wash away the excess amine with absolute ethanol, filter with a microporous membrane (0.45 μm in diameter), repeat the washing several times, and filter out the insoluble The residue was collected and the filtrate was evaporated to dryness to obtain black multi-walled carbon nanotubes modified with ethylenediamine. Vacuum dried, dried and collected for later use.

[0041] Step 4: Preheat 30g of epoxy resin; take 0.3g of hexamethylenediamine-modified carbon nanotubes according to 0.9% of the total percentage, grind it into a fine powder, add it to the preheated epoxy resin, and stir vigor...

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Abstract

The invention relates to a preparation method of a high performance epoxy resin composite. First, carbon nano tubes are modified on the surface by acidification, acyl chlorination and amination to prepare carbon nano tubes with amino. The dispersion of the carbon nano tubes in the epoxy resin is improved; the high performance epoxy resin composite is obtained through proper ultrasonic oscillation and strong stirring dispersion and through the amino on the carbon nano tubes having chemical cross-linking with epoxy groups in the epoxy resin.

Description

technical field [0001] The invention belongs to the field of materials and relates to a preparation method of a high-performance epoxy resin composite material. 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 resin materials nowadays, but the cured epoxy resin usually has the disadvantages o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00C08K9/00C08K3/04C09C3/08
Inventor 王国建屈泽华郭建龙
Owner TONGJI UNIV
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