A novel double 3D continuous phase composite with ultra-broadband wave absorption from gigahertz to UV–vis-NIR for extremely cold environment

Shi, Yunan; Du, Jiang; Qiu, Jun

doi:10.1016/j.cej.2022.135220

Cited by 18 publications

(6 citation statements)

References 60 publications

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“…In Figure 2c, the characteristic peaks at 284.8, 286.2, and 288.8 eV are corresponding to graphitized structure, CO and OCO bonds, respectively. [55] The spectrum of element O 1s has four particular peaks displayed in Figure 2d separately located at 530.6, 531.9, 532.3, and 534.8 eV, which is ascribed to the remaining oxygen groups, including OC, CO, and chemisorbed O/adsorbed water in the composite foam. [56] Compare to the element C and O spectra in CF (Figure S4, Supporting Information), the intensity of the OCO peaks increases remarkably, showing that crosslinked PCL has coated on the CF framework.…”

Section: Structural Characterizationmentioning

confidence: 99%

Triple Stimuli‐Responsive Flexible Shape Memory Foams with Super‐Amphiphilicity

Ding

Shi

et al. 2022

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source. Ko et al. construct a temperature-responsive SMP film by integrating polylactic acid (PLA) and thermoplastic polyurethane (TPU). [15] Ni et al. simply adjust the layers of graphene oxide coating on SMP to design thermal-responsive devices. [16] However, the single responsive ability cannot meet the requirement of increasingly complex and changeable application environment. [17][18][19] On the other hand, the solid planar or strip geometries of traditional SMPs limit the expansion of new horizons. [20][21][22][23] Thus, it is urgent and important to fabricate 3D porous and flexible SMPs with multiresponsive function.Recent advances have progressed to use a 3D porous material as the framework added with functional fillers to construct electrical/thermal conductive networks for achieving multi-responsive SME. [24,25] MS has aroused great interest as the 3D framework for its low cost, low density, high porosity, and great elasticity. [26] Carbonbased fillers including MXene, [27][28][29] carbon nanotubes (CNT), [30][31][32] graphene, [24,[33][34][35] and carbon black (CB) are preferred candidates for their excellent photothermal and electrothermal performance. [32,36] He et al. combine the MS framework with MXene/silver nanowires (AgNWs) to design a thermal/electrical transmissive 3D network. [37] Triple-stimuli responsive shape memory composites are obtained by injecting an SMP into the hybrid framework by vacuum impregnation. Wu et al. prepare graphene nanoplatelet (GNP) hybrid-coated MS (CG@MS) incorporated with polyethylene glycol (PEG) to realize a notable photo/electrostimuli SME. [38] However, complicated and costly methods are challenging for large-scale production. [39][40][41][42][43] Meanwhile, the poor compatibility between the 3D porous framework and the functional fillers, as well as the inhomogeneous dispersion, also pose problems.An alternative method for constructing the 3D electrical/ thermal conductive network is to carbonize the MS. [44] The obtained carbon foams (CFs) actually become brittle or fragile after high-temperature carbonization. The conductivity and photothermal activity of the CFs are also not satisfactory for initiating SME at a safe voltage or realizing photothermal conversion efficiently. [45] Herein, we propose a specific multi-step carbonization protocol for transforming commercial MS to highly porous CF with robust resilience, excellent photothermal and electrothermal properties. Owing to the super-amphiphilicity of Highly porous multi-responsive shape memory foams have unique advantages in designing 3D materials with lightweight for varied applications. Herein, a facile and efficient approach to fabricating a thermo-, electro-, and photo-responsive shape memory composite foam is demonstrated. A specific multi-step carbonization protocol is adopted for transforming commercial melamine sponge (MS) to highly porous carbon foam (CF) with robust elastic resilience, efficient electrothermal/photothermal conversions, and superamphiphilicity. It is a novel proposal for CF to ta...

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Section: Structural Characterizationmentioning

confidence: 99%

Triple Stimuli‐Responsive Flexible Shape Memory Foams with Super‐Amphiphilicity

Ding

Shi

et al. 2022

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“…Recent investigations into the integration of twodimensional nanomaterials, such as transition metal carbides, nitrides, or carbonitrides (collectively termed MXenes) in conjunction with magnetic microspheres, have demonstrated substantial capacity for enhancing the terahertz absorption properties of composites. 16,17 Furthermore, the observed synergistic interactions between the components may facilitate the advancement of terahertz modulation for a variety of applications. In addition, research has shown that adding a porous structure to the polymer substrate increases the loss of electromagnetic wave scattering, thereby improving the device's terahertz shielding and stealth performance.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, their effective frequency bandwidths seldom surpass 80% of the targeted range, with performance degradation observed under oblique incidence conditions. − The incorporation of conductive fillers including graphene, carbon nanotubes, carbon fibers, and metal nanomaterials , with flexible polymer matrices has gained momentum, leading to the development of composite conductive polymers that exhibit superior stretchability compared to conventional metals. Recent investigations into the integration of two-dimensional nanomaterials, such as transition metal carbides, nitrides, or carbonitrides (collectively termed MXenes) in conjunction with magnetic microspheres, have demonstrated substantial capacity for enhancing the terahertz absorption properties of composites. , Furthermore, the observed synergistic interactions between the components may facilitate the advancement of terahertz modulation for a variety of applications. In addition, research has shown that adding a porous structure to the polymer substrate increases the loss of electromagnetic wave scattering, thereby improving the device’s terahertz shielding and stealth performance. − However, the advantages are tempered by high fabrication costs and the challenge of integrating conductive additives uniformly without sacrificing matrix porosity .…”

Section: Introductionmentioning

confidence: 99%

In Situ Laser-Induced 3D Porous Graphene within Transparent Polymers for Encapsulation-Free and Tunable Ultrabroadband Terahertz Absorption

Huang,

Liang,

Wang

et al. 2024

ACS Appl. Mater. Interfaces

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Three-dimensional (3D) porous carbon materials have great potential for fabricating flexible tunable broadband absorbers owing to their high electrical conductivity, strong dielectric loss, and unique microstructure. Herein, we introduce an innovative method for synthesizing 3D porous graphene that incorporates advanced tuning and encapsulation processes to augment its functional efficacy. Through the modulation of both thermal and nonthermal interactions between a femtosecond (fs) laser and a polydimethylsiloxane (PDMS) film, we have synergistically fine-tuned the surface morphology and lattice properties of 3D porous graphene. This approach enabled us to create a flexible terahertz (THz) absorber with customizable characteristics, boasting an impressive absorbance range of 80%–99% in the 0.4–1.0 THz spectrum, alongside a peak reflection loss (RL) of up to 35.6 dB. Furthermore, we have successfully demonstrated the production of photoinduced 3D porous graphene within a PDMS film, which serves as both a carbon precursor and protective layer. This simplifies the conventional packaging process. These devices exhibit a RL of up to 41.6 dB and an absorption bandwidth of 2.5 THz (0.6–3.1 THz). Our study presents a production methodology for high-performance, flexible THz absorbers, offering a straightforward and innovative solution for the rapid development of sophisticated, flexible THz absorbing materials.

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“…Carbon nanomaterials, such as graphene oxide or carbon nanotubes, [35][36][37][38] are advantageous due to their high extinction coefficients. [39,40] PMAs based on them have shown high absorption in the UV-vis-NIR regime [41][42][43][44] and have been used for applications such as improved solar water purification. However, submillimeter thickness is sometimes required for carbon-based flexible PMAs to boost their absorption and mechanical strength.…”

Section: Introductionmentioning

confidence: 99%

“…However, submillimeter thickness is sometimes required for carbon-based flexible PMAs to boost their absorption and mechanical strength. [41,42,44] Notably, plasmonic metamaterials have also been used to realize flexible PMAs. Configurations include arrays, [45][46][47][48] layered materials, [49][50][51] and nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Flexible, Ultrathin, and Lithographic‐Free Nanocoral Metamaterial Membrane for Omnidirectional UV–vis–NIR Broadband Absorption

et al. 2023

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UV–vis–NIR metamaterial absorbers are key components for devices used in photothermal applications, especially those related to solar energy. Demanded by modern applications using nonplanar devices, they should be flexible, thin, mass producible, easy for integration, and demonstrate strong omnidirectional light absorption over wide spectral ranges. However, there are few ways to achieve these simultaneously. Additionally, most fabrication methods are substrate dependent, limiting integrability, or involve lithography, which can be costly and difficult. Herein, a metamaterial absorber that meets all the requirements above is demonstrated, using a simple substrate‐independent lithographic‐free process. It is composed of 3D randomized gold@SU‐8 hybrid nanocoral structures of ≈2 μm thin on a supporting membrane, which can be different materials to meet various integration needs depending on applications. Benefiting from multilevel hybridizations of plasmon resonance reinforced by strong light‐trapping effect, >90% optical energy ranging from 250 to 2500 nm is omnidirectionally absorbed. The perfect metamaterial absorber exhibits very stable photothermal conversion properties with great reproducibility and durability. The excellent performance, thinness, flexibility, and simple fabrication method grant the presented absorber great potential in modern photothermal applications, especially those requiring nonplanar thin‐film devices.

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A novel double 3D continuous phase composite with ultra-broadband wave absorption from gigahertz to UV–vis-NIR for extremely cold environment

Cited by 18 publications

References 60 publications

Triple Stimuli‐Responsive Flexible Shape Memory Foams with Super‐Amphiphilicity

Triple Stimuli‐Responsive Flexible Shape Memory Foams with Super‐Amphiphilicity

In Situ Laser-Induced 3D Porous Graphene within Transparent Polymers for Encapsulation-Free and Tunable Ultrabroadband Terahertz Absorption

Flexible, Ultrathin, and Lithographic‐Free Nanocoral Metamaterial Membrane for Omnidirectional UV–vis–NIR Broadband Absorption

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