CN111916916A - Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof - Google Patents
Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof Download PDFInfo
- Publication number
- CN111916916A CN111916916A CN202010659985.4A CN202010659985A CN111916916A CN 111916916 A CN111916916 A CN 111916916A CN 202010659985 A CN202010659985 A CN 202010659985A CN 111916916 A CN111916916 A CN 111916916A
- Authority
- CN
- China
- Prior art keywords
- absorbing material
- carbon nanotube
- mixed solution
- dimensional network
- composite wave
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/15—Nano-sized carbon materials
- C01B32/158—Carbon nanotubes
- C01B32/168—After-treatment
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K9/00—Screening of apparatus or components against electric or magnetic fields
- H05K9/0073—Shielding materials
- H05K9/0081—Electromagnetic shielding materials, e.g. EMI, RFI shielding
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
- Carbon And Carbon Compounds (AREA)
Abstract
The invention provides a carbon nanotube-based three-dimensional network structure composite wave-absorbing material and a preparation method thereof, and the wave-absorbing material is characterized by consisting of carbon nanotubes and silicon dioxide, wherein the silicon dioxide is coated on the outer wall of the carbon nanotubes; step 2, ultrasonically dispersing the mixed solution obtained in the step 1; step 3, adjusting the pH value of the mixed solution obtained in the step 2 to 8-10 by using ammonia water; step 4, dropping ethyl orthosilicate into the mixed solution obtained in the step 3, and stirring by using a magnetic stirrer; step 5, respectively filtering the mixed solution obtained in the step 4 by using deionized water and absolute ethyl alcohol; and 6, putting the sample obtained in the step 5 into a drying oven, taking out and grinding the sample into powder to obtain the carbon nanotube-based three-dimensional network structure composite wave-absorbing material. The wave-absorbing material has the advantages of light weight, thin thickness, strong absorption property and the like.
Description
Technical Field
The invention relates to the technical field of structural material preparation, in particular to a carbon nanotube-based three-dimensional network structure composite wave-absorbing material and a preparation method thereof.
Background
It is well known that electromagnetic wave pollution of industrial and domestic electronic equipment, which is becoming increasingly serious, is attracting global attention because such pollution is harmful to human health and wildlife. More importantly, the survival of the dominant military forces in war is now critical to the overall battle field. Therefore, in any case, it is critical to design and manufacture an electromagnetic wave absorbing material having high absorption efficiency, wide bandwidth, low density, and good stability under extreme environments.
In recent years, carbon materials have attracted much attention due to their various advantages such as structural diversification and excellent physical and chemical properties. Various carbon materials (carbon black, carbon nanotubes, carbon fibers, graphene, etc.) have been used in aerospace, supercapacitor, and machine manufacturing applications. In addition, the field of electromagnetic wave absorption is also the key field of carbon materials for exerting the advantages of the carbon materials. Among them, carbon nanotubes, which are typical carbon materials, are one of the most widely studied electromagnetic wave absorbing materials due to their excellent specific surface area, low density, and good electrical conductivity absorption performance. Carbon nanotubes have many complimentary inherent properties, such as high specific surface area, low density, high conductivity, etc., and thus can be excellent electromagnetic wave absorbers. However, highly graphitized carbon nanotubes deteriorate impedance matching conditions and produce more electromagnetic wave reflection rather than absorption on the surface thereof. Therefore, the research of the high-efficiency carbon nano tube composite wave-absorbing material has important significance. In conclusion, it is considered that the carbon nanotube-based composite material with excellent impedance matching performance can be prepared by a proper method and can be widely applied to the field of wave absorption.
However, materials conventionally used for compounding with carbon nanotubes are mainly magnetic materials (Fe, Co, Ni, and compounds thereof). These materials have a relatively high density (typically 7-8 g/cm)3). The introduction of these high-density magnetic materials into carbon nanotubes can lead to a substantial increase in the overall density of the composite wave-absorbing material, and may lead to the material being susceptible to corrosion, oxidation or high-temperature failure, so that the advantages of low density, good stability and the like of the carbon nanotubes applied as the wave-absorbing material are no longer obvious, and the designed preparation method and raw materials are also limited. Therefore, it is urgently needed to develop a new preparation method of the non-magnetic wave-absorbing material based on the carbon nano tube to fill the gap.
Disclosure of Invention
The present invention is to solve the above-mentioned disadvantages of the prior art, and provides a method for introducing silicon dioxide (SiO) while maintaining high dielectric loss of carbon nanotubes2) So as to improve the impedance matching performance of the composite wave-absorbing material and ensure that the prepared three-dimensional reticular carbon nano tube composite material has good wave-absorbing performance.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the carbon nanotube-based three-dimensional network structure composite wave-absorbing material is characterized by comprising carbon nanotubes and silicon dioxide, wherein the silicon dioxide is coated on the outer walls of the carbon nanotubes, and the thickness of the silicon dioxide coating is 10-30 nm.
A preparation method of a carbon nanotube-based three-dimensional network structure composite wave-absorbing material is characterized by comprising the following steps:
and step 5, filtering: filtering the mixed solution obtained in the step 4 for 3-6 times by using deionized water and absolute ethyl alcohol respectively;
Preferably, in the step 1, the container is a glass container.
Preferably, in the step 2, the mixed solution is sealed with a plastic film to prevent the ethanol from volatilizing, thereby reducing the dispersion degree, while isolating the external air during the ultrasonic dispersion.
Preferably, in the step 3, ammonia water is used for adjusting the pH value to 9, and the outside air is isolated after the mixing is finished, so that the pH value is prevented from being influenced by the volatilization of the ammonia water.
Preferably, in the step 4, the tetraethoxysilane is dropped into the mixed solution obtained in the step 3, and is stirred for 3 hours by using a magnetic stirrer, wherein in the stirring process, the tetraethoxysilane is firstly stirred at a high speed, the tetraethoxysilane and the carbon nano tube are fully mixed, and then the stirring is carried out at a low speed, so that the formed silicon dioxide coating layer is coated uniformly.
Preferably, in the step 5, the mixture is filtered by deionized water and then filtered by absolute ethyl alcohol, so as to wash away inorganic substances and organic substances which may exist respectively. And the anhydrous ethanol has high volatilization speed and can be dried quickly.
Preferably, in the step 6, the sample obtained in the step 5 is placed in a drying oven and dried for 12 hours at the temperature of 60 ℃.
Preferably, the speed of the rapid stirring is 420-500 r/min, and the speed of the low-speed stirring is 80-120 r/min.
The scheme of the invention has the beneficial effects that: the preparation method of the non-magnetic composite wave-absorbing material with the three-dimensional network structure based on the carbon nano tube is adopted. The carbon nano tube is used as a substrate to ensure high dielectric loss of the composite material, and then the carbon nano tube is mixed with a certain amount of tetraethoxysilane so as to introduce SiO2I.e. the production of SiO by sol-gel process2And make SiO2And growing the coating layer. The obtained carbon nanotube-based three-dimensional network structure composite wave-absorbing material not only retains the excellent performance of the carbon nanotube, but also has good heat resistance and good heat resistance due to the SiO2The presence of (a) greatly improves its impedance matching. More importantly, the corrosion resistance, oxidation resistance and high-temperature stability of the material are ensured, and the harsh reaction conditions required by the high-temperature reaction of the prior method are avoided. The carbon nanotube-based composite wave-absorbing material prepared by the preparation method has the electromagnetic wave absorption capability which is enhanced by about 120 percent compared with that of a pure carbon nanotube, can be used as an excellent wave-absorbing material with light weight, thin thickness and strong absorption characteristics, and has the advantages of light weight, thin thickness, strong absorption characteristics and the like, so that the material can be used as a more practical wave-absorbing material.
Drawings
Fig. 1 shows XRD patterns of carbon nanotubes before and after SiO2 coating.
Fig. 2 shows a scanning electron micrograph of an original carbon nanotube not coated with SiO2, in which (a) is a low magnification diagram and (b) is a high magnification diagram.
Fig. 3 shows a scanning electron microscope atlas of the carbon nanotube composite wave-absorbing material coated with SiO2, wherein (a) is a low-power image and (b) is a high-power image.
Fig. 4 shows a transmission spectrum of the carbon nanotube composite wave-absorbing material coated by SiO2, wherein (a) is a transmission diagram and a selective area electron diffraction pattern diagram of the carbon nanotube coated by SiO2, (b) is a high-resolution transmission diagram of the carbon nanotube coated by SiO2, and (c) and (d) are an element distribution diagram and an element content diagram of the carbon nanotube composite wave-absorbing material coated by SiO2, respectively.
Fig. 5 shows impedance matching patterns of the carbon nanotubes before and after the SiO2 coating.
Fig. 6 shows reflection losses of the carbon nanotubes before and after coating with SiO2, where (a) is a reflection loss graph of the carbon nanotubes without SiO2 coating at different thicknesses, and (b) is a reflection loss graph of the carbon nanotubes coated with SiO2 at different thicknesses.
Detailed Description
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawing, the carbon nanotube-based three-dimensional network structure composite wave-absorbing material is characterized in that the adsorbing material is composed of carbon nanotubes and silicon dioxide, the silicon dioxide is coated on the outer walls of the carbon nanotubes, and the thickness of the silicon dioxide coating is 10-30 nm.
A preparation method of a carbon nanotube-based three-dimensional network structure composite wave-absorbing material is characterized by comprising the following steps:
and step 5, filtering: filtering the mixed solution obtained in the step 4 for 3-6 times by using deionized water and absolute ethyl alcohol respectively;
Preferably, in the step 1, the container is a glass container.
Preferably, in the step 2, the mixed solution is sealed with a plastic film to prevent the ethanol from volatilizing, thereby reducing the dispersion degree, while isolating the external air during the ultrasonic dispersion.
Preferably, in the step 3, ammonia water is used for adjusting the pH value to 9, and the outside air is isolated after the mixing is finished, so that the pH value is prevented from being influenced by the volatilization of the ammonia water.
Preferably, in the step 4, the tetraethoxysilane is dropped into the mixed solution obtained in the step 3, and is stirred for 3 hours by using a magnetic stirrer, wherein in the stirring process, the tetraethoxysilane is firstly stirred at a high speed, the tetraethoxysilane and the carbon nano tube are fully mixed, and then the stirring is carried out at a low speed, so that the formed silicon dioxide coating layer is coated uniformly.
Preferably, in the step 5, the mixture is filtered by deionized water and then filtered by absolute ethyl alcohol, so as to wash away inorganic substances and organic substances which may exist respectively. And the anhydrous ethanol has high volatilization speed and can be dried quickly.
Preferably, in the step 6, the sample obtained in the step 5 is placed in a drying oven and dried for 12 hours at the temperature of 60 ℃.
Preferably, the speed of the rapid stirring is 420-500 r/min, and the speed of the low-speed stirring is 80-120 r/min.
The process for introducing the carbon source into the tetraethoxysilane comprises the following steps:
the product according to the scheme is contrastively analyzed with the prior art, and the performance of the product according to the scheme is as follows:
as shown in FIG. 1: FIG. 1 shows XRD patterns of carbon nanotubes before and after SiO2 coating, wherein Sample A is the XRD pattern of the original carbon nanotube which is not coated by SiO2, and Sample B is the XRD pattern of the carbon nanotube composite wave-absorbing material coated by SiO 2;
according to the ratio shown in FIG. 1Compared with Sample A and Sample B, the SiO is the cause2The existence of the coating layer weakens the XRD diffraction peak of the carbon nano tube, and reflects the success of SiO2 coating from one side surface.
As shown in fig. 2: fig. 2 shows a scanning electron micrograph of an original carbon nanotube not coated with SiO2, in which (a) is a low magnification diagram and (b) is a high magnification diagram. The carbon nano tube without the SiO2 coating is exposed and relatively smooth;
as shown in fig. 3: fig. 3 shows a scanning electron microscope atlas of the carbon nanotube composite wave-absorbing material coated with SiO2, wherein (a) is a low-power image and (b) is a high-power image.
It can be seen from the comparison between fig. 2 and fig. 3 that the SiO 2-coated carbon nanotubes form aggregates on the surface, which are relatively rough, and thus may generate more interface loss, thereby improving the wave-absorbing performance.
As shown in fig. 4: fig. 4 shows a transmission spectrum of a carbon nanotube composite wave-absorbing material coated with SiO2, where (a) is a transmission diagram and a selective area electron diffraction pattern diagram of a carbon nanotube coated with SiO2, (b) is a high-resolution transmission diagram of a carbon nanotube coated with SiO2, and (C) and (d) are element distribution and element content diagrams of a carbon nanotube composite wave-absorbing material coated with SiO2, respectively, and it is apparent from (a) that a layer of coating is on the surface of the carbon nanotube and the coating layer is amorphous, and from (b) it can be seen that the thickness of the coating layer is 17.98-18.23 nm, and from (C) and (d) that elements forming the composite are C, O, and Si, and the content of each element is shown in (d), it can be determined that the method can coat a layer of SiO2 on the surface of the carbon nanotube.
As shown in fig. 5: FIG. 5 shows the impedance matching patterns of carbon nanotubes before and after coating with SiO2, where Sample A is the impedance matching pattern of the original carbon nanotube which is not coated with SiO2, Sample B is the impedance matching pattern of the carbon nanotube composite wave-absorbing material coated with SiO2,
it can be seen that the impedance matching value of Sample B is far better than that of Sample A, the impedance matching performance and the wave-absorbing performance are in positive correlation, and 1 is the optimal impedance matching, so that the impedance matching value of the product reaches 0.99 at 14GHz, and is basically the optimal value.
As shown in fig. 6: FIG. 6 shows reflection losses of carbon nanotubes with different thicknesses before and after coating with SiO2, where (a) is a reflection loss graph of carbon nanotubes without coating with SiO2 and (b) is a reflection loss graph of carbon nanotubes with different thicknesses after coating with SiO2
The reflection loss of the carbon nano tube coated with Si02 can be seen to be far less than-10 dB (the reflection loss can be practically applied only when the reflection loss reaches-10 dB), the reflection loss of the carbon nano tube coated with Si02 can be seen to be as high as-54.076 dB (the reflection loss reaches 99.999 percent of the electromagnetic wave absorption rate) under the thickness of 1.08mm, compared with the carbon nano tube which is not coated, the wave absorbing performance is improved by about 120 percent, and therefore, the product obtained by the scheme has better wave absorbing performance.
In addition, the prior art also adopts the prior art of directly combining silicon dioxide and carbon nano tubes with composite materials, but in the prior art, silicon dioxide crystals are directly mixed with the carbon nano tubes, and different from the patent that tetraethoxysilane is adopted as a silicon source to generate SiO2, the direct adoption of silicon dioxide has to be subjected to steps of rolling, high temperature and the like, and the processing cost is higher. The composite material of the carbon nano tube coated by SiO2 can be generated at normal temperature and normal pressure by adopting tetraethoxysilane as a silicon source.
The loading amount and the temperature of the carbon nano tube of the composite material adopting the direct mixing of the silicon dioxide crystal and the carbon nano tube have great influence on the performance of the composite material, and under the manufacturing condition of 100 ℃ and 500 ℃, the reflection loss is only less than-7 dB when the carbon nano tube is loaded to 2 wt% (under the normal-temperature manufacturing condition, when the carbon nano tube is loaded to 0.4-0.6 wt%, the reflection loss exceeds-10 dB under any thickness of 1-5.5 mm). When the carbon nano tube load reaches 5 wt.%, the reflection loss is greatly improved.
In addition, in this patent, compare between the performance of coating structure and the material of mixed silica, the coating structure mainly uses carbon nanotube as the base, can give full play to carbon nanotube's excellent performance, and use SiO2 microballon as the base among the prior art, carbon nanotube's load capacity is only 2~10%, SiO 2's content can cause the density of combined material to increase (SiO2 density is 2.2g/cm year, carbon nanotube density is 1.3~ 2g/cm year), be unfavorable for absorbing the practical application of material.
The scheme of the invention has the beneficial effect of adopting the preparation method of the carbon nanotube-based three-dimensional network structure composite wave-absorbing material. The carbon nano tube is used as a substrate to ensure the high dielectric loss and the high electromagnetic wave absorption performance of the composite material, and then the carbon nano tube is mixed with a certain amount of tetraethoxysilane to introduce SiO2I.e. the production of SiO by sol-gel process2And make SiO2And growing the coating layer. The obtained non-magnetic composite wave-absorbing material with the three-dimensional network structure based on the carbon nano tube not only keeps the excellent performance of the carbon nano tube, but also has the advantages of good performance and low cost due to the SiO2The presence of (a) greatly improves its impedance matching. More importantly, the corrosion resistance, oxidation resistance and high-temperature stability of the material are ensured, and the harsh reaction conditions required by the high-temperature reaction of the prior method are avoided. These advantages make the material a more practical wave-absorbing material.
Claims (9)
1. The carbon nanotube-based three-dimensional network structure composite wave-absorbing material is characterized by comprising carbon nanotubes and silicon dioxide, wherein the silicon dioxide is coated on the outer walls of the carbon nanotubes, and the thickness of the silicon dioxide coating is 10-30 nm.
2. A preparation method of a carbon nanotube-based three-dimensional network structure composite wave-absorbing material is characterized by comprising the following steps:
step 1, mixing materials: mixing absolute ethyl alcohol and deionized water to obtain a mixed solution, wherein the mass percent of the absolute ethyl alcohol is 40-50% of that of the deionized water, putting the mixed solution of the absolute ethyl alcohol and the deionized water into a container, and adding carbon nano tubes into the mixed solution, wherein the mass percent of the carbon nano tubes is 0.4-0.6% of that of the mixed solution;
step 2, dispersing: ultrasonically dispersing the mixed solution containing the carbon nano tubes obtained in the step 1 for 2-4 h;
step 3, pH value blending: adjusting the pH value of the mixed solution obtained in the step 2 to 8-10 by using ammonia water;
step 4, coating: dropping ethyl orthosilicate into the mixed solution obtained in the step 3, and stirring by using a magnetic stirrer, wherein the mass percent of the ethyl orthosilicate is 0.8-1% of the mixed solution obtained in the step 3;
and step 5, filtering: filtering the mixed solution obtained in the step 4 for 3-6 times by using deionized water and absolute ethyl alcohol respectively;
step 6, drying and grinding: and (4) putting the sample obtained in the step (5) into a drying oven, drying for 12-14 h at the temperature of 60 ℃, taking out, and grinding into powder to obtain the carbon nanotube-based three-dimensional network structure composite wave-absorbing material.
3. The method for preparing the carbon nanotube-based three-dimensional network structure composite wave-absorbing material as claimed in claim 2, wherein in the step 1, the container is a glass container.
4. The method for preparing the composite wave-absorbing material with the carbon nanotube-based three-dimensional network structure as claimed in claim 2, wherein in the step 2, the mixed solution is sealed by a plastic film while being isolated from the outside air in the ultrasonic dispersion process.
5. The method for preparing the carbon nanotube-based three-dimensional network structure composite wave-absorbing material as claimed in claim 2, wherein in the step 3, ammonia water is used for adjusting the pH value to 9, and external air is isolated after mixing.
6. The method for preparing the carbon nanotube-based three-dimensional network structure composite wave-absorbing material as claimed in claim 2, wherein in the step 4, tetraethoxysilane is dropped into the mixed solution obtained in the step 3, and is stirred for 3 hours by a magnetic stirrer, wherein in the stirring process, the tetraethoxysilane and the carbon nanotube are firstly stirred rapidly, and are fully mixed, and then are stirred slowly, so that the formed silicon dioxide coating layer is coated uniformly.
7. The method for preparing the carbon nanotube-based three-dimensional network structure composite wave-absorbing material as claimed in claim 2, wherein in the step 5, the carbon nanotube-based three-dimensional network structure composite wave-absorbing material is filtered by deionized water and then filtered by absolute ethyl alcohol.
8. The method for preparing the carbon nanotube-based three-dimensional network structure composite wave-absorbing material as claimed in claim 2, wherein the sample obtained in the step 5 is placed in a drying oven and dried for 12 hours at 60 ℃.
9. The method for preparing a carbon nanotube-based three-dimensional network composite wave-absorbing material as claimed in claim 6, wherein the rapid stirring speed is 420-500 r/min, and the low-speed stirring speed is 80-120 r/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659985.4A CN111916916B (en) | 2020-07-10 | 2020-07-10 | Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010659985.4A CN111916916B (en) | 2020-07-10 | 2020-07-10 | Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111916916A true CN111916916A (en) | 2020-11-10 |
| CN111916916B CN111916916B (en) | 2022-07-29 |
Family
ID=73226827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010659985.4A Active CN111916916B (en) | 2020-07-10 | 2020-07-10 | Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111916916B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939083A (en) * | 2021-02-07 | 2021-06-11 | 哈尔滨工业大学（威海） | Molybdenum disulfide/ferroferric oxide/graphene nanosheet composite wave absorber and preparation method thereof |
| CN113248779A (en) * | 2021-04-26 | 2021-08-13 | 青岛歌尔微电子研究院有限公司 | Composite material and preparation method thereof |
| CN113708086A (en) * | 2021-08-31 | 2021-11-26 | 河北科技大学 | Transition metal nano powder/carbon nano tube composite material and preparation method and application thereof |
| CN115304952A (en) * | 2022-07-11 | 2022-11-08 | 金三江(肇庆)硅材料股份有限公司 | Preparation method of silica matting agent with stealth function, low oil absorption value and high specific surface |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514684A (en) * | 2003-06-27 | 2004-07-21 | 中国科学院上海硅酸盐研究所 | Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method |
| CN1994876A (en) * | 2006-12-22 | 2007-07-11 | 中国科学院上海硅酸盐研究所 | Preparation method of nano silica dioxide granule enveloping carbon nanotube composite powder |
| CN101318644A (en) * | 2008-07-01 | 2008-12-10 | 上海大学 | Novel method for coating carbon nano-tube with silicon dioxide |
| US20100081130A1 (en) * | 2005-09-08 | 2010-04-01 | Jin-Kyu Lee | Multifunctional particles providing cellular uptake and magnetic motor effect |
| CN102924874A (en) * | 2012-11-01 | 2013-02-13 | 南昌航空大学 | Preparation method of strontium ferrite-SiO2/carbon nanotube/hydrogenated bisphenol A epoxy resin composite wave-absorbing material |
| CN107163500A (en) * | 2017-07-18 | 2017-09-15 | 陈剑桃 | A kind of composite wave-suction material of multi-layer hollow structure |
| US20180297849A1 (en) * | 2015-10-26 | 2018-10-18 | Sabic Global Technologies B.V. | Preparation of carbon nanotube shell materials |
| CN110655061A (en) * | 2019-09-29 | 2020-01-07 | 安徽理工大学 | Multi-walled carbon nanotube/oxide nano hybrid wave-absorbing material and preparation method thereof |
| CN113574701A (en) * | 2018-10-29 | 2021-10-29 | 株式会社Lg新能源 | Anode active material and lithium secondary battery including the same |
-
2020
- 2020-07-10 CN CN202010659985.4A patent/CN111916916B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1514684A (en) * | 2003-06-27 | 2004-07-21 | 中国科学院上海硅酸盐研究所 | Carbon nano-pipe/ceramic composite material possessing microwave absorption function and its preparation method |
| US20100081130A1 (en) * | 2005-09-08 | 2010-04-01 | Jin-Kyu Lee | Multifunctional particles providing cellular uptake and magnetic motor effect |
| US20120156686A1 (en) * | 2005-09-08 | 2012-06-21 | Jin-Kyu Lee | Multifunctional particles providing cellular uptake and magnetic motor effect |
| CN1994876A (en) * | 2006-12-22 | 2007-07-11 | 中国科学院上海硅酸盐研究所 | Preparation method of nano silica dioxide granule enveloping carbon nanotube composite powder |
| CN101318644A (en) * | 2008-07-01 | 2008-12-10 | 上海大学 | Novel method for coating carbon nano-tube with silicon dioxide |
| CN102924874A (en) * | 2012-11-01 | 2013-02-13 | 南昌航空大学 | Preparation method of strontium ferrite-SiO2/carbon nanotube/hydrogenated bisphenol A epoxy resin composite wave-absorbing material |
| US20180297849A1 (en) * | 2015-10-26 | 2018-10-18 | Sabic Global Technologies B.V. | Preparation of carbon nanotube shell materials |
| CN107163500A (en) * | 2017-07-18 | 2017-09-15 | 陈剑桃 | A kind of composite wave-suction material of multi-layer hollow structure |
| CN113574701A (en) * | 2018-10-29 | 2021-10-29 | 株式会社Lg新能源 | Anode active material and lithium secondary battery including the same |
| CN110655061A (en) * | 2019-09-29 | 2020-01-07 | 安徽理工大学 | Multi-walled carbon nanotube/oxide nano hybrid wave-absorbing material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 郭唐华: "氨基化二氧化硅包覆碳纳米管增强环氧树脂复合材料", 《材料科学与工程学报》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112939083A (en) * | 2021-02-07 | 2021-06-11 | 哈尔滨工业大学（威海） | Molybdenum disulfide/ferroferric oxide/graphene nanosheet composite wave absorber and preparation method thereof |
| CN113248779A (en) * | 2021-04-26 | 2021-08-13 | 青岛歌尔微电子研究院有限公司 | Composite material and preparation method thereof |
| CN113708086A (en) * | 2021-08-31 | 2021-11-26 | 河北科技大学 | Transition metal nano powder/carbon nano tube composite material and preparation method and application thereof |
| CN113708086B (en) * | 2021-08-31 | 2023-12-22 | 河北科技大学 | Transition metal nano powder/carbon nano tube composite material and preparation method and application thereof |
| CN115304952A (en) * | 2022-07-11 | 2022-11-08 | 金三江(肇庆)硅材料股份有限公司 | Preparation method of silica matting agent with stealth function, low oil absorption value and high specific surface |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111916916B (en) | 2022-07-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111916916B (en) | Carbon nanotube-based three-dimensional network structure composite wave-absorbing material and preparation method thereof | |
| Cai et al. | Etching engineering and electrostatic self-assembly of N-doped MXene/hollow Co-ZIF hybrids for high-performance microwave absorbers | |
| Meng et al. | Three-dimensional (Fe3O4/ZnO)@ C Double-core@ shell porous nanocomposites with enhanced broadband microwave absorption | |
| Wen et al. | Controllable adjustment of cavity of core-shelled Co3O4@ NiCo2O4 composites via facile etching and deposition for electromagnetic wave absorption | |
| Zhao et al. | Facile synthesis of novel heterostructure based on SnO2 nanorods grown on submicron Ni walnut with tunable electromagnetic wave absorption capabilities | |
| Cheng et al. | Rationally regulating complex dielectric parameters of mesoporous carbon hollow spheres to carry out efficient microwave absorption | |
| Yang et al. | Rational construction of graphene oxide with MOF-derived porous NiFe@ C nanocubes for high-performance microwave attenuation | |
| Cui et al. | Synthesis of CuS nanoparticles decorated Ti3C2Tx MXene with enhanced microwave absorption performance | |
| Yang et al. | Strong absorption and wide-frequency microwave absorption properties of the nanostructure zinc oxide/zinc/carbon fiber multilayer composites | |
| Chang et al. | Sodium oxalate-induced hydrothermal synthesis of wood-texture-column-like NiCo2O4 with broad bandwidth electromagnetic wave absorption performance | |
| US20080050573A1 (en) | Silicon Nanosheet , Nanosheet Solution and Process for Producing the Same, Nanosheet -Containing Composite, and Nanosheet Aggregate | |
| Zhai et al. | 1D/2D CoTe2@ MoS2 composites constructed by CoTe2 nanorods and MoS2 nanosheets for efficient electromagnetic wave absorption | |
| Li et al. | Interface evolution of a C/ZnO absorption agent annealed at elevated temperature for tunable electromagnetic properties | |
| Sun et al. | In-situ growth strategy to fabrication of MWCNTs/Fe3O4 with controllable interface polarization intensity and wide band electromagnetic absorption performance | |
| Shen et al. | Space-confined fabrication of hydrophobic magnetic carbon nanofibers for lightweight and enhanced microwave absorption | |
| Tan et al. | A low-cost lightweight microwave absorber: silicon carbide synthesized from tissue | |
| Chen et al. | Large-scale and low-cost synthesis of in situ generated SiC/C nano-composites from rice husks for advanced electromagnetic wave absorption applications | |
| Li et al. | Ultralight carbon-based Co (OH) 2-Co3O4/nanocomposite with superior performance in wave absorption | |
| Zhang et al. | Lightweight porous NiCo-SiC aerogel with synergistically dielectric and magnetic losses to enhance electromagnetic wave absorption performances | |
| CN113831894A (en) | Ferrite graphene composite material and preparation method thereof | |
| Xu et al. | Hollow porous Ni@ SiC nanospheres for enhancing electromagnetic wave absorption | |
| You et al. | Fabrication of high-performance electromagnetic wave absorbing SiC composites reinforced by 3D printed carbon-based nanonetwork with Fe3O4 nanoparticles | |
| Yuan et al. | Boron nitride nanosheets decorated N-doped carbon nanofibers as a wide-band and lightweight electromagnetic wave absorber | |
| Wen et al. | The hierarchical three-dimensional cobalt superstructure: controllable synthesis, electromagnetic properties and microwave absorption | |
| Wei et al. | Optimization of Ti with modified SiC ceramics for electromagnetic absorption properties |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |