High-efficiency electromagnetic interference shielding and thermal management of high-graphene nanoplate-loaded composites enabled by polymer-infiltrated technique

Li, Yike; Li, Wenjing; Wang, Zhixing; Du, Pei-Yao; Xu, Ling; Jia, Li‐Chuan; Yan, Ding‐Xiang

doi:10.1016/j.carbon.2023.118096

Cited by 37 publications

(8 citation statements)

References 42 publications

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“…The composites were further hot-pressed to prepare the CNT/EVA film. Such a strategy established the basis for the simplicity and general applicability of the fabrication process. − As manifested by SEM images, CNT was relatively homogeneously dispersed in DEVA-3. This was beneficial for the actuation behavior of the CNT/EVA film under NIR irradiation, since CNT was a superb photothermal medium. , …”

Section: Resultsmentioning

confidence: 99%

Permanent Shape Reconfiguration and Locally Reversible Actuation of a Carbon Nanotube/Ethylene Vinyl Acetate Copolymer Composite by Constructing a Dynamic Cross-Linked Network

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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Given the rapid developments in modern devices, there is an urgent need for shape-memory polymer composites (SMPCs) in soft robots and other fields. However, it remains a challenge to endow SMPCs with both a reconfigurable permanent shape and a locally reversible shape transformation. Herein, a dynamic cross-linked network was facilely constructed in carbon nanotube/ethylene vinyl acetate copolymer (CNT/ EVA) composites by designing the molecular structure of EVA. The CNT/EVA composite with 0.05 wt % CNT realized a steady-state temperature of ∼75 °C under 0.11 W/cm 2 light intensity, which gave rise to remote actuation behavior. The dynamic cross-linked network along with a wide melting temperature offered opportunities for chemical and physical programming, thus realizing the achievement of the programmable three-dimensional (3D) structure and locally reversible actuation. Specifically, the CNT/EVA composite exhibited a superior permanent shape reconfiguration by activating the dynamic cross-linked network at 140 °C. The composite also showed a high reversible deformation rate of 11.1%. These features endowed the composites with the capability of transformation to 3D structure as well as locally reversible actuation performance. This work provides an attractive guideline for the future design of SMPCs with sophisticated structures and actuation capability.

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Section: Resultsmentioning

confidence: 99%

Permanent Shape Reconfiguration and Locally Reversible Actuation of a Carbon Nanotube/Ethylene Vinyl Acetate Copolymer Composite by Constructing a Dynamic Cross-Linked Network

Sun

et al. 2023

ACS Appl. Mater. Interfaces

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“…A mixture of equal amounts of CNT and PANI without any modification was selected for comparison, named as SL(C + P). Therein, the SEBS/CNT@PANI coatings without octadecyl acrylate and with different amounts (2,4,6, and 8 wt %) of octadecyl acrylate were explored to optimize the surface energy to obtain the suitable adhesion and cohesion of coating, here denoted as S(L0), S(L2), S(L4), S(L6), and S(L8), respectively. Subsequently, the uniform suspension of SLCP mixtures was coated onto the different types of model surface, followed by air drying at 6h to obtain the SLCP coatings.…”

Section: Preparation Of Sebs/mentioning

confidence: 99%

“…Nowadays, the peelable microwave absorption (MA) coatings show great application potential with the increasing demands for temporary electromagnetic protection with reversible adhesion. − Especially, the rapidly changing electromagnetic protection capability of crucial equipment surfaces by means of peelable MA coating is highly convenient and desirable to adapt to the real use environment, which can quickly enter and disengage the electromagnetic protection state according to the real-time changeable harsh surroundings. The adhesion and cohesion strength and releasable characteristic of the polymer matrix of peelable MA coating are key factors affecting the MA performance; hence, tunable adhesion and sufficient cohesion in a substrate-coating system are extremely necessary for temporary electromagnetic protection coatings to achieve stable adhesion in service and easy removal off service without any damages and residuals on the substrate surface and any postprocessing .…”

Section: Introductionmentioning

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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“…The inherent rigidity of traditional metal electronic components presents limitations in their use, highlighting the importance of developing substrates with both good flexibility and conductivity . Graphene-based flexible composites exhibit outstanding conductivity and thus have a significant potential for flexible wearable applications. – These composites are typically prepared through direct growth via chemical vapor deposition or post-treatment techniques following solution synthesis; these techniques include solution mixing, , in situ polymerization, , and melt mixing. , The reinforcing graphene within a composite forms a random network structure, which has substantial contact resistance between graphene sheets . During thermal postprocessing, the distribution of graphene may exhibit a “coffee ring” effect. , The coffee ring effect is a phenomenon that occurs when a droplet of coffee or tea is deposited onto a surface, leaving behind a characteristic stain.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Field-Induced Aligned Graphene/Cellulose Conductive Composites for Electroluminescent Devices

Zhi,

Xu,

et al. 2023

ACS Appl. Nano Mater.

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Graphene is a promising reinforcement for fiber composite materials in flexible wearable applications because of its exceptional conductivity. Researchers have focused on bridging the gap between the intrinsic conductivity of graphene and the macroscopic performance of composite materials. The anisotropy of 2D nanomaterials indicates that their orientation and distribution are crucial factors in determining the macroscopic performance of thin films and bulk materials. Various technologies developed to control the formation of microstructures include electric and magnetic field methods, hot pressing, centrifugation, and freeze-drying. In this study, we prepared flexible graphene/cellulose composite film materials and used magnetic fields to regulate the orientation and distribution of graphene within cellulose paper. Results show that the grid structure of graphene arranged on the composite material produced interconnected conductive paths and reduced the graphene permeation threshold. By giving the conductive layer a higher dielectric constant, we prevented its breakdown as a conductive film. Electroluminescent devices were constructed using graphene/cellulose flexible composite materials and achieved an effective improvement in luminescence performance. Furthermore, directional luminescence was obtained through a microstructure design. This study provides a feasible path for using 2D nanomaterials in high-performance, flexible wearable devices.

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High-efficiency electromagnetic interference shielding and thermal management of high-graphene nanoplate-loaded composites enabled by polymer-infiltrated technique

Cited by 37 publications

References 42 publications

Permanent Shape Reconfiguration and Locally Reversible Actuation of a Carbon Nanotube/Ethylene Vinyl Acetate Copolymer Composite by Constructing a Dynamic Cross-Linked Network

Permanent Shape Reconfiguration and Locally Reversible Actuation of a Carbon Nanotube/Ethylene Vinyl Acetate Copolymer Composite by Constructing a Dynamic Cross-Linked Network

Peelable Microwave Absorption Coating with Reusable and Anticorrosion Merits

Magnetic Field-Induced Aligned Graphene/Cellulose Conductive Composites for Electroluminescent Devices

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