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Method for producing high decentrality amido carbon nano-tube/nylon 66 composite material

A carbon-aminated, high-dispersibility technology, applied in the field of materials, can solve problems such as poor impact strength, high water absorption, and low notch impact strength, and achieve the effects of improving dispersion performance, reducing clusters, and improving dispersibility

Inactive Publication Date: 2010-12-22
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nylon 66 also has disadvantages such as low temperature and poor dry impact strength, high water absorption, and low notched impact strength.
There are many researches on the modification of these shortcomings. The use of nanoparticles to improve nylon 66 has been developed rapidly, but there are very few studies on the modification of nylon 66 with carbon nanotubes. The only few studies also focus on the method of mechanical blending. The dispersion of carbon nanotubes in the matrix is ​​not good, and the performance improvement is limited

Method used

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  • Method for producing high decentrality amido carbon nano-tube/nylon 66 composite material
  • Method for producing high decentrality amido carbon nano-tube/nylon 66 composite material
  • Method for producing high decentrality amido carbon nano-tube/nylon 66 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Step 1: Preparation of carboxylated carbon nanotubes

[0025] Mix 1 g of carbon nanotubes with a diameter of 1-50 nm and a length of 0.1-50 μm, 120 ml of concentrated sulfuric acid and 40 ml of concentrated nitric acid, and vibrate ultrasonically at 40° C. for 8 hours. After the reaction is completed, use a large amount of deionized water to remove mixed acid and other by-products, filter with a microporous membrane (0.45 μm in diameter) until the filtrate is neutral, and dry to obtain acidified carbon nanotubes. Mix 1 g of acidified carbon nanotubes with 40 ml of concentrated sulfuric acid and 10 ml of hydrogen peroxide, and vibrate ultrasonically at 70° C. for 0.5 h. After the reaction is completed, use a large amount of deionized water to remove mixed acid and other by-products, filter with a microporous membrane (0.45 μm in diameter) until the filtrate is neutral, and dry to obtain carboxylated carbon nanotubes.

[0026] The second step: preparation of aminated car...

Embodiment 2

[0031] Step 1: Preparation of carboxylated carbon nanotubes

[0032] 1 g of carbon nanotubes with a diameter of 1-50 nm and a length of 0.1-50 μm, 120 ml of concentrated sulfuric acid and 40 ml of concentrated nitric acid were mixed evenly, and ultrasonically oscillated at 50° C. for 4 hours. After the reaction is completed, use a large amount of deionized water to remove mixed acid and other by-products, filter with a microporous membrane (0.45 μm in diameter) until the filtrate is neutral, and dry to obtain acidified carbon nanotubes. Mix 1 g of acidified carbon nanotubes with 40 ml of concentrated sulfuric acid and 10 ml of hydrogen peroxide, and vibrate ultrasonically at 60° C. for 0.5 h. After the reaction is completed, use a large amount of deionized water to remove mixed acid and other by-products, filter with a microporous membrane (0.45 μm in diameter) until the filtrate is neutral, and dry to obtain carboxylated carbon nanotubes.

[0033] The second step: preparatio...

Embodiment 3

[0038] Step 1: Preparation of carboxylated carbon nanotubes

[0039] 1 g of carbon nanotubes with a diameter of 1-50 nm and a length of 0.1-50 μm, 120 ml of concentrated sulfuric acid and 40 ml of concentrated nitric acid were mixed evenly, and ultrasonically oscillated at 50° C. for 4 hours. After the reaction is completed, use a large amount of deionized water to remove mixed acid and other by-products, filter with a microporous membrane (0.45 μm in diameter) until the filtrate is neutral, and dry to obtain acidified carbon nanotubes. Mix 1 g of acidified carbon nanotubes with 40 ml of concentrated sulfuric acid and 10 ml of hydrogen peroxide, and vibrate ultrasonically at 70° C. for 0.5 h. After the reaction is completed, use a large amount of deionized water to remove mixed acid and other by-products, filter with a microporous membrane (0.45 μm in diameter) until the filtrate is neutral, and dry to obtain carboxylated carbon nanotubes.

[0040] The second step: preparatio...

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Abstract

The invention relates to preparation method of aminated carbon nanotube with high dispersibility / nylon 66 composite material, which belongs to the material technology field. The preparation method comprises the following steps that firstly, acidification is performed to the carbon nanotube to produce carbon nanotube carried with a carboxyl group, and a series of surface modification is further performed to the carboxylated carbon nanotube, to prepare the amido carbon nanotube carried with the amine groups. The aminated carbon nanotube is polymerized with hexanediamine and adipic acid through the in-situ polymerization method, to ensure the amine groups on the carbon nanotube to take part in the polycondensation reaction, so as to obtain the required products. The invention improves the dispersilbility and the interface bonding force of the carbon nanotube in the nylon 66, and obtains the aminated carbon nanotube with good dispersion property / nylon 66 composite material.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a highly dispersed aminated carbon nanotube / nylon 66 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 ideal quasi-materials for composite materials. One-dimensional lightweight reinforced functional materials. If carbon nanotubes can be uniformly added to some matrix to form a composite material, its performance can be greatly improved, and it is an ideal lightweight reinforcing fiber for composite materials. [0003] Nylon 66 is one of the varieties with the earliest development, the largest output and the widest application in the series of nylon pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/06C08K9/00C08K3/04C08K5/17
Inventor 王国建鲍磊刘琳程思
Owner TONGJI UNIV
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