CN111269570A - Preparation method of carbonized towel gourd/graphene-carbon nanotube composite material - Google Patents
Preparation method of carbonized towel gourd/graphene-carbon nanotube composite material Download PDFInfo
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Abstract
The invention discloses a preparation method of a carbonized towel gourd/graphene-carbon nanotube composite material, which comprises the following steps: dispersing graphene and carbon nanotubes in a polyvinyl alcohol solution, pouring the polyvinyl alcohol solution on rectangular loofah sponge, drying in vacuum, compacting, then putting the rectangular loofah sponge into a tube furnace for carbonization to obtain a CL/GNSs-CNT composite material, mixing and stirring cyanate and epoxy resin, then casting the mixture on the CL/GNSs-CNT composite material, and curing to obtain the carbonized loofah/graphene-carbon nanotube/cyanate resin composite material. The CL/GNSs-CNT/CE composite material prepared by the method has excellent electromagnetic shielding performance and certain mechanical property, and can meet the application requirements in the fields of aerospace, electronic packaging and the like.
Description
Technical Field
The invention belongs to the technical field of composite material preparation, and particularly relates to a preparation method of a carbonized towel gourd/graphene-carbon nanotube composite material.
Background
With the development of electronic devices and electromagnetic wave technology in the civil and military fields, electromagnetic wave pollution has increasingly become a serious threat to human health and inherent performance of nearby devices. Therefore, designing and preparing a highly efficient electromagnetic interference (EMI) shielding material having strong shielding performance and environmental suitability is of great importance to solve this problem.
The formation of the porous structure is a great technical progress for remarkably relieving the transmission of electromagnetic waves from air to the electromagnetic shielding material, so that the secondary electromagnetic radiation pollution is remarkably reduced. In recent years, the biomass charcoal has excellent performance and environmental protection property, and is applied to electrocatalysts and CO2The method has wide application prospect in the fields of adsorbents, supercapacitors, electromagnetic wave absorbents and the like. Luffa cylindrica is one of the most common biological raw materials in the world, is widely planted in temperate and tropical regions, and has certain edible and medicinal values. It is composed of cellulose, hemicellulose and lignin. The key point is that the natural towel gourd presents a microscopic cell structure after being carbonized, and keeps the original morphological characteristics, which is beneficial to constructing a complete three-dimensional interconnected conductive network and is regarded as an advanced candidate material for electromagnetic shielding due to the unique cellular porous structure. In order to further improve the conductivity of the carbonized biomass-based raw material and thus the EMI-SE value thereof, secondary conductive fillers such as AgNWs, Carbon Nanotubes (CNTs) and Graphene Nanoplates (GNSs) can be introduced into the prepared composite material. Among them, CNTs and GNSs have been proven to be excellent electromagnetic shielding materials due to their ultra-high electrical conductivity, light weight, corrosion resistance, high thermal stability, and the like. Researches show that the three-dimensional high-connectivity conductive network of the composite material plays a crucial role in the conductivity and the electromagnetic shielding effect of the composite material. In view of the pressing needs for rapidly developing aerospace and defense applications, Cyanate Esters (CE) are used as polymer matrices with their very low hygroscopicity, good mechanical properties, excellent radiation resistance and excellent dimensional stability.
Disclosure of Invention
The invention aims to provide a preparation method of a carbonized towel gourd/graphene-carbon nanotube (CL/GNSs-CNT/CE) composite material, and solves the problem of low electromagnetic shielding performance of the composite material in the prior art.
The technical scheme adopted by the invention is that the preparation method of the carbonized towel gourd/graphene-carbon nanotube composite material comprises the following specific steps:
step 1, dissolving polyvinyl alcohol particles in deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/mL;
step 2, dispersing graphene and carbon nanotubes in a polyvinyl alcohol solution, and performing ultrasonic stirring to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing a carbonized towel gourd/graphene-carbon nanotube composite material;
and 4, preparing the carbonized towel gourd/graphene-carbon nanotube/cyanate resin composite material.
The present invention is also characterized in that,
in the step 2, the mass ratio of the graphene to the carbon nano tube to the polyvinyl alcohol solution is 0.025-0.062: 0.008: 10; the stirring time is 30 min-60 min.
In the step 3, the carbonized towel gourd/graphene-carbon nanotube composite material is prepared by the following specific steps:
step 3.1, cleaning loofah sponge, cutting into rectangular loofah sponge with the size of 40 x 30mm, placing the rectangular loofah sponge in a vacuum oven at 60 ℃ for drying for 4h, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the rectangular loofah sponge, placing the rectangular loofah sponge in the vacuum oven at 60 ℃ for drying for 4h, and then compacting;
the mass ratio of the rectangular loofah sponge to the graphene-carbon nanotube/polyvinyl alcohol solution is 3: 10;
and 3.2, putting the compacted rectangular loofah sponge into a tubular furnace for carbonization to obtain the carbonized loofah/graphene-carbon nanotube composite material.
In step 3.2, the carbonization conditions are specifically as follows: introducing nitrogen at the speed of 50-100 mL/s, heating to 800-1200 ℃ at the speed of 5 ℃/min, preserving the heat for 2h, and cooling to room temperature.
In step 4, the method specifically comprises the following steps: mixing cyanate and epoxy resin, stirring for 30min at 80 ℃, then casting the mixture on the carbonized towel gourd/graphene-carbon nano tube composite material, firstly curing the mixture for 1h at 120 ℃, then curing the mixture for 2h at 150 ℃, then curing the mixture for 2h at 180 ℃, and finally curing the mixture for 2h at 200 ℃ to obtain the carbonized towel gourd/graphene-carbon nano tube/cyanate resin composite material.
The mass ratio of the cyanate, the epoxy resin and the carbonized towel gourd/graphene-carbon nanotube composite material is 4: 1: 8.
the invention has the beneficial effects that the composite material with low filler, low thickness and high electromagnetic shielding performance is prepared by the design of the highly interconnected three-dimensional conductive network; meanwhile, the preparation method is simple, convenient and feasible, has lower production cost and is easy for batch production.
Drawings
FIG. 1 is a graph of the overall electromagnetic Shielding Effectiveness (SE) of CL/GNSs-CNT/CE composites at different graphene contents in the process of the inventionT) A drawing;
FIG. 2 is SE of CL/GNSs-CNT/CE composite materials at different graphene contents in the method of the present inventionR、SEAA drawing;
FIG. 3 is a graph showing the total electromagnetic Shielding Effectiveness (SE) of CL/GNSs-CNT/CE composites at different carbonization temperatures in the process of the present inventionT) A drawing;
FIG. 4 is a SE of a CL/GNSs-CNT/CE composite at different carbonization temperatures in the process of the inventionR、SEAFigure (a).
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a preparation method of a carbonized towel gourd/graphene-carbon nanotube (CL/GNSs-CNT/CE) composite material, which comprises the following specific steps of:
step 1, dissolving polyvinyl alcohol particles in deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/mL;
step 2, dispersing graphene and carbon nanotubes in a polyvinyl alcohol solution, and ultrasonically stirring for 30-60 min to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
the mass ratio of the graphene to the carbon nano tube to the polyvinyl alcohol solution is 0.025-0.062: 0.008: 10;
the producers of graphene are respectively Xiamen Knano graphene company; the carbon nanotube production was produced by Nanocyl s.a. Nanocyl NC7000, belgium.
The thickness of the graphene is <30 nm; the average diameter of the carbon nanotubes was 9.5 nm;
step 3, preparing the carbonized towel gourd/graphene-carbon nanotube (CL/GNSs-CNT) composite material, which comprises the following steps:
step 3.1, cleaning loofah sponge, cutting into rectangular loofah sponge with the size of 40 x 30mm, placing the rectangular loofah sponge in a vacuum oven at 60 ℃ for drying for 4 hours, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the rectangular loofah sponge to enable the solution to be uniformly wrapped on rectangular loofah sponge fibers, placing the rectangular loofah sponge in the vacuum oven at 60 ℃ for drying for 4 hours, and then compacting;
the mass ratio of the rectangular loofah sponge to the graphene-carbon nanotube/polyvinyl alcohol solution is 3: 10;
step 3.2, putting the compacted rectangular loofah sponge into a tubular furnace for carbonization to obtain a carbonized loofah/graphene-carbon nanotube (CL/GNSs-CNT) composite material;
the carbonization conditions are specifically as follows: introducing nitrogen at the speed of 50-100 mL/s, heating to 800-1200 ℃ at the speed of 5 ℃/min, preserving heat for 2h, and cooling to room temperature;
step 4, preparing a carbonized towel gourd/graphene-carbon nanotube/cyanate resin (CL/GNSs-CNT/CE) composite material;
the method specifically comprises the following steps: mixing cyanate (BADCy) and epoxy resin (E-51), stirring for 30min at the temperature of 80 ℃, then casting on the CL/GNSs-CNT composite material, curing for 1h at the temperature of 120 ℃, curing for 2h at the temperature of 150 ℃, then curing for 2h at the temperature of 180 ℃, and finally curing for 2h at the temperature of 200 ℃ to obtain the carbonized towel gourd/graphene-carbon nanotube/cyanate resin (CL/GNSs-CNT/CE) composite material.
The mass ratio of the cyanate ester to the epoxy resin to the CL/GNSs-CNT composite material is 4: 1: 8.
example 1
A preparation method of a CL/GNSs-CNT/CE composite material comprises the following specific steps:
step 1, dissolving 8g of polyvinyl alcohol particles in 92mL of deionized water, and reacting in a water bath kettle at 90 ℃ for 1h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/mL;
step 2, dispersing 3 wt% of graphene and 1 wt% of carbon nanotubes in 10ml of the polyvinyl alcohol solution, and ultrasonically stirring for 30-60 min to obtain graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing the CL/GNSs-CNT composite material, which comprises the following steps:
step 3.1, cleaning the loofah sponge, cutting a rectangle with the size of 40 multiplied by 30mm, placing the rectangle in a vacuum oven with the temperature of 60 ℃ for drying, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the loofah sponge to enable the solution to be uniformly wrapped on the loofah sponge fiber, placing the loofah sponge in the vacuum oven with the temperature of 60 ℃ for drying, and then compacting;
step 3.2, putting the compacted towel gourd into a rectangular ship special for a tubular furnace, and preserving heat for 2 hours at 800 ℃ in a uniform nitrogen atmosphere at the heating rate of 5 ℃/min to obtain the CL/GNSs-CNT composite material;
step 4, preparing a CL/GNSs-CNT/CE composite material;
the method specifically comprises the following steps: mixing 2g of cyanate ester (BADCy) and 0.5g of epoxy resin (E-51) at 80 ℃, stirring for 30min, casting on CL/GNSs-CNT, curing at 120 ℃ for 1h, curing at 150 ℃ for 2h, curing at 180 ℃ for 2h, and curing at 200 ℃ for 2h to obtain the CL/GNSs-CNT/CE composite material.
Compared with the commercial electromagnetic shielding material (20dB), the electromagnetic shielding effectiveness of the CL/GNSs-CNT/CE composite material prepared in the example 1 is 23.6dB, which is correspondingly improved by 18 percent.
Example 2
A preparation method of a CL/GNSs-CNT/CE composite material comprises the following specific steps:
step 1, dissolving 8g of polyvinyl alcohol particles in 92ml of deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/ml;
step 2, dispersing 5 wt% of graphene and 1 wt% of carbon nanotubes in 10ml of the polyvinyl alcohol solution, and ultrasonically stirring for 40min to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing the CL/GNSs-CNT composite material, which comprises the following steps:
step 3.1, cleaning the loofah sponge, cutting a rectangle with the size of 40 multiplied by 30mm, placing the rectangle in a vacuum oven with the temperature of 60 ℃ for drying, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the loofah sponge to enable the solution to be uniformly wrapped on the loofah sponge fiber, placing the loofah sponge in the vacuum oven with the temperature of 60 ℃ for drying, and then compacting;
step 3.2, putting the compacted towel gourd into a rectangular ship special for a tubular furnace, and preserving heat for 2 hours at 800 ℃ in a uniform nitrogen atmosphere at the heating rate of 5 ℃/min to obtain the CL/GNSs-CNT composite material;
step 4, preparing a CL/GNSs-CNT/CE composite material:
the method specifically comprises the following steps: mixing 2g of cyanate ester (BADCy) and 0.5g of epoxy resin (E-51) at 80 ℃, stirring for 30min, casting on CL/GNSs-CNT, curing at 120 ℃ for 1h, curing at 150 ℃ for 2h, curing at 180 ℃ for 2h, and curing at 200 ℃ for 2h to obtain the CL/GNSs-CNT/CE composite material.
Compared with the commercial electromagnetic shielding material (20dB), the electromagnetic shielding effectiveness of the CL/GNSs-CNT/CE composite material prepared in the example 2 is 25.9dB, which is correspondingly improved by 29.5%.
Example 3
A preparation method of a CL/GNSs-CNT/CE composite material comprises the following specific steps:
step 1, dissolving 8g of polyvinyl alcohol particles in 92ml of deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/ml;
step 2, dispersing 7 wt% of graphene and 1 wt% of carbon nanotubes in 10ml of the polyvinyl alcohol solution, and ultrasonically stirring for 45min to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing the CL/GNSs-CNT composite material, which comprises the following steps:
step 3.1, cleaning the loofah sponge, cutting a rectangle with the size of 40 multiplied by 30mm, placing the rectangle in a vacuum oven with the temperature of 60 ℃ for drying, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the loofah sponge to enable the solution to be uniformly wrapped on the loofah sponge fiber, placing the loofah sponge in the vacuum oven with the temperature of 60 ℃ for drying, and then compacting;
step 3.2, putting the compacted towel gourd into a rectangular ship special for a tubular furnace, and preserving heat for 2 hours at 800 ℃ in a uniform nitrogen atmosphere at the heating rate of 5 ℃/min to obtain the CL/GNSs-CNT composite material;
step 4, preparing a CL/GNSs-CNT/CE composite material:
the method specifically comprises the following steps: mixing 2g of cyanate ester (BADCy) and 0.5g of epoxy resin (E-51) at 80 ℃, stirring for 30min, casting on CL/GNSs-CNT, curing at 120 ℃ for 1h, curing at 150 ℃ for 2h, curing at 180 ℃ for 2h, and curing at 200 ℃ for 2h to obtain the CL/GNSs-CNT/CE composite material.
Compared with the commercial electromagnetic shielding material (20dB), the electromagnetic shielding effectiveness of the CL/GNSs-CNT/CE composite material prepared in example 3 is 28.2dB, which is improved by 41 percent correspondingly.
Example 4
A preparation method of a CL/GNSs-CNT/CE composite material comprises the following specific steps:
step 1, dissolving 8g of polyvinyl alcohol particles in 92ml of deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/ml;
step 2, dispersing 7 wt% of graphene and 1 wt% of carbon nanotubes in 10ml of the polyvinyl alcohol solution, and ultrasonically stirring for 50min to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing the CL/GNSs-CNT composite material, which comprises the following steps:
step 3.1, cleaning the loofah sponge, cutting a rectangle with the size of 40 multiplied by 30mm, placing the rectangle in a vacuum oven with the temperature of 60 ℃ for drying, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the loofah sponge to enable the solution to be uniformly wrapped on the loofah sponge fiber, placing the loofah sponge in the vacuum oven with the temperature of 60 ℃ for drying, and then compacting;
step 3.2, putting the compacted towel gourd into a rectangular ship special for a tubular furnace, and preserving heat for 2 hours at 1000 ℃ in a uniform nitrogen atmosphere at the heating rate of 5 ℃/min to obtain the CL/GNSs-CNT composite material;
step 4, preparing a CL/GNSs-CNT/CE composite material:
the method specifically comprises the following steps: mixing 2g of cyanate ester (BADCy) and 0.5g of epoxy resin (E-51) at 80 ℃, stirring for 30min, casting on CL/GNSs-CNT, curing at 120 ℃ for 1h, curing at 150 ℃ for 2h, curing at 180 ℃ for 2h, and curing at 200 ℃ for 2h to obtain the CL/GNSs-CNT/CE composite material.
Compared with the commercial electromagnetic shielding material (20dB), the electromagnetic shielding effectiveness of the CL/GNSs-CNT/CE composite material prepared in the example 4 is 30.7dB, which is correspondingly improved by 53.5%.
Example 5
A preparation method of a CL/GNSs-CNT/CE composite material comprises the following specific steps:
step 1, dissolving 8g of polyvinyl alcohol particles in 92ml of deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/ml;
step 2, dispersing 7 wt% of graphene and 1 wt% of carbon nanotubes in 10ml of the polyvinyl alcohol solution, and ultrasonically stirring for 60min to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing the CL/GNSs-CNT composite material, which comprises the following steps:
step 3.1, cleaning the loofah sponge, cutting a rectangle with the size of 40 multiplied by 30mm, placing the rectangle in a vacuum oven with the temperature of 60 ℃ for drying, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the loofah sponge to enable the solution to be uniformly wrapped on the loofah sponge fiber, placing the loofah sponge in the vacuum oven with the temperature of 60 ℃ for drying, and then compacting;
step 3.2, putting the compacted towel gourd into a rectangular ship special for a tubular furnace, and keeping the temperature at 1200 ℃ for 2h in a uniform nitrogen atmosphere at the heating rate of 5 ℃/min to obtain the CL/GNSs-CNT composite material;
step 4, preparing a CL/GNSs-CNT/CE composite material:
the method specifically comprises the following steps: mixing 2g of cyanate ester (BADCy) and 0.5g of epoxy resin (E-51) at 80 ℃, stirring for 30min, casting on CL/GNSs-CNT, curing at 120 ℃ for 1h, curing at 150 ℃ for 2h, curing at 180 ℃ for 2h, and curing at 200 ℃ for 2h to obtain the CL/GNSs-CNT/CE composite material.
Compared with the commercial electromagnetic shielding material (20dB), the electromagnetic shielding effectiveness of the CL/GNSs-CNT/CE composite material prepared in the example 5 is 35.8dB, and is correspondingly improved by 79%.
SE (styrene) of CL/GNSs-CNT/CE composite material with different graphene contents prepared by using methodTAs shown in fig. 1, as the content of graphene increases, the shielding performance is improved; SE of CL/GNSs-CNT/CE composite at different carbonization temperaturesTAs shown in fig. 3, the shielding effectiveness increases with increasing carbonization temperature. FIGS. 2 and 4 show SE of the composite material at different filler contents and carbonization temperaturesR、SEAIt is evident from the figure that the shielding mechanism is mainly absorbing and very small reflecting, all<5dB, the CL/GNSs-CNT/CE composite material shows excellent electromagnetic shielding performance.
The action mechanism of the method is as follows: by using the CL/GNSs-CNT/CE composite material with the three-dimensional network structure, when electromagnetic waves enter, the incident electromagnetic waves and the surface have excellent impedance matching, so that the electromagnetic waves easily enter the interior of the material. In the special porous structure, the cross-linked tubes are densely arranged and the dihedral angles are large, and then incident electromagnetic waves are attenuated by multiple reflection and scattering in the porous structure, so that excellent electromagnetic shielding performance is obtained.
In the present invention, a multi-layer CL/GNSs-CNT/CE composite is prepared. The unique design of the three-dimensional structure of the composite material enables electromagnetic waves to enter more easily, and incident waves are attenuated by multiple reflection and scattering in the porous structure, so that excellent electromagnetic shielding performance is obtained. Cyanate ester resins have been selected as polymer matrices for their wide application in various fields due to their extremely low hygroscopicity, good mechanical properties, excellent radiation resistance, and excellent dimensional stability. When the graphene content and the carbon nano tube content of the prepared composite material in the polyvinyl alcohol solution are 7 wt% and 1 wt%, and the carbonization temperature is 1200 ℃, the electromagnetic shielding effectiveness is 35.8 dB. This provides a feasible solution for manufacturing electromagnetic shielding materials with certain mechanical properties and excellent electromagnetic shielding properties.
The preparation method of the CL/GNSs-CNT/CE composite material has the advantages that the CL/GNSs-CNT/CE composite material with high electromagnetic shielding performance is prepared by a high-temperature carbonization method, the preparation process is safe and environment-friendly, the preparation process is simple, the cost is low, and the CL/GNSs-CNT/CE composite material has wide practicability and popularization value; the CL/GNSs-CNT/CE composite material prepared by the preparation method disclosed by the invention has excellent electromagnetic shielding performance and can meet the application requirements in the fields of aerospace, electronic packaging and the like.
Claims (6)
1. A preparation method of a carbonized towel gourd/graphene-carbon nanotube composite material is characterized by comprising the following specific steps:
step 1, dissolving polyvinyl alcohol particles in deionized water, and reacting in a water bath kettle at 90 ℃ for 1-2 h to obtain a polyvinyl alcohol solution with the mass concentration of 80 mg/mL;
step 2, dispersing graphene and carbon nanotubes in a polyvinyl alcohol solution, and performing ultrasonic stirring to obtain a graphene-carbon nanotube/polyvinyl alcohol solution;
step 3, preparing a carbonized towel gourd/graphene-carbon nanotube composite material;
and 4, preparing the carbonized towel gourd/graphene-carbon nanotube/cyanate resin composite material.
2. The method for preparing the carbonized luffa/graphene-carbon nanotube composite material according to claim 1, wherein in the step 2, the mass ratio of the graphene to the carbon nanotubes to the polyvinyl alcohol solution is 0.025-0.062: 0.008: 10; the stirring time is 30 min-60 min.
3. The method for preparing a carbonized luffa/graphene-carbon nanotube composite material according to claim 1, wherein in step 3, the carbonized luffa/graphene-carbon nanotube composite material is prepared by the following specific steps:
step 3.1, cleaning loofah sponge, cutting into rectangular loofah sponge with the size of 40 x 30mm, placing the rectangular loofah sponge in a vacuum oven at 60 ℃ for drying for 4h, pouring graphene-carbon nano tube/polyvinyl alcohol solution on the rectangular loofah sponge, placing the rectangular loofah sponge in the vacuum oven at 60 ℃ for drying for 4h, and then compacting;
the mass ratio of the rectangular loofah sponge to the graphene-carbon nanotube/polyvinyl alcohol solution is 3: 10;
and 3.2, putting the compacted rectangular loofah sponge into a tubular furnace for carbonization to obtain the carbonized loofah/graphene-carbon nanotube composite material.
4. The method for preparing a carbonized luffa/graphene-carbon nanotube composite material according to claim 3, wherein in step 3.2, the carbonization conditions are specifically as follows: introducing nitrogen at the speed of 50-100 mL/s, heating to 800-1200 ℃ at the speed of 5 ℃/min, preserving the heat for 2h, and cooling to room temperature.
5. The method for preparing a carbonized luffa/graphene-carbon nanotube composite material according to claim 1, wherein in the step 4, specifically: mixing cyanate and epoxy resin, stirring for 30min at 80 ℃, then casting the mixture on the carbonized towel gourd/graphene-carbon nano tube composite material, firstly curing the mixture for 1h at 120 ℃, then curing the mixture for 2h at 150 ℃, then curing the mixture for 2h at 180 ℃, and finally curing the mixture for 2h at 200 ℃ to obtain the carbonized towel gourd/graphene-carbon nano tube/cyanate resin composite material.
6. The preparation method of the carbonized loofah/graphene-carbon nanotube composite material according to claim 5, wherein the mass ratio of the cyanate ester to the epoxy resin to the carbonized loofah/graphene-carbon nanotube composite material is 4: 1: 8.
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| CN112911919A (en) * | 2021-02-04 | 2021-06-04 | 四川大学 | Carbonized loofah sponge/nano nickel/rGO electromagnetic shielding material and preparation method thereof |
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| CN113980427A (en) * | 2021-11-01 | 2022-01-28 | 陕西工业职业技术学院 | Epoxy resin-based biomass charcoal electromagnetic shielding composite material and preparation method thereof |
| CN114247417A (en) * | 2021-12-02 | 2022-03-29 | 北京市科学技术研究院城市安全与环境科学研究所 | Compaction-preventing loofah sponge composite filler and preparation method and application thereof |
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| CN112911919A (en) * | 2021-02-04 | 2021-06-04 | 四川大学 | Carbonized loofah sponge/nano nickel/rGO electromagnetic shielding material and preparation method thereof |
| CN112911920A (en) * | 2021-02-08 | 2021-06-04 | 西安理工大学 | Preparation method of MXene-carbon aerogel/TPU composite material |
| CN113831686A (en) * | 2021-09-18 | 2021-12-24 | 安徽农业大学 | Preparation method of porous network composite material with shielding and sound absorption functions |
| CN113831686B (en) * | 2021-09-18 | 2024-05-24 | 安徽农业大学 | Preparation method of porous network composite material with shielding and sound absorbing functions |
| CN113980427A (en) * | 2021-11-01 | 2022-01-28 | 陕西工业职业技术学院 | Epoxy resin-based biomass charcoal electromagnetic shielding composite material and preparation method thereof |
| CN114247417A (en) * | 2021-12-02 | 2022-03-29 | 北京市科学技术研究院城市安全与环境科学研究所 | Compaction-preventing loofah sponge composite filler and preparation method and application thereof |
| CN114247417B (en) * | 2021-12-02 | 2024-03-29 | 北京市科学技术研究院城市安全与环境科学研究所 | Anti-compaction loofah sponge composite filler and preparation method and application thereof |
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