Surface modification and microwave absorption properties of lightweight CNT absorbent

Tang, Jin; Bi, Shuping; Su, Zheng-an; Hou, Genliang; Liu, Chaohui; Li, Hao; Lin, Yang-yang

doi:10.1007/s10854-019-02474-8

Cited by 13 publications

(5 citation statements)

References 48 publications

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“…A more intuitive comparison of the MA performance of as-resulted SLCP coatings is depicted in Figure g. Especially, our peelable MA coating is evaluated to offer a much better comprehensive performance among most typical polymer-based MA coatings of the open literature no matter in aspects of ultrathin, lightweight, and ultrawide EAB characteristics (Figure h). − Particularly, the intrinsic peelability and reusability of peelable MA coating can avoid complex modification strategies, which is superior to the traditionally similar MA materials, offering a promising electromagnetic protection scheme. The radar cross-section (RCS) simulations of a perfect electric conductor (PEC) and a PEC layer covered by 2 mm SLCP coatings are confirmed by the computer simulation techniques (CST) given in Figure i, which can evaluate the radar stealth ability of materials .…”

Section: Resultsmentioning

confidence: 99%

Peelable Microwave Absorption Coating with Reusable and Anticorrosion Merits

Li,

Shi,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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The peelable microwave absorption (MA) coating with reversible adhesion for stable presence on substrates and easy release without any residuals is highly desired in temporary electromagnetic protection, which can quickly enter and disengage the electromagnetic protection state according to the real-time changeable harsh surroundings. On the contrary, with the incorporation of abundant absorbent to achieve excellent MA ability, the tunable adhesion and sufficient cohesion are extremely challenging to fulfill the above requirement. The reported peelable coatings still have problems in controlling adhesion/cohesion strength and coating release, facing substantial residuals after peeling even using complex chemical modification or abundant additives. Herein, a peelable MA coating based on the block characteristics of polar and nonpolar segments of poly(styrene-(ethylene-co-butylene)-styrene) (SEBS) is successfully developed. The polyaniline-decorated carbon nanotube as a microwave absorber plays a positive influence on the adhesion/cohesion of the coating due to bonding interaction. The competitive effective absorption bandwidth (EAB) of 8.8 GHz and controllable yet reversible adhesion release on various substrates and complex surfaces have been achieved. The reusability endows peelable MA coating with 93% retention of EAB even after ten coating-peeling cycles. The coating with excellent chemical and adhesion stability can effectively protect substrates from salt/acid/alkali corrosion, showing over 98% retention of EAB even after 8 h of accelerated corrosion. Our peelable MA coating via a general yet reliable approach provides a prospect for temporary electromagnetic protection.

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Section: Resultsmentioning

confidence: 99%

Peelable Microwave Absorption Coating with Reusable and Anticorrosion Merits

Li,

Shi,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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“…From Figure 2 b,d, it can be seen that CB is tightly attached to the surface of RGO in a grape shape. More information on the performance of this acid-modified CNT and CB/RGO can be found in the previous research results of our working group [ 8 , 19 ].…”

Section: Resultsmentioning

confidence: 99%

“…As shown in Figure 1 a, the acidified CNTs and CB/RGO were fabricated through the method reported in our previous work [ 8 , 19 ]. CNTs and CB/RGO were mixed with PU using a high-speed mixer to form a uniform slurry.…”

Section: Methodsmentioning

confidence: 99%

Lightweight and Compression-Resistant Carbon-Based Sandwich Honeycomb Absorber with Excellent Electromagnetic Wave Absorption

Song

Hou

et al. 2022

Nanomaterials

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Honeycomb (HC) composites were fabricated by impregnating an aramid paper HC core with carbon nanotubes/carbon black/reduced graphene oxide (CNTs/CB/RGO) and polyurethane resin (PU). The sandwich HC (SHC) absorber containing HC composites with superior microwave-absorption properties were fabricated using the vacuum bagging method. Through the absorption performance of the SHC absorber, it can be concluded that the triple-layer SHC absorber has the best absorbing performance. The effective bandwidth (reflection loss < 10 dB) can be achieved in the entire frequency range of 2.2–18 GHz, and the minimum RL value is −35 dB. Furthermore, the compressive stress of the triple-layer SHC absorber reached 3.71 MPa, which is similar to the compressive stress of aluminum HC panels for aviation. Benefiting from the excellent integration of absorption and mechanical performance, the SHC has significant potential in the stealth-technology field.

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“…In addition, low-density carbon materials are preferred because they facilitate the preparation of lightweight wave-absorbing materials. The microwave-absorbing materials based on carbon nanotubes and graphene, which are outstanding representatives of carbon materials, have been studied extensively and have shown good application prospects. − However, several challenges remain associated with their large-scale production, primarily due to harsh preparation conditions. In recent years, biomass-derived carbon has become a research hotspot due to factors such as high availability, environmental friendliness, ease of preparation, and rich natural porous structure.…”

Section: Introductionmentioning

confidence: 99%

Corncob-Derived Two-Dimensional N-Doped Carbon Sheets as the Ultrabroadband Microwave-Absorbing Material

Xie,

Wang,

et al. 2023

ACS Appl. Electron. Mater.

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Biomass-derived carbon is a microwave-absorbing material that has shown considerable potential for diverse applications due to advantages such as the wide range of sources and the natural multilevel structure. However, the primary issues related to pure carbon materials are their weak absorption intensity and narrow absorption band. In this study, two-dimensional N-doped carbon sheets were prepared by using corncob as the biomass precursor and melamine as the nitrogen source. After nitrogen doping, the samples attained high loss capability in the low-frequency region and enhanced impedance matching in the high-frequency region due to the combined effects of the structure, morphology, and composition on the electromagnetic parameters. Therefore, the absorption performance of the full frequency band was significantly enhanced, which was conducive to broadband absorption. The optimal sample attained a minimum RL of −57.27 dB at 14.64 GHz when the sample thickness was 2.6 mm. In addition, the effective bandwidth was up to 8.26 GHz (9.74−18.00 GHz) when the thickness was 2.9 mm. The strong absorption and broad effective bandwidth indicate that the N-doped carbon sheet can be used as a potential microwave absorber.

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Surface modification and microwave absorption properties of lightweight CNT absorbent

Cited by 13 publications

References 48 publications

Peelable Microwave Absorption Coating with Reusable and Anticorrosion Merits

Peelable Microwave Absorption Coating with Reusable and Anticorrosion Merits

Lightweight and Compression-Resistant Carbon-Based Sandwich Honeycomb Absorber with Excellent Electromagnetic Wave Absorption

Corncob-Derived Two-Dimensional N-Doped Carbon Sheets as the Ultrabroadband Microwave-Absorbing Material

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