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Dispersion and directional arraying method of carbon nanotube based magnetic material in polymer

A technology of carbon nanotubes and magnetic materials, applied in the field of preparation of polymer carbon nanotube magnetic composite materials, can solve the problem that it is difficult to obtain dispersive CNTs by physical blending method, and achieve the effect of excellent mechanical properties

Inactive Publication Date: 2006-07-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It is difficult to obtain well-dispersed CNTs by physical blending. In-situ polymerization can improve the dispersion of CNTs in the polymer matrix, but the CNTs do not achieve orderly and oriented dispersion in the polymer matrix.
The report of realizing the uniform dispersion of CNTs in polymers and making them achieve directional and ordered arrangement has not been discussed so far.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The monomer is acrylonitrile, and the volume ratio of monomer to deionized water is 1:3. At room temperature, first stir and mix the deionized water and the reaction monomer at a speed of 250 rpm, then add 1% wt of the monomer weight carbon nanotube-based magnetic material for ultrasonic dispersion for 1 hour, and add the photoinitiator benzoin methyl ester, then put the reactor into a UV light box, apply a parallel plate magnetic field with a strength of 200Oe on both sides of the reactor, adjust the voltage to 220V, and the distance of the magnetic field to 40cm, and pass into the reactor for nitrogen protection. After exhausting the oxygen inside, turn on the light source to initiate polymerization, react for 15 hours, filter out the product, rinse with deionized water several times, and further dry at 80°C for 40 hours to obtain polyacrylonitrile / carbon nanotube magnetic composite material.

[0015] According to the measurement of the national standard, the carbon n...

Embodiment 2

[0017] The monomer is acrylonitrile, and the volume ratio of monomer to deionized water is 1:2.5. At room temperature, the deionized water and the reaction monomer were first stirred and mixed at a speed of 400 rpm, and then 1% wt of the monomer weight was added to the carbon nanotube-based magnetic material for ultrasonic dispersion for 1 hour, and the photoinitiator benzoin was added. For methyl ester, apply a parallel plate magnetic field with a strength of 400Oe on both sides of the reactor, adjust the voltage to 220V, and the distance of the magnetic field to 60cm, pass nitrogen protection into the reactor, then put the reactor into a UV light box to initiate polymerization, and react for 10 hours , filter out the product, rinse it with deionized water several times, and further dry it at 50° C. for 48 hours to obtain a polyacrylonitrile / carbon nanotube magnetic composite material.

[0018] According to the measurement of the national standard, the carbon nanotube magneti...

Embodiment 3

[0020] The monomer is styrene, and the volume ratio of the monomer to deionized water is 1:8. At room temperature, the deionized water and the reaction monomer were first stirred and mixed at a speed of 150 rpm, and then a carbon nanotube-based magnetic material with a monomer weight of 15% wt was added for ultrasonic dispersion for 1 hour, and a photoinitiator, benzoin, was added. Apply a parallel plate magnetic field with a strength of 300Oe on both sides of the reactor, adjust the voltage to 220V, and the magnetic field distance to 60cm, pass argon gas into the reactor for protection, then put the reactor into a γ-ray light box to initiate polymerization, and react for 15 to 18 hours , filter out the product, rinse it with deionized water several times, and further dry it at 100° C. for 36 hours to obtain a polystyrene / carbon nanotube magnetic composite material.

[0021] According to the national standard, the carbon nanotube magnetic material is well dispersed in polystyr...

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PUM

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Abstract

The disclosed method to disperse and arrange directionally the nano carbon tube magnetic material in polymer for the first time comprises: at room temperature, mixing the deionized water and monomer with rotation speed as 150-1400r / min; adding the magnetic material to supersonic disperse for one hour; putting the reactor into UV or radiation lamp box, forcing magnetic field on two sides of reactor, leading inert gas to discharge oxygen, and adding light initiator; filtering the product to clean with deionized water and dry for 36-48h at 50-100Deg. The obtained composite material has much better properties.

Description

technical field [0001] The invention relates to a method for preparing a polymer carbon nanotube magnetic composite material, in particular to a method for dispersing and aligning a carbon nanotube-based magnetic material in a polymer. Background technique [0002] Since carbon nanotubes (CNTs) were reported by Japanese scholar Iijima in Nature 354 (1991) 56 in the early 1990s, they have immediately attracted great attention from the scientific and industrial circles, and have become a hot spot in international scientific research in recent years. Carbon nanotubes are divided into multi-walled carbon nanotubes (MWNTs) and single-walled carbon nanotubes (SWNTs), which are composed of concentric cylinders formed by curling graphite sheet structure composed of six-membered rings. Depending on diameter and helicity, carbon nanotubes can exhibit metallic or semiconducting properties. Carbon nanotubes have excellent mechanical properties, their strength is 100 times higher than t...

Claims

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Application Information

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IPC IPC(8): C08F2/44C08F2/48C08F20/14C08F12/08C08F20/44C08K3/04
Inventor 朱美芳吴兆棉张凯曹慧群
Owner DONGHUA UNIV