Preparation method of carbonized loofah/graphene-carbon nanotube composite material

Abstract

The invention discloses a preparation method of a carbonized loofah / graphene-carbon nanotube composite material. The preparation method specifically comprises the following steps: dispersing grapheneand carbon nanotubes into a polyvinyl alcohol solution, pouring the obtained mixture on rectangular loofah sponge, drying in vacuum, compacting, carbonizing in a tubular furnace to obtain a CL / GNSs-CNT composite material, mixing and stirring cyanate ester and epoxy resin, casting on the CL / GNSs-CNT composite material, and curing to obtain the carbonized loofah / graphene-carbon nanotube / cyanate ester resin composite material. The CL / GNSs-CNT / CE composite material prepared by the method has excellent electromagnetic shielding performance and certain mechanical properties, and can meet the application requirements in the fields of aerospace, electronic packaging and the like.

Description

technical field

[0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing a carbonized loofah / graphene-carbon nanotube composite material. Background technique

[0002] With the development of electronic devices and electromagnetic wave technology in civilian and military fields, electromagnetic wave pollution has increasingly become a serious threat to human health and the inherent performance of nearby devices. Therefore, it is very important to design and prepare high-efficiency electromagnetic interference (EMI) shielding materials with strong shielding performance and environmental adaptability to solve this problem.

[0003] The formation of a porous structure is a major technological advancement that significantly alleviates the propagation of electromagnetic waves from the air to electromagnetic shielding materials, and significantly reduces secondary electromagnetic radiation pollution....

Examples

preparation example Construction

[0025] A kind of preparation method of carbonized loofah / graphene-carbon nanotube (CL / GNSs-CNT / CE) composite material of the present invention, concrete steps are as follows:

[0026] Step 1, dissolving polyvinyl alcohol particles in deionized water and reacting in a water bath at 90°C for 1-2 hours to obtain a polyvinyl alcohol solution with a mass concentration of 80 mg / mL;

[0027] Step 2, dispersing graphene and carbon nanotubes in a polyvinyl alcohol solution, and ultrasonically stirring for 30 to 60 minutes to obtain a graphene-carbon nanotube / polyvinyl alcohol solution;

[0028] The mass ratio of graphene, carbon nanotubes and polyvinyl alcohol solution is 0.025-0.062:0.008:10;

[0029] The producers of graphene are Xiamen Knano Graphene Company; the producers of carbon nanotubes are Nanocyl S.A.Nanocyl NC7000 of Belgium.

[0030] The thickness of graphene is <30nm; the average diameter of carbon nanotubes is 9.5nm;

[0031] Step 3, preparing carbonized loofah / graphen...

Embodiment 1

[0040] A kind of preparation method of CL / GNSs-CNT / CE composite material, concrete steps are as follows:

[0041] Step 1: Dissolve 8g of polyvinyl alcohol particles in 92ml of deionized water and react in a water bath at 90°C for 1 hour to obtain a polyvinyl alcohol solution with a mass concentration of 80mg / mL;

[0042] Step 2, disperse 3wt% graphene and 1wt% carbon nanotubes in 10ml of the above-mentioned polyvinyl alcohol solution, and ultrasonically stir for 30min to 60min to obtain a graphene-carbon nanotube / polyvinyl alcohol solution;

[0043] Step 3, preparing CL / GNSs-CNT composite material, the specific steps are as follows:

[0044] Step 3.1, wash the loofah, cut out a rectangle with a size of 40×30mm, place it in a vacuum oven at 60°C for drying, and pour the graphene-carbon nanotube / polyvinyl alcohol solution on the loofah, so that the solution is evenly wrapped in the On the loofah fiber, place it in a 60°C vacuum oven for drying and then compact it;

[0045] Ste...

Embodiment 2

[0050] A kind of preparation method of CL / GNSs-CNT / CE composite material, concrete steps are as follows:

[0051] Step 1: Dissolve 8g of polyvinyl alcohol particles in 92ml of deionized water and react in a water bath at 90°C for 1-2 hours to obtain a polyvinyl alcohol solution with a mass concentration of 80mg / ml;

[0052] Step 2, disperse 5wt% graphene and 1wt% carbon nanotubes in the above-mentioned polyvinyl alcohol solution of 10ml, and ultrasonically stir for 40min to obtain a graphene-carbon nanotube / polyvinyl alcohol solution;

[0053] Step 3, preparing CL / GNSs-CNT composite material, the specific steps are as follows:

[0054] Step 3.1, wash the loofah, cut out a rectangle with a size of 40×30mm, place it in a vacuum oven at 60°C for drying, and pour the graphene-carbon nanotube / polyvinyl alcohol solution on the loofah, so that the solution is evenly wrapped in the On the loofah fiber, place it in a 60°C vacuum oven for drying and then compact it;

[0055] Step 3.2,...

technical field

[0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a method for preparing a carbonized loofah / graphene-carbon nanotube composite material. Background technique

[0002] With the development of electronic devices and electromagnetic wave technology in civilian and military fields, electromagnetic wave pollution has increasingly become a serious threat to human health and the inherent performance of nearby devices. Therefore, it is very important to design and prepare high-efficiency electromagnetic interference (EMI) shielding materials with strong shielding performance and environmental adaptability to solve this problem.

[0003] The formation of a porous structure is a major technological advancement that significantly alleviates the propagation of electromagnetic waves from the air to electromagnetic shielding materials, and significantly reduces secondary electromagnetic radiation pollution....

Examples

preparation example Construction

[0025] A kind of preparation method of carbonized loofah / graphene-carbon nanotube (CL / GNSs-CNT / CE) composite material of the present invention, concrete steps are as follows:

[0026] Step 1, dissolving polyvinyl alcohol particles in deionized water and reacting in a water bath at 90°C for 1-2 hours to obtain a polyvinyl alcohol solution with a mass concentration of 80 mg / mL;

[0027] Step 2, dispersing graphene and carbon nanotubes in a polyvinyl alcohol solution, and ultrasonically stirring for 30 to 60 minutes to obtain a graphene-carbon nanotube / polyvinyl alcohol solution;

[0028] The mass ratio of graphene, carbon nanotubes and polyvinyl alcohol solution is 0.025-0.062:0.008:10;

[0029] The producers of graphene are Xiamen Knano Graphene Company; the producers of carbon nanotubes are Nanocyl S.A.Nanocyl NC7000 of Belgium.

[0030] The thickness of graphene is <30nm; the average diameter of carbon nanotubes is 9.5nm;

[0031] Step 3, preparing carbonized loofah / graphen...

Embodiment 1

[0040] A kind of preparation method of CL / GNSs-CNT / CE composite material, concrete steps are as follows:

[0041] Step 1: Dissolve 8g of polyvinyl alcohol particles in 92ml of deionized water and react in a water bath at 90°C for 1 hour to obtain a polyvinyl alcohol solution with a mass concentration of 80mg / mL;

[0042] Step 2, disperse 3wt% graphene and 1wt% carbon nanotubes in 10ml of the above-mentioned polyvinyl alcohol solution, and ultrasonically stir for 30min to 60min to obtain a graphene-carbon nanotube / polyvinyl alcohol solution;

[0043] Step 3, preparing CL / GNSs-CNT composite material, the specific steps are as follows:

[0044] Step 3.1, wash the loofah, cut out a rectangle with a size of 40×30mm, place it in a vacuum oven at 60°C for drying, and pour the graphene-carbon nanotube / polyvinyl alcohol solution on the loofah, so that the solution is evenly wrapped in the On the loofah fiber, place it in a 60°C vacuum oven for drying and then compact it;

[0045] Ste...

Embodiment 2

[0050] A kind of preparation method of CL / GNSs-CNT / CE composite material, concrete steps are as follows:

[0051] Step 1: Dissolve 8g of polyvinyl alcohol particles in 92ml of deionized water and react in a water bath at 90°C for 1-2 hours to obtain a polyvinyl alcohol solution with a mass concentration of 80mg / ml;

[0052] Step 2, disperse 5wt% graphene and 1wt% carbon nanotubes in the above-mentioned polyvinyl alcohol solution of 10ml, and ultrasonically stir for 40min to obtain a graphene-carbon nanotube / polyvinyl alcohol solution;

[0053] Step 3, preparing CL / GNSs-CNT composite material, the specific steps are as follows:

[0054] Step 3.1, wash the loofah, cut out a rectangle with a size of 40×30mm, place it in a vacuum oven at 60°C for drying, and pour the graphene-carbon nanotube / polyvinyl alcohol solution on the loofah, so that the solution is evenly wrapped in the On the loofah fiber, place it in a 60°C vacuum oven for drying and then compact it;

[0055] Step 3.2,...

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