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Preparation method of carboxylic carbon nano-tube /nylon 66 composite material

A technology of carboxylated carbon and composite materials, which is applied in the field of materials, can solve the problems of poor dry impact strength, high water absorption, and low notched impact strength, and achieve the effects of reducing clustering, good dispersion performance, and improved dispersion

Inactive Publication Date: 2008-06-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, AABB nylon also has disadvantages such as low temperature and poor dry impact strength, high water absorption, and low notched impact strength.
There are many studies on the modification of these shortcomings. The use of nanoparticles to improve AABB nylon has been developed rapidly, but there are not many studies on the modification of AABB nylon with carbon nanotubes. The only research is also focused on the use 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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  • Preparation method of carboxylic carbon nano-tube /nylon 66 composite material
  • Preparation method of carboxylic carbon nano-tube /nylon 66 composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Step 1: Preparation of carboxylated carbon nanotubes

[0035] 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 80° 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.

[0036] The second step: preparatio...

Embodiment 2

[0039] Step 1: Preparation of carboxylated carbon nanotubes

[0040] 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 hydrochloric acid, and ultrasonically shake 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 1 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.

[0041] The second step: preparation of carboxylat...

Embodiment 3

[0044] Step 1: Preparation of carboxylated carbon nanotubes

[0045] 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 dilute 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.

[0046]The second step: preparation of ca...

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Abstract

The invention pertains to the field of material technology, in particular to a preparation method for a carboxylic carbon nanotube / nylon 66 composite material.The particular preparation procedure is as follows: preparing a carbon nanotube with carboxyl by acidulating the carbon nanotube; Preparing the carboxylic carbon nanotube / nylon 66 composite material by polymerizing the carboxylic carbon nanotube and the raw material (such as polybasic acid and polybasic amine) which is used for preparing the nylon 66 through in situ polymerization. The polycondensation of carboxy group on the carbon nanotube improves the dispersity and interfacial binding force of the carbon nanotube in nylon matrix, and carboxylic carbon nanotube / nylon composite material with excellent dispersive property is obtained.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a preparation method of a carboxylated 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 belongs to AABB type nylon. AABB type nylon has the characteristics of high mechanical strength and high rigidity. It is the main variety of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08K9/04C08K5/092
Inventor 刘琳程思王国建鲍磊
Owner TONGJI UNIV
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