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Preparation method of nylon-6 grafting modified carbon nano tubes

A carbon nanotube and graft modification technology is applied in the field of preparation of nylon 6 graft modified carbon nanotubes, which can solve the problems of dangerous and toxic use of reagents and damage to the structure of carbon nanotubes, and achieve the effect of improving dispersibility.

Inactive Publication Date: 2010-06-23
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the current methods of modifying carbon nanotubes have problems such as the structure of carbon nanotubes is destroyed, the modified carbon nanotubes are only uniformly dispersed in limited types of solvents, and the use of reagents is dangerous and toxic.

Method used

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  • Preparation method of nylon-6 grafting modified carbon nano tubes
  • Preparation method of nylon-6 grafting modified carbon nano tubes
  • Preparation method of nylon-6 grafting modified carbon nano tubes

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Effect test

Embodiment 1

[0031] Such as figure 1 Shown, a kind of preparation method of nylon 6 grafted modified carbon nanotubes, the method comprises the following steps:

[0032] (1) Preparation of styrene maleic anhydride grafted multi-walled carbon nanotubes (MWNTs-g-SMA):

[0033] Mix MWNTs, styrene, maleic anhydride, and toluene in a weight ratio of 0.1:12.5:10:200, and then ultrasonically disperse them for 0.5 hours, then put them into a reaction bottle, and then add 0.5 times the weight of MWNTs as a free radical initiator azo After mixing diisopropyl cyanide evenly, react at a constant temperature of 50°C for 1 hour under the condition of stirring. After the reaction, the toluene is removed by suction filtration, and the obtained crude product is dispersed in acetone, washed with acetone, and suction filtered. After five times, the The obtained filter cake was vacuum dried at 60°C for 24 hours to obtain MWNTs-g-SMA;

[0034] (2) Preparation of nylon 6 grafted modified carbon nanotubes (MWN...

Embodiment 2

[0037] see figure 1 Shown, a kind of preparation method of nylon 6 grafted modified carbon nanotubes, the method comprises the following steps:

[0038] (1) Preparation of MWNTs-g-SMA:

[0039] Mix MWNTs, styrene, maleic anhydride, and toluene in a weight ratio of 0.3:12.5:10:200, and carry out ultrasonic dispersion for 0.8 hours, then put them into a reaction bottle, and then add 0.7 times the weight of MWNTs. Benzoyl, after mixing evenly, reacted at a constant temperature of 65°C for 2.5 hours under the condition of stirring. After the reaction, the toluene was removed by suction filtration. The filter cake was vacuum dried at 66°C for 24 hours to obtain MWNTs-g-SMA;

[0040] (2) Preparation of MWNTs-g-PA6:

[0041]Under the protection of nitrogen, the prepared MWNTs-g-SMA is added to the caprolactam monomer that has been strictly dehydrated, and the amount of caprolactam added is 150 times the weight of MWNTs-g-SMA, and then 20% of the weight of the caprolactam monomer i...

Embodiment 3

[0043] see figure 1 Shown, a kind of preparation method of nylon 6 grafted modified carbon nanotubes, the method comprises the following steps:

[0044] (1) Preparation of MWNTs-g-SMA:

[0045] Mix MWNTs, styrene, maleic anhydride, and toluene in a weight ratio of 0.5:12.5:10:200, and then ultrasonically disperse them for 1 hour, then put them into a reaction bottle, and then add 0.95 times the weight of MWNTs as a free radical initiator azo Diisobutylcyanide, after mixing evenly, reacted at a constant temperature of 72°C for 4 hours under stirring conditions. After the reaction was completed, the toluene was removed by suction filtration, and the obtained crude product was dispersed in acetone, washed with acetone, and suction filtered. After repeated five times, the The obtained filter cake was vacuum dried at 70°C for 24 hours to obtain MWNTs-g-SMA;

[0046] (2) Preparation of MWNTs-g-PA6:

[0047] Under the protection of nitrogen, the prepared MWNTs-g-SMA is added to th...

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Abstract

The invention relates to a preparation method of nylon-6 grafting modified carbon nano tubes, which comprises the following steps: adding multi-wall carbon nano tubes, styrene and maleic anhydride into phenylmethane to carry out a free radical polymerization, then obtaining styrene maleic anhydride grafting multi-wall carbon nano tubes; and adding the styrene maleic anhydride grafting multi-wall carbon nano tubes into caprolactam monomer as a macromolecule cocatalyst for anion ring-opening polymerization, then obtaining the nylon-6 grafting modified carbon nano tubes. Compared with the prior method, the invention grafts PA6 molecular chains on the surface of the multi-wall carbon nano tubes, so that the multi-wall carbon nano tubes can be uniformly dispersed in various solvents, and meanwhile, the PA6 molecular chains can be used as a good macromolecule compatilizer to improve the dispersibility of MWNTs in various polyamides. The invention prevents the structure of the carbon nano tubes from being destroyed since the carbon nano tubes are oxidized by strong acid, and avoids using lots of virulent phenylmethane 2,4-diisocyanate. Thus, the method is convenient and safe.

Description

technical field [0001] The invention relates to carbon nanotubes, in particular to a preparation method of nylon 6 grafted modified carbon nanotubes. Background technique [0002] Carbon nanotubes (CNTs for short) have excellent mechanical and electrical properties, and have attracted great attention since their discovery. Dispersing CNTs in polymer materials to improve the mechanical and electrical properties of polymer materials is a hot spot in the field of nanocomposite research in recent years. However, there is a strong van der Waals interaction between carbon nanotubes, and there is also a strong π-π interaction between the benzene ring structural units of carbon nanotubes and their high aspect ratio, making carbon nanotubes in many solvents and polymers The agglomeration in the matrix is ​​serious, and it is difficult to achieve nanoscale dispersion. To solve these problems, surface modification of carbon nanotubes is necessary. [0003] The methods for surface mo...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 闫东广杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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