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Composite material fiber based on carbon nano-tube and its preparation method

A composite material fiber, carbon nanotube technology, applied in the direction of fiber chemical characteristics, single-component synthetic polymer rayon, textiles and papermaking, etc. Peeling and other problems to achieve the effect of improving mechanical properties and increasing electrical conductivity

Inactive Publication Date: 2005-05-25
DONGHUA UNIV
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite material fiber based on carbon nanotubes and its preparation method, so as to solve the problem of poor dispersion of carbon nanotubes in the polymer matrix in the prior art, difficulty in controlling the orientation and easy removal from the matrix. Disadvantages such as stripping

Method used

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  • Composite material fiber based on carbon nano-tube and its preparation method
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  • Composite material fiber based on carbon nano-tube and its preparation method

Examples

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Effect test

Embodiment 1

[0030] ① ultrasonicating the carbon nanotubes in a mixed acid of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1 for 4 hours, and obtaining purified carbon nanotubes after cleaning, filtering and drying;

[0031] ②Put it into an aqueous solution of gum arabic containing 3% by weight, let it stand for 6 hours, dry and grind to obtain modified carbon nanotubes;

[0032] ③ the modified carbon nanotubes 0.15g and 48g acrylonitrile, 3.6g methyl acrylate, 0.67g itaconic acid, 0.15g azobisisobutyronitrile, 1.5g isopropanol, 290g 51% by weight sulfur The sodium cyanate aqueous solution is polymerized in a polymerization kettle, wherein the polymerization temperature is 78° C., and the polymerization time is 1 hour to prepare a composite material stock solution;

[0033] ④The stock solution is prepared by solution spinning to obtain a composite material fiber containing 0.2% carbon nanotubes by weight, wherein the spinning temperature is 60°C, the dia...

Embodiment 2

[0036] ① Ultrasound the carbon nanotubes in a mixed acid of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1 for 8 hours, and obtain purified carbon nanotubes after cleaning, filtering and drying;

[0037] ②Put it into an aqueous solution of sodium alkyl sulfate containing 10% by weight, let it stand for 4 hours, dry, and grind to obtain modified carbon nanotubes;

[0038] ③The modified carbon nanotubes 0.6g and 40g acrylonitrile, 3.6g methyl acrylate, 0.20g azobisisobutyronitrile, 1.5g isopropanol, and 100g dimethyl sulfoxide were polymerized in a polymerization tank, wherein The polymerization temperature is 70°C, the polymerization time is 2 hours, and the composite stock solution is prepared;

[0039] ④ The stock solution is prepared by solution spinning to obtain a composite material fiber containing 2% carbon nanotubes by weight, wherein the spinning temperature is 80 ° C, the diameter of the spinneret hole is 0.15 mm, the coagulation ba...

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Abstract

A composite fibre based on carbon nanotubes is prepared through modifying the surface of carbon nanotube, polymerizing them with polymer monomer, trigger and assistant to obtain dope, and spinning. It has 3-20 CN / dtex break strength and 10 to the power (2-8) ohm.cm resistivity.

Description

technical field [0001] The invention relates to a composite material fiber and a preparation method thereof, in particular to a carbon nanotube-based composite material fiber and a preparation method thereof. Background technique [0002] Since carbon nanotube (CNT) was discovered by Iijima of NEC in Japan in 1991 (Iijima S., Nature, 1991, 354 (7), 56-58), it has immediately aroused widespread interest of scientists. Research hotspots in science, physics and chemistry. Carbon nanotubes are hollow coaxial cylinders rolled from sheet-structured graphite, and the caps formed by half of the fullerene sphere molecules at both ends of the cylinder can be divided into single-walled carbon nanotubes according to the number of layers of graphite sheets. (SWNTs) and multi-walled carbon nanotubes (MWNTs). Due to the small radial size of carbon nanotubes, the diameter of the tube is generally several nanometers to tens of nanometers, and the length of carbon nanotubes is generally sev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/44C08F20/44C08K3/04C08K9/02D01F6/54
Inventor 王彪王华平洪炳墩张玉梅
Owner DONGHUA UNIV
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