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Preparation method of carbon fiber felt/silver nanowire/polyvinylidene fluoride composite material

A technology of polyvinylidene fluoride and silver nanowires, which is applied in the field of polymer composite material preparation, can solve the problem of low electromagnetic shielding performance of composite materials, and achieve the effects of low filler content, large shielding layer thickness, and simple process

Active Publication Date: 2020-05-19
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material, which solves the problem of low electromagnetic shielding performance of composite materials in the prior art

Method used

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  • Preparation method of carbon fiber felt/silver nanowire/polyvinylidene fluoride composite material
  • Preparation method of carbon fiber felt/silver nanowire/polyvinylidene fluoride composite material
  • Preparation method of carbon fiber felt/silver nanowire/polyvinylidene fluoride composite material

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Embodiment 1

[0032] A preparation method of carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material, the specific steps are as follows:

[0033] Step 1. Mix 12ml of ethylene-propanol solution with 3ml of silver nanowire solution, stir the mixed solution for 0.5h with a vortex mixer, and mix the solution evenly to obtain a silver nanowire / ethylene-propanol solution with a mass concentration of 2mg / ml ;

[0034] Step 2. Weigh 10g of polyvinylidene fluoride and dissolve it in 90ml of N,N-dimethylformamide, stir in a water bath at 80°C for 80min to completely dissolve polyvinylidene fluoride in N,N-dimethylformamide In formamide, obtain the polyvinylidene fluoride / N,N-dimethylformamide solution that concentration is 100mg / ml;

[0035] Step 3. Soak the flexible carbon fiber felt in the silver nanowire / ethylene-propanol solution for 1 second, then take it out with tweezers and place it in a petri dish with a Teflon film, dry it at 40°C for 30 minutes, and repeat the operati...

Embodiment 2

[0039] A preparation method of carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material, the specific steps are as follows:

[0040] Step 1. Mix 12ml of ethylene-propanol solution with 3ml of silver nanowire solution, stir the mixed solution for 1 hour with a vortex mixer, and mix the solution evenly to obtain a silver nanowire / ethylene-propanol solution with a mass concentration of 2 mg / ml;

[0041] Step 2. Weigh 10g of polyvinylidene fluoride and dissolve it in 90ml of N,N-dimethylformamide, stir in a water bath at 90°C for 90min to completely dissolve polyvinylidene fluoride in N,N-dimethylformamide In formamide, obtain the polyvinylidene fluoride / N,N-dimethylformamide solution that concentration is 100mg / ml;

[0042] Step 3. Soak the flexible carbon fiber felt in the silver nanowire / ethylene-propanol solution for 3 seconds, then take it out with tweezers and place it in a petri dish with a Teflon film, and dry it at 60°C for 60 minutes , repeating the ...

Embodiment 3

[0046] A preparation method of carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material, the specific steps are as follows:

[0047] Step 1. Mix 12ml of ethylene-propanol solution with 3ml of silver nanowire solution, stir the mixed solution for 45min with a vortex mixer, and mix the solution evenly to obtain a silver nanowire / ethylene-propanol solution with a mass concentration of 2mg / ml;

[0048] Step 2. Weigh 10g of polyvinylidene fluoride and dissolve it in 90ml of N,N-dimethylformamide, stir in a water bath at 85°C for 85min to completely dissolve polyvinylidene fluoride in N,N-dimethylformamide In formamide, obtain the polyvinylidene fluoride / N,N-dimethylformamide solution that concentration is 100mg / ml;

[0049] Step 3. Soak the flexible carbon fiber felt in the silver nanowire / ethylene-propanol solution for 1-3 seconds, then take it out with tweezers and place it in a petri dish with a polytetrafluoroethylene film, at 50°C Dry 50min, repeat operation...

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Abstract

The invention discloses a preparation method of a carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material, which specifically comprises the following steps: mixing an ethyl alcohol solution with a silver nanowire solution to obtain a silver nanowire / ethyl alcohol solution; dissolving polyvinylidene fluoride particles in N,N-dimethylformamide to carry out a water bath reactionso as to obtain a polyvinylidene fluoride / N,N-dimethylformamide solution; soaking the flexible carbon fiber felt in a silver nanowire / ethyl alcohol solution; putting the carbon fiber felt into a culture dish pasted with a polytetrafluoroethylene film, drying the carbon fiber felt, repeating the operation for nine times, then soaking the carbon fiber felt in a polyvinylidene fluoride / N, N-dimethylformamide solution, then putting the carbon fiber felt into the culture dish pasted with the polytetrafluoroethylene film, and drying the carbon fiber felt to obtain the carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material. The method provided by the invention is simple in process and high in safety, can meet the application requirements of various electronic products, and realizes low filler content, relatively large shielding layer thickness and high electromagnetic shielding performance at the same time.

Description

technical field [0001] The invention belongs to the technical field of polymer composite material preparation, and in particular relates to a preparation method of a carbon fiber felt / silver nanowire / polyvinylidene fluoride composite material. Background technique [0002] In recent years, conductive polymer composites embedded with conductive fillers such as graphene, carbon nanotubes, transition metal oxides / carbonitrides, etc. are light in weight, easy to manufacture, good in corrosion resistance and have a wide frequency range. The excellent performance of absorbing and reflecting electromagnetic radiation has attracted widespread attention, but for conductive polymer composites containing conductive fillers, a large shielding layer thickness is usually required, and it has a good shielding effect, which will limit its use. Practical applications in aerospace, small portable electronic equipment and highly integrated integrated circuit communication equipment. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/16C08K7/06
CPCC08K7/06C08K2201/011C08K2201/014C08L27/16
Inventor 任鹏刚闫焕焕郭铮铮伏柏桥任芳
Owner XIAN UNIV OF TECH
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