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Surface modification method for carbon nano tube

A carbon nanotube and surface modification technology, applied in fibrous fillers, dyed low-molecular-weight organic compound treatment, dyed organosilicon compound treatment, etc., can solve the problems of mechanical properties decline and structural defects of polyester resin

Inactive Publication Date: 2013-02-27
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that in the prior art, when the carbon nanotubes modified by the silane coupling agent are mixed with the polyester resin, a strong interfacial bonding force cannot be formed between the two, and the structure is easy to occur. defects, resulting in a decrease in the mechanical properties of the modified polyester resin, and then providing a method for surface modification of carbon nanotubes, the surface modified carbon nanotubes prepared by this method can form a relatively strong bond with the polyester resin. Strong interfacial bonding force can greatly improve the thermal and mechanical properties of the modified polyester resin

Method used

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  • Surface modification method for carbon nano tube
  • Surface modification method for carbon nano tube
  • Surface modification method for carbon nano tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Add 3g of multi-walled carbon nanotubes acidified by sulfuric acid and 2.5ml of γ-aminopropyltriethoxysilane into 70ml of deionized water, stir and mix evenly at 70°C, after the reaction is completed, pass through 0.22 Filter through a μm vinylidene fluoride membrane, wash repeatedly with deionized water, and dry at 90°C for 12 hours to obtain primary modified multi-walled carbon nanotubes;

[0046] (2) Stir and mix 3 g of the primary modified multi-walled carbon nanotubes with 270 ml of ethylene glycol and 7.5 ml of concentrated sulfuric acid, and react at 130 ° C. After the reaction is completed, filter through a 0.22 μm vinylidene fluoride membrane, and washed with deionized water to neutrality, and dried at 120° C. for 4 hours to obtain secondary modified multi-walled carbon nanotubes;

[0047] (3) Mix 3 g of the secondary modified multi-walled carbon nanotubes with 9 ml of oxalic acid, 0.6 g of antimony trioxide, and 180 ml of N,N-dimethylformamide, and under n...

Embodiment 2

[0050] (1) Add 4g of multi-walled carbon nanotubes acidified with nitric acid and 4ml of anilinomethyltriethoxysilane into 92ml of deionized water, stir and mix evenly at 80°C, after the reaction is completed, pass through a 0.22μm bias Filtrate with vinyl fluoride membrane, wash repeatedly with deionized water, and dry at 80°C for 15 hours to obtain primary modified multi-walled carbon nanotubes;

[0051] (2) Stir and mix 4g of the primary modified multi-walled carbon nanotubes with 380ml of 1,4-butanediol and 10ml of concentrated sulfuric acid, and react at 135°C. Ethylene membrane filtration, and washing with deionized water to neutrality, after drying at a vacuum of 10 Pa and a temperature of 120°C for 5 hours, the secondary modified multi-walled carbon nanotubes were obtained;

[0052] (3) Stir and mix 4 g of the secondary modified multi-walled carbon nanotubes with 16 ml of oxalic acid, 0.8 g of antimony trioxide, and 280 ml of N,N-dimethylformamide, and mix them evenly ...

Embodiment 3

[0055] (1) Add 3g of multi-walled carbon nanotubes acidified by hydrogen peroxide and 6ml of γ-aminopropyltriethoxysilane into 90ml of deionized water, stir and mix evenly at 75°C, after the reaction is completed, pass through 0.22 Filter through a μm vinylidene fluoride membrane, wash repeatedly with deionized water, and dry at 90°C for 12 hours to obtain primary modified multi-walled carbon nanotubes;

[0056] (2) Stir and mix 3 g of the primary modified multi-walled carbon nanotubes with 375 ml of glycerin and 10.5 ml of concentrated sulfuric acid, and react at 140°C. After the reaction is completed, filter through a 0.22 μm vinylidene fluoride membrane, and washed with deionized water to neutrality, and dried for 5.5 hours at a vacuum degree of 10 Pa and a temperature of 115° C. to obtain secondary modified multi-walled carbon nanotubes;

[0057] (3) Stir and mix 3 g of the secondary modified multi-walled carbon nanotubes with 15 ml of terephthalic acid, 0.9 g of concentra...

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Abstract

The invention provides a surface modification method for a carbon nano tube and belongs to the field of nanotechnology. The method includes step one, uniformly mixing a carbon nano tube which is subjected to acidification by a strong oxidizing acid with a silane coupling agent and deionized water, reacting under a certain condition, filtering, washing, and drying to obtain a primary modified carbon nano tube; step two, uniformly mixing the primary modified carbon nano tube with polyhydric alcohols and a concentrated sulfuric acid, reacting under a certain condition, filtering, washing to neutral, and drying to obtain a secondary modified carbon nano tube; uniformly mixing the secondary modified carbon nano tube with an organic carboxylic acid, an esterification reaction catalyst and N,N-dimethylformamide, reacting under a certain condition by the aid of the protection of inert gases, cooling to the room temperature, filtering, washing, and drying to obtain the surface modification carbon nano tube. When the prepared modified carbon nano tube which is provided with ester groups on the surface is mixed with a polyester resin, the interface-free mixing is achieved, and the heat stability and the mechanical property of the modified polyester resin can be improved.

Description

technical field [0001] The invention relates to an inorganic nanometer material, in particular to a method for modifying the surface of a carbon nanometer tube, and belongs to the field of nanotechnology. Background technique [0002] Carbon nanotubes are hollow tubular fiber structures with a diameter of several nanometers to tens of nanometers and a length of several micrometers or even millimeters. The unique structure of carbon nanotubes determines that it not only has the inherent nature of carbon materials, but also has the electrical and thermal conductivity of metal materials, the heat resistance and corrosion resistance of ceramic materials, the weavability of textile fibers and the lightness of polymer materials. Quality and ease of processing. Due to the above-mentioned excellent properties of carbon nanotubes, they can be used in the manufacture of supercapacitors in the fields of automobiles, machinery, electronics, military and other fields, and can be combine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/44C09C3/12C09C3/08C08K9/06C08K9/04C08K9/02C08K7/00C08K3/04C08L67/02
Inventor 牛梅戴晋明侯文生王淑花范海滨
Owner TAIYUAN UNIV OF TECH
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