CN113023723B - Electromagnetic wave-absorbing material prepared from shaddock peel and preparation method thereof - Google Patents
Electromagnetic wave-absorbing material prepared from shaddock peel and preparation method thereof Download PDFInfo
- Publication number
- CN113023723B CN113023723B CN202110153806.4A CN202110153806A CN113023723B CN 113023723 B CN113023723 B CN 113023723B CN 202110153806 A CN202110153806 A CN 202110153806A CN 113023723 B CN113023723 B CN 113023723B
- Authority
- CN
- China
- Prior art keywords
- electromagnetic wave
- absorbing material
- carbon
- shaddock peel
- skeleton
- 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.)
- Active
Links
- 239000011358 absorbing material Substances 0.000 title claims abstract description 24
- 235000001759 Citrus maxima Nutrition 0.000 title claims abstract description 23
- 244000276331 Citrus maxima Species 0.000 title claims abstract description 23
- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 239000003575 carbonaceous material Substances 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 11
- 230000008569 process Effects 0.000 claims abstract description 8
- 239000011148 porous material Substances 0.000 claims abstract description 3
- 238000004108 freeze drying Methods 0.000 claims description 11
- 239000002243 precursor Substances 0.000 claims description 9
- 238000001354 calcination Methods 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004964 aerogel Substances 0.000 claims description 4
- 238000000137 annealing Methods 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000007710 freezing Methods 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 3
- 239000012300 argon atmosphere Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 12
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 238000009413 insulation Methods 0.000 abstract description 6
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000001069 Raman spectroscopy Methods 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001931 thermography Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005274 electronic transitions Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 238000005087 graphitization Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 239000002086 nanomaterial Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001757 thermogravimetry curve Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C01B32/20—Graphite
- C01B32/205—Preparation
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention discloses an electromagnetic wave-absorbing material prepared from shaddock peel, wherein the electromagnetic wave-absorbing material is internally provided with a three-dimensional conducting pore structure, the skeleton of the electromagnetic wave-absorbing material is a graphitized carbon-based skeleton, and the carbon-based skeleton is also provided with a mesoporous structure. The invention also discloses a preparation method of the electromagnetic wave-absorbing material. The electromagnetic wave-absorbing material prepared from the shaddock peel has a three-dimensional network porous structure on the macro-scale and a mesoporous structure on the micro-scale, so that the weight of the material is reduced, and the heat insulation capacity of the material is improved; meanwhile, the graphitized carbon-based material has good conductivity, so that the graphitized carbon-based material has good dielectric loss capacity, can enhance the absorption loss of electromagnetic waves, and further effectively improves the absorption and attenuation capacity of the graphitized carbon-based material to the electromagnetic waves; the carbon-based material prepared by the method has the advantages of low density, large specific surface area and good dielectric loss, and meanwhile, the preparation method has simple process, does not need to use any chemical reagent, has low cost and can realize large-scale mass production.
Description
Technical Field
The invention relates to an electromagnetic wave-absorbing material prepared from shaddock peel, and also relates to a preparation method of the electromagnetic wave-absorbing material.
Background
Modern communication, broadcasting, television, navigation, remote sensing and telemetering, industrial automation, household appliances, geological exploration, power systems, medical electronic equipment and the like are rapidly developed, and the electromagnetic wave pollution problem caused by the rapid development is continuously aggravated, so that the problem of reducing electromagnetic interference is unprecedented. Electromagnetic shielding and wave absorbing materials are used as key materials for protecting human beings and precision equipment, and not only occupy important strategic positions in the military field, but also draw a great deal of attention in the civil field. In view of the severity of electromagnetic microwave contamination problems and the complexity of the environment in which the material is used, it has become necessary to integrate multiple functions into one material. Electromagnetic wave absorbing materials with multiple functions are very attractive for next generation wireless technology and portable electronic devices.
Disclosure of Invention
The invention aims to: aiming at the problem of complexity of application environment of the electromagnetic wave-absorbing material in the prior art, the invention provides the electromagnetic wave-absorbing material prepared from the shaddock peel, which not only has electromagnetic wave-absorbing performance, but also has heat insulation and infrared stealth functions; the invention also provides a preparation method of the electromagnetic wave-absorbing material prepared from the shaddock peel, and the method can prepare the carbon-based material with the shaddock peel intrinsic complete three-dimensional network structure.
The technical scheme is as follows: the electromagnetic wave-absorbing material prepared from the shaddock peel has a three-dimensional conducting pore structure, the skeleton of the electromagnetic wave-absorbing material is a graphitized carbon-based skeleton, and the carbon-based skeleton is also provided with a mesoporous structure.
The preparation method of the electromagnetic wave-absorbing material prepared from the shaddock peel specifically comprises the following steps: putting the peeled shaddock peel into a freeze dryer for freeze drying treatment to obtain a precursor; and then placing the precursor subjected to freeze drying treatment in an inert atmosphere for high-temperature annealing and calcining to obtain the shaddock peel-derived electromagnetic wave absorbing material. The precursor after freeze drying treatment can keep the original micro-nano structure of biomass from being damaged under high temperature treatment.
In the step (1), the peeling time of the shaddock peel is not more than 10 minutes.
In the step (1), the pre-freezing time is not less than 6 hours in the freeze drying process.
In the step (1), the drying time is not less than 48 hours in the freeze drying process.
Wherein, in the step (1), the vacuum degree is at least 0.001Pa in the freeze drying process.
In the step (2), the calcining temperature is not lower than 800 ℃, the heating rate is not lower than 2 ℃/min, and the calcining time is not lower than 2h; the carbon-based material with the aerogel structure is obtained after calcination, and the carbon-based material has dielectric loss capability. The precursor subjected to freeze drying treatment can realize that the carbon-based skeleton with the three-dimensional porous network structure is free from microstructure fracture and macroscopic porous structure collapse under high-temperature treatment.
The beneficial effects are that: the electromagnetic wave-absorbing material prepared from the shaddock peel has a three-dimensional network porous structure in a macroscopic view and a large number of mesoporous structures in a microscopic view, so that the weight of the material is reduced, and the heat insulation capability of the material is improved; meanwhile, the graphitized carbon-based material has good conductivity, so that the graphitized carbon-based material has good dielectric loss capacity, can enhance the absorption loss of electromagnetic waves, and further effectively improves the absorption and attenuation capacity of the graphitized carbon-based material to the electromagnetic waves; the carbon-based material prepared by the method has the advantages of low density, large specific surface area and good dielectric loss, and meanwhile, the preparation method has simple process, does not need to use any chemical reagent, has low cost and can realize large-scale mass production.
Drawings
FIG. 1 is an X-ray diffraction pattern of the carbon-based material prepared in example 1;
FIG. 2 is a Raman diagram of the carbon-based material prepared in example 1;
FIG. 3 is an SEM photograph of the precursor prepared in example 1;
FIG. 4 is an SEM photograph of a carbon-based material prepared according to example 1;
FIG. 5 is an infrared thermogram of the carbon-based material prepared in example 1;
FIG. 6 is a graph showing the reflection loss of the carbon-based material produced in example 1.
Detailed Description
The technical scheme of the invention is further described below with reference to the attached drawings and specific embodiments.
Example 1
The invention discloses a preparation method of an electromagnetic wave-absorbing material prepared from shaddock peel, which specifically comprises the following steps:
(1) Cleaning the whole outer surface of the shaddock with deionized water, lightly wiping the outer surface with a chipless paper towel, and peeling off the shaddock; then placing the peeled fresh shaddock peel not more than 10 minutes into a freeze dryer, performing freeze drying treatment according to a preset 6h pre-freezing time and a 48h drying time, ensuring the vacuum degree in the freeze drying process to be 0.001Pa, and finally obtaining a precursor product derived from the fresh shaddock peel, and marking the precursor product as P800;
and 2, placing the product obtained in the step 1 in an argon atmosphere for high-temperature annealing calcination, heating to 800 ℃ according to a heating rate of 2 ℃/min, and preserving heat for 2 hours to obtain the carbon-based material with the aerogel structure, and recording as G800.
FIG. 1 is an X-ray diffraction pattern of the carbon-based material prepared in example 1. As can be seen from FIG. 1, diffraction peaks of 24.5 DEG and 43.4 DEG carbon of the product prepared in example 1 are apparent, showing (002) plane and (100) plane of graphitized carbon, respectively.
FIG. 2 is a Raman diagram of the carbon-based material obtained in example 1, and it can be seen from FIG. 2 that the product obtained in example 1 is I D /I G A value of 1.00 indicates that the carbon-based material has a certain degree of graphitization.
Fig. 3 is an SEM photograph of the precursor P800 prepared in example 1, and it can be seen from fig. 3 that the uncalcined sample has a three-dimensional network porous structure, maintains the intrinsic structural characteristics of the shaddock peel and is advantageous for improving the light-weight characteristics thereof.
Fig. 4 is an SEM photograph of the carbon-based material G800 prepared in example 1, and it can be seen from fig. 4 that, after calcining at 800 ℃, the three-dimensional porous network structure of the sample has a certain shrinkage in size, and the network nodes and the surface of the carbon-based skeleton generate some mesoporous structures to make the surface of the network nodes and the surface of the carbon-based skeleton obviously rougher, which is beneficial to further improving the light weight and heat insulation properties of the material, and providing more polarization relaxation space to facilitate electromagnetic loss.
Fig. 5 is an ir thermal imaging diagram of the carbon-based material G800 prepared in example 1, and it can be seen from fig. 5 that when the temperature of the heating platform is set to 70 ℃, the ir thermal imaging diagram of the sample is collected at 3min, and the detection temperature of the carbon-based material G800 is 35.3 ℃ respectively, which is similar to the surrounding cold environment temperature, which indicates that the carbon-based material G800 has good heat insulation performance and excellent thermal infrared stealth performance, and the prepared carbon-based material G800 can be used for preparing heat insulation materials and thermal infrared stealth materials in practical applications.
Fig. 6 is a graph showing the reflection loss of the carbon-based material G800 prepared in example 1, in which the reflection loss curve is continuously shifted to a low frequency with an increase in thickness due to the dispersion effect. When the filling ratio of the sample to the paraffin is 1:4, the aerogel G800 shows excellent electromagnetic wave absorbing performance in the range of 2-18 GHz, when the matching thickness is 1.7mm, the reflection loss is-14.88 dB, and the maximum effective absorption frequency bandwidth can reach 5.80GHz; when the matching thickness is 2.3mm, the effective absorption bandwidth is 2.44GHz, and the maximum reflection loss can reach-29.50 dB.
The carbon-based material has a plurality of mesoporous structures on a microcosmic scale and a three-dimensional communicated network structure on a macroscopic scale, the structure effectively provides a transmission path for electronic transition and migration, and graphitized carbon can improve the conductivity of the material, so that the absorption and loss of electromagnetic waves are realized; meanwhile, the porous structure is favorable for the exertion of the heat insulation performance of the material and the demonstration of the thermal infrared stealth performance of the material.
Claims (1)
1. An electromagnetic wave-absorbing material prepared from shaddock peel is characterized in that: the electromagnetic wave absorbing material is internally provided with a three-dimensional conducting pore structure, the skeleton of the electromagnetic wave absorbing material is a graphitized carbon-based skeleton, and the carbon-based skeleton is also provided with a mesoporous structure;
the preparation method of the electromagnetic wave-absorbing material specifically comprises the following steps:
(1) Placing the peeled fresh shaddock peel not more than 10 minutes into a freeze dryer, performing freeze drying treatment according to a preset 6h pre-freezing time and a 48h drying time, ensuring the vacuum degree in the freeze drying process to be 0.001Pa, and finally obtaining a precursor product derived from the fresh shaddock peel;
(2) The product obtained in the step (1) is placed in argon atmosphere for high-temperature annealing calcination, and the process is carried out according to the formula 2 o Heating up to 800 at a heating rate of C/min o And C, preserving heat for 2 hours to obtain the carbon-based material with the aerogel structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153806.4A CN113023723B (en) | 2021-02-04 | 2021-02-04 | Electromagnetic wave-absorbing material prepared from shaddock peel and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110153806.4A CN113023723B (en) | 2021-02-04 | 2021-02-04 | Electromagnetic wave-absorbing material prepared from shaddock peel and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113023723A CN113023723A (en) | 2021-06-25 |
| CN113023723B true CN113023723B (en) | 2023-12-01 |
Family
ID=76459928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110153806.4A Active CN113023723B (en) | 2021-02-04 | 2021-02-04 | Electromagnetic wave-absorbing material prepared from shaddock peel and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113023723B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114656281B (en) * | 2022-04-24 | 2023-04-28 | 南京航空航天大学 | Preparation method of carbonized cotton cellulose aerogel electromagnetic wave-absorbing material |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004096099A (en) * | 2002-07-03 | 2004-03-25 | Nitta Ind Corp | Electromagnetic wave absorber and electromagnetic wave absorbing complex |
| CN107159111A (en) * | 2017-05-25 | 2017-09-15 | 江苏大学 | A kind of preparation method and applications of hydrophobic low-density pomelo peel carbon aerogels |
| WO2018014659A1 (en) * | 2016-07-22 | 2018-01-25 | 中国石油化工股份有限公司 | Carbon-based porous material, preparation method therefor and use thereof |
| CN107652946A (en) * | 2017-08-24 | 2018-02-02 | 江苏大学 | A kind of preparation method and applications of light porous absorbing material |
| CN107902652A (en) * | 2017-11-22 | 2018-04-13 | 汪远昊 | A kind of preparation method of pomelo peel foamy carbon for air purification |
| JP2018093078A (en) * | 2016-12-05 | 2018-06-14 | 日立化成株式会社 | EMI shielding composition, shielding material and method for producing shielding material |
| CN108521754A (en) * | 2018-04-11 | 2018-09-11 | 南京航空航天大学 | Porous carbon-based electromagnetic wave absorption agent of one kind and preparation method thereof |
| WO2018188419A1 (en) * | 2017-04-14 | 2018-10-18 | 杭州高烯科技有限公司 | Preparation method for use with graphene-based porous carbon network |
| CN109626354A (en) * | 2019-01-31 | 2019-04-16 | 沈阳工业大学 | Charcoal absorbing material based on pomelo peel and preparation method thereof |
| WO2019160541A1 (en) * | 2018-02-14 | 2019-08-22 | United States Of America As Represented By The Secretary Of Agriculture | Lignin-based carbon foams and composites and related methods |
| CN111747747A (en) * | 2020-07-17 | 2020-10-09 | 重庆大学 | Preparation method, product and application of carbon-based material with bionic fractal structure based on shaddock peel |
-
2021
- 2021-02-04 CN CN202110153806.4A patent/CN113023723B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004096099A (en) * | 2002-07-03 | 2004-03-25 | Nitta Ind Corp | Electromagnetic wave absorber and electromagnetic wave absorbing complex |
| WO2018014659A1 (en) * | 2016-07-22 | 2018-01-25 | 中国石油化工股份有限公司 | Carbon-based porous material, preparation method therefor and use thereof |
| JP2018093078A (en) * | 2016-12-05 | 2018-06-14 | 日立化成株式会社 | EMI shielding composition, shielding material and method for producing shielding material |
| WO2018188419A1 (en) * | 2017-04-14 | 2018-10-18 | 杭州高烯科技有限公司 | Preparation method for use with graphene-based porous carbon network |
| CN107159111A (en) * | 2017-05-25 | 2017-09-15 | 江苏大学 | A kind of preparation method and applications of hydrophobic low-density pomelo peel carbon aerogels |
| CN107652946A (en) * | 2017-08-24 | 2018-02-02 | 江苏大学 | A kind of preparation method and applications of light porous absorbing material |
| CN107902652A (en) * | 2017-11-22 | 2018-04-13 | 汪远昊 | A kind of preparation method of pomelo peel foamy carbon for air purification |
| WO2019160541A1 (en) * | 2018-02-14 | 2019-08-22 | United States Of America As Represented By The Secretary Of Agriculture | Lignin-based carbon foams and composites and related methods |
| CN108521754A (en) * | 2018-04-11 | 2018-09-11 | 南京航空航天大学 | Porous carbon-based electromagnetic wave absorption agent of one kind and preparation method thereof |
| CN109626354A (en) * | 2019-01-31 | 2019-04-16 | 沈阳工业大学 | Charcoal absorbing material based on pomelo peel and preparation method thereof |
| CN111747747A (en) * | 2020-07-17 | 2020-10-09 | 重庆大学 | Preparation method, product and application of carbon-based material with bionic fractal structure based on shaddock peel |
Non-Patent Citations (2)
| Title |
|---|
| Environmentally friendly and multifunctional shaddock peel-based carbon aerogel for thermal-insulation and microwave absorption;Weihua Gu等;Nano-Micro Letters(第第13期期);第102页 * |
| 柚子皮基多孔碳的制备及电化学性能;马英英等;电池;第50卷(第3期);第206-210页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113023723A (en) | 2021-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wu et al. | Carbon nanocoils/carbon foam as the dynamically frequency‐tunable microwave absorbers with an ultrawide tuning range and absorption bandwidth | |
| CN113122184B (en) | Preparation method of biomass porous carbon wave-absorbing material | |
| CN105694427A (en) | Application of graphene composite material electromagnetic shielding material | |
| CN113023723B (en) | Electromagnetic wave-absorbing material prepared from shaddock peel and preparation method thereof | |
| CN105060289A (en) | Method for preparing fewer-layer graphene on basis of biomass waste | |
| CN110734048A (en) | Preparation method of three-dimensional ordered carbon-based porous wave-absorbing material based on raw wood | |
| CN111218112A (en) | rGO/polyimide composite aerogel and preparation method and application thereof | |
| CN111410194B (en) | Composite electromagnetic wave-absorbing foam prepared from ZIF-67/melamine and preparation method thereof | |
| CN111818785B (en) | Low-temperature foaming process for preparing thin-layer carbon-loaded nano ZnO wave-absorbing material in batches | |
| CN113174751B (en) | Multi-stage heterostructure composite material, preparation method thereof and electromagnetic microwave absorption application | |
| CN109879270B (en) | Preparation method of light ultra-wideband carbonized waxberry wave-absorbing material | |
| CN110746931B (en) | Method for preparing ITO/porous carbon composite wave-absorbing material by taking In-MOFs as template | |
| CN114315365B (en) | Silicon carbide aerogel material and preparation method thereof | |
| CN110130096A (en) | A kind of preparation method of flexible fiber fabric composite thermoelectric material | |
| CN104961493A (en) | Preparation method for biomass base porous silicon carbide wave absorbing material | |
| CN114295576A (en) | Preparation method and detection method of terahertz wave broadband shielding thermal-stability composite film based on MXene | |
| CN112499685B (en) | Preparation of MnO 2 Method for preparing @ porous carbon composite wave-absorbing material | |
| Shu et al. | Hierarchical C/Co 3 O 4 nanoarray on a nickel substrate integrating electromagnetic and thermal shielding | |
| CN111807346B (en) | Preparation method of broadband efficient wave-absorbing macroporous thin-layer carbon material | |
| CN113292964A (en) | Carbon-based composite material based on popcorn as well as preparation method and application thereof | |
| CN108587565B (en) | Sulfur-doped high-conductivity graphene type light wave-absorbing material and preparation method and application thereof | |
| CN112250057A (en) | Preparation method of ammonium nitrate-assisted macroporous thin-layer carbon | |
| CN105315964A (en) | Method for synthesizing ferriferrous oxide conductive polymer graphene ternary composite wave absorbing agent | |
| CN111235697A (en) | Preparation method of lignin-based carbon material with high wave-absorbing performance | |
| CN103738947A (en) | Preparation method for single-layer graphene ethylene glycol solution |
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 |