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Rare earth doped carbon nanotube/polyvinyl chloride composite wave-absorbing film material

A polyvinyl chloride and carbon nanotube technology, applied in other chemical processes, chemical instruments and methods, etc., can solve the problems of single peak value and narrow absorption bandwidth, and achieve the effect of strong absorption

Inactive Publication Date: 2013-10-02
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above research has achieved many results, it has the disadvantages of narrow absorbing bandwidth and single peak

Method used

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  • Rare earth doped carbon nanotube/polyvinyl chloride composite wave-absorbing film material
  • Rare earth doped carbon nanotube/polyvinyl chloride composite wave-absorbing film material
  • Rare earth doped carbon nanotube/polyvinyl chloride composite wave-absorbing film material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The process flow is attached figure 1 .

[0033] The process flow is attached figure 1 , using the temperature-controlled arc method to prepare multi-walled carbon nanotubes with a diameter ranging from 7 to 50 nm. After pretreatment such as rare earth (lanthanum nitrate) doping, it is used as an absorber for composite wave-absorbing films; DOP is used as a plasticizer and styrene is used as a crosslinking agent to establish a uniform and stable nanocomposite dispersion system; it is prepared by mechanical calendering technology Resin composite films based on multi-walled carbon nanotubes.

[0034] The specific steps for preparing the composite wave-absorbing film are as follows:

[0035]Step 1: mixing lanthanum nitrate with acidified carbon nanotubes, then ultrasonic and ball milling; the addition of the lanthanum nitrate is less than 1wt.% of the acidified carbon nanotubes;

[0036] Step 2: Weighing a certain amount of polyvinyl chloride and dissolving it in an or...

Embodiment 2

[0041] : Step 1: lanthanum nitrate is mixed with acidified carbon nanotubes, then ultrasonic and ball milled; the addition of said lanthanum nitrate is less than 5wt.% of acidified carbon nanotubes;

[0042] Step 2: Weighing a certain amount of polyvinyl chloride and dissolving it in tetrahydrofuran organic solvent to form a 16% W / V polyvinyl chloride-tetrahydrofuran solution; the amount of polyvinyl chloride added is 10wt% of tetrahydrofuran;

[0043] Step 3: Under magnetic stirring, add the lanthanum nitrate-carbon nanotube powder obtained in step 1 into the polyvinyl chloride-tetrahydrofuran solution to form a lanthanum nitrate-carbon nanotube / polyvinyl chloride black colloid solution; the lanthanum nitrate-carbon nanotube The addition of pipe powder is 8wt.% of polyvinyl chloride;

[0044] Step 4: Add the plasticizer DOP and the crosslinking agent styrene into the lanthanum nitrate-carbon nanotube / polyvinyl chloride black colloid solution, stir evenly and pour it into a se...

Embodiment 3

[0047] Step 1: mixing lanthanum nitrate with acidified carbon nanotubes, then ultrasonic and ball milling; the amount of lanthanum nitrate added is less than 9wt.% of the acidified carbon nanotubes;

[0048] Step 2: Weighing a certain amount of polyvinyl chloride and dissolving it in a tetrahydrofuran organic solvent to form a 16% W / V polyvinyl chloride-tetrahydrofuran solution; the amount of polyvinyl chloride added is 20wt% of tetrahydrofuran;

[0049] Step 3: Under magnetic stirring, add the lanthanum nitrate-carbon nanotube powder obtained in step 1 into the polyvinyl chloride-tetrahydrofuran solution to form a lanthanum nitrate-carbon nanotube / polyvinyl chloride black colloid solution; the lanthanum nitrate-carbon nanotube The addition of pipe powder is 15wt.% of polyvinyl chloride;

[0050] Step 4: Add the plasticizer DOP and the crosslinking agent styrene into the lanthanum nitrate-carbon nanotube / polyvinyl chloride black colloid solution, stir evenly and pour it into a...

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Abstract

The invention relates to a preparation method of a metal doped carbon nanotube / polyvinyl chloride composite wave-absorbing film material. The method is characterized in that the method comprises the following steps: preprocessing carbon nanotubes by using a mixed acid, mixing a certain amount of lanthanum nitrate and the carbon nanotubes in an aqueous solution, carrying out ultrasonic treatment at a certain temperature for 1h, drying, and grinding to obtain a material for later use; and sequentially adding a certain amount of lanthanum nitrate doped carbon nanotubes, a plasticizer, a cross-linking agent and the like to a tetrahydrofuran solution of polyvinyl chloride, carrying out ultrasonic treatment, magnetically stirring for uniform mixing, injecting the obtained colloidal solution to a die, and drying at room temperature for 24h to obtain the rare earth doped carbon nanotube / polyvinyl chloride composite wave-absorbing film material. The preparation method of a composite wave-absorbing film is economic and suitable, and is simple to operate. The rare earth doping enhances the electromagnetic wave absorbing performance of multiwall carbon nanotubes in a 2-18GHz range.

Description

technical field [0001] The invention relates to a preparation technology of a composite wave-absorbing film, and in particular provides a preparation method of a rare-earth-doped carbon nanotube / polyvinyl chloride composite wave-absorbing film. Background technique [0002] The new nano-absorbing material is considered to be the most powerful new-generation nano-absorbing material due to its characteristics of light weight, small thickness, strong absorption, wide absorption frequency band, and good compatibility (that is, the four characteristics of "light, thin, strong, and wide"). Development potential of absorbing materials. New nano-absorbing materials mainly include: nano-metal and alloy, nano-oxide, nano-SiC, nano-ferrite, nano-graphite, nano-Si / C / N and Si / C / N / O, nano-metal film / insulating dielectric film , nano conductive polymers, nano nitrides and carbon nanotubes, etc. [0003] Carbon nanotube (Carbon Nanotube, CNT) is a representative nanomaterial. Due to its s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/06C09K3/00C08K13/06C08K9/00C08K7/00C08K3/04C08K3/28C08F259/04B29C43/24
Inventor 赵廷凯李铁虎侯翠岭
Owner NORTHWESTERN POLYTECHNICAL UNIV
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