Para-position nanometer aramid fiber and carbon nano-tube composite paper preparation method

A carbon nanotube composite and aramid fiber technology, which is applied in the direction of synthetic cellulose/non-cellulose material pulp/paper, carbon compounds, and non-fiber pulp addition, can solve the problem of low far-infrared emissivity, restricted applications, and incomplete Take advantage of material properties and other issues

Pending Publication Date: 2020-02-28
乐烯恒业(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are only a small number of devices capable of emitting far-infrared rays, but due to the limitations of the nature of the materials used to emit far-infrared rays, there are more clutter in the far-infrared rays emitted by these devices, and the far-infrared ray emissivity is low
[0005] At present, the application of carbon nanotubes to emit far-infrared rays is usually to coat carbon nanotubes on a finished film (such as a plastic film). There will be a large energy loss at the recombination between them, and the characteristics of the material itself cannot be fully exerted
This defect and the far-infrared emissivity of the composite material obtained by this method are low, which seriously restricts its further application.

Method used

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preparation example Construction

[0034] The invention provides a preparation method of para-position nano-aramid fiber and carbon nanotube composite paper, comprising the following steps:

[0035] (1) obtaining para-position nano-aramid fiber aqueous dispersion, the content of para-position nano-aramid fiber in the para-position nano-aramid fiber aqueous dispersion is 0.05-0.6wt%;

[0036] (2) Obtain the carbon nanotube aqueous dispersion, add carbon nanotubes and the dispersant that can make the agglomeration between carbon nanotubes open in water, the content of carbon nanotubes in the described carbon nanotube aqueous dispersion is 0.001-5wt %;

[0037] (3) mixing, the para-position nano-aramid fiber water dispersion and the carbon nanotube water dispersion are mixed to form a mixed solution, the weight of the para-position nano-aramid fiber and the carbon nanotube in the mixed solution The ratio is 1: (0.1-1.2);

[0038] (4) Composite paper is prepared, and the mixed solution is sequentially subjected t...

Embodiment 1

[0056] Preparation of para-aramid nanofiber aqueous dispersion:

[0057] Add 100 parts of N-methylpyrrolidone (NMP) that has undergone water removal treatment to the reactor, add 20 parts of solubilizing salt LiCl under nitrogen protection and stirring, and heat to 80°C to dissolve it, and then cool in a cold water bath to 15°C. Add the diamine monomer (2.165 parts of p-phenylenediamine and 2.584 parts of 2,5-dichloro-p-phenylenediamine mixed monomer) into the reaction vessel, and cool the reaction vessel to 0°C after the diamine monomer is dissolved . Add 8 parts of terephthaloyl chloride monomer, and carry out polymerization reaction with high-speed stirring at 800 rpm. Stop stirring after the reaction of the above-mentioned polymerization system appears gel phenomenon. Add 2000 parts of dispersant DMF, that is, N,N-dimethylformamide, to the polymerization system, and disperse it into a macroscopically uniform viscous solution with high-speed stirring at 800 rpm. Then, 1...

Embodiment 2

[0068] Preparation of para-aramid nanofiber aqueous dispersion: add 100 parts of solvent N-methylpyrrolidone (NMP) through dewatering treatment in the reactor, under nitrogen protection and stirring, add 15 parts of solubilizing salt LiCl, and Heat to 80°C to dissolve, then cool to 10°C in a cold water bath. Add the diamine monomer (1.623 parts of p-phenylenediamine and 2.688 parts of 2,5-dichloro-p-phenylenediamine mixed monomer) into the reaction vessel, and cool the reaction vessel to 0°C after the diamine monomer is dissolved . Then add 6.12 parts of terephthaloyl dichloride monomer, and carry out polymerization reaction with high-speed stirring at 1500 rpm. Stop stirring after the reaction of the above-mentioned polymerization system appears gel phenomenon. Add 1500 parts of DMF, that is, N,N-dimethylformamide, to the polymerization system, and disperse it into a macroscopically uniform viscous solution with high-speed stirring at 1200 rpm. Then 7500 parts of ethanol w...

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Abstract

The invention discloses a para-position nanometer aramid fiber and carbon nano-tube composite paper preparation method, which comprises: obtaining a para-aramid fiber (short for ANF) aqueous dispersion liquid, obtaining a carbon nano-tube (short for CNT) aqueous dispersion liquid, and mixing the two aqueous dispersion liquids to prepare the para-aramid fiber / carbon nano-tube (ANF / CNT) composite paper. According to the method of the invention, carbon nano-tubes are adopted, the advantages of high conductivity and high radiation of the carbon nano-tubes are utilized, and a specific dispersing agent capable of opening the agglomeration among the carbon nano-tubes is added, so that the carbon nano-tubes are uniformly dispersed, and then the carbon nano-tubes are mixed with a para-aramid fiberaqueous dispersion liquid to prepare the nanometer para-aramid / carbon nano-tube composite paper; and by adding the specific dispersing agent, the carbon nano-tubes can be uniformly dispersed, so thatthe conductivity of the nanometer para-aramid / carbon nano-tube composite paper can be greatly improved while the infrared emissivity is more than 90%.

Description

technical field [0001] The invention relates to the technical field of composite paper manufacturing, in particular to a method for preparing composite paper made of para-nano aramid fibers and carbon nanotubes. Background technique [0002] Para-nano-aramid fiber (ANF) is a high-performance special material with good heat resistance, excellent mechanical properties, chemical corrosion resistance, light weight, and dense materials. It is widely used in aerospace, military equipment, electronic appliances, etc. The industry has broad application prospects. [0003] As a one-dimensional nanomaterial, carbon nanotubes are light in weight, perfectly connected in a hexagonal structure, and have many unusual mechanical, electrical, and chemical properties. In recent years, with the in-depth research of carbon nanotubes and nanomaterials, their broad application prospects are constantly showing. For example, it can be used as a material emitting far infrared rays. [0004] Far i...

Claims

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Application Information

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IPC IPC(8): D21H13/26D21H17/00D21H21/08D21F11/00D21H21/14C01B32/174C08G69/32C08G69/28
CPCC08G69/265C08G69/28C08G69/32C01B32/174D21F11/00D21H13/26D21H17/00D21H21/08D21H21/14
Inventor 陆俊董淑明
Owner 乐烯恒业(北京)科技有限公司
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