Carbon-nanotube-containing polymer nanocomposite and preparation method thereof

A nanocomposite material and carbon nanotube technology, which is applied in the field of polymer technology and nanocomposite materials, can solve the problems of destroying the conjugated structure, the performance of composite materials, and the dispersibility of carbon nanotubes, etc., and achieves high efficiency and few steps. , the effect of excellent physical properties

Active Publication Date: 2011-09-14
江苏清材智能制造有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has obvious disadvantages: first, the strong acid treatment destroys the conjugated structure of the carbon nanotubes, thus damaging the mechanical and electrical properties of the carbon nanotubes themselves, resulting in a decline in the performance of the final composite material. Tube is particularly obvious
However, this method itself is difficult to ensure the dispersion of carbon nanotubes, and the control of reaction conditions is complicated
[0005] U.S. Patent US2009 / 0123731 discloses a method of using ultra-high shear melt dispersion to achieve uniform dispersion of unmodified carbon nanotubes, but high shear during processing leads to fracture of carbon nanotubes and polymer matrix problems such as degradation

Method used

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  • Carbon-nanotube-containing polymer nanocomposite and preparation method thereof
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  • Carbon-nanotube-containing polymer nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Weigh 1 g of multi-walled carbon nanotubes (Showa Denko VGCF), 1 g of 1-butyl-3-methylimidazolium hexafluorophosphate, mix them directly and manually grind them with an agate mortar for 5 min to obtain a black gel. Using Raman spectrum analysis, compared with pure carbon nanotubes, the peak position of coated carbon nanotubes is obviously red-shifted, indicating that the interaction between carbon nanotubes becomes smaller and the entanglement becomes less.

[0047] Add 2 grams of carbon nanotubes treated with the above-mentioned ionic liquid and 50 grams of polymethyl methacrylate into the internal mixer. The temperature of the internal mixer is 180° C., the screw speed is set at 100 rpm, and the material is discharged after internal mixing for 5 minutes.

[0048] The above-mentioned kneaded sample was hot-pressed into a sheet with a thickness of 1 mm in a hot press at 180° C., which was recorded as PMMA / IL-MWNTs (IL:MWNTs=1:1), and various tests were performed. The surf...

Embodiment 2

[0055] Weigh 1 g of multi-walled carbon nanotubes (Showa Denko VGCF), 2 g of 1-butyl-3-methylimidazolium hexafluorophosphate, mix them directly and manually grind them with an agate mortar for 5 min to obtain a black gel. Using Raman spectrum analysis, compared with pure carbon nanotubes, the peak position of coated carbon nanotubes is obviously red-shifted, indicating that the interaction between carbon nanotubes becomes smaller and the entanglement becomes less.

[0056] Add 3 grams of carbon nanotubes treated with the above ionic liquid and 50 grams of polymethyl methacrylate into the internal mixer. The temperature of the internal mixer is 180° C., the screw speed is set at 100 rpm, and the material is discharged after internal mixing for 5 minutes.

[0057] The above-mentioned kneaded sample was hot-pressed into a sheet with a thickness of 1 mm in a hot press at 180° C., which was recorded as PMMA / IL-MWNTs (IL:MWNTs=2:1), and various tests were performed. The surface of t...

Embodiment 3

[0063] Weigh 1 g of multi-walled carbon nanotubes (Showa Denko VGCF), 5 g of 1-butyl-3-methylimidazolium tetrafluorophosphate, mix them directly and manually grind them with an agate mortar for 5 min to obtain a black gel. Using Raman spectrum analysis, compared with pure carbon nanotubes, the peak position of coated carbon nanotubes is obviously red-shifted, indicating that the interaction between carbon nanotubes becomes smaller and the entanglement becomes less.

[0064] 6 grams of carbon nanotubes and 50 grams of polymethyl methacrylate treated with the above-mentioned ionic liquid were added into the internal mixer, the temperature of the internal mixer was 180° C., the screw speed was set at 100 rpm, and the material was discharged after internal mixing for 5 minutes.

[0065] The above-mentioned kneaded sample was hot-pressed into a sheet with a thickness of 1 mm in a hot press at 180° C., which was recorded as PMMA / IL-MWNTs (IL:MWNTs=5:1), and various tests were perform...

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Abstract

The invention discloses a carbon-nanotube-containing polymer nanocomposite, which comprises the following components in parts by mass: 1 part of carbon nanotube, 0.5-10 parts of ionic liquid and 5-2,000 parts of polymer. The invention further discloses a preparation method of the nanomaterial. The invention has the advantages that: (1) the carbon nanotube is coated with the ionic liquid, so that the conjugated structure of the carbon nanotube is not broken and superior physical property of the carbon nanotube per se is kept; (2) strong mechanical action is not used, so that fracture of the carbon nanotube is not caused and the length-diameter ratio of the carbon nanotube is lowered; and (3) the method for preparing the carbon-nanotube-containing nanocomposite has a small number of steps and high efficiency, is implemented without any other chemical reagents, and is simple, practicable and environment-friendly.

Description

1. Technical field [0001] The invention relates to the fields of polymer technology and nanocomposite materials, in particular to a polymer nanocomposite material containing carbon nanotubes and a preparation method thereof. 2. Background technology [0002] Carbon nanotubes are considered as ideal nanofillers for polymer materials due to their excellent mechanical, electrical, thermal and other properties as well as their structural peculiarities (nanometer diameter, huge aspect ratio, etc.), The purpose of enhancing, improving the conductivity, electromagnetic shielding and photoelectron emission performance of materials. The prerequisites for achieving these target properties are the uniform dispersion of carbon nanotubes in the polymer matrix and good interfacial adhesion. However, the strong interaction between carbon nanotubes, the intertwining between carbon nanotubes and the incompatibility between carbon nanotubes and polymers make it difficult for carbon nanotubes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/12C08L33/10C08L33/14C08K9/10C08K7/00C08K3/04
Inventor 李勇进
Owner 江苏清材智能制造有限公司
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