Highly efficient electromagnetic interference shielding and superior mechanical performance of carbon nanotube/polydimethylsiloxane composite with interface-reinforced segregated structure

Ma, Rui-Yu; Yi, Shuangqin; Li, Jie; Zhang, Jia-Le; Sun, Wen-Jin; Jia, Li‐Chuan; Yan, Ding‐Xiang; Li, Zhong‐Ming

doi:10.1016/j.compscitech.2022.109874

Cited by 46 publications

(14 citation statements)

References 61 publications

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“…7. For comparison, the thermally tunable absorption shielding values of this study at 100 °C surpass the SE values of recently published externally tunable composite systems 4,5,9,31–39 and green shielding composite systems, 25,40–45 as listed in Table 2. Additionally, KIL3 at 100 °C also exhibited the highest green index value of ∼101 reported to date in the literature, 25,40–45 as shown in Table 2.…”

Section: Resultsmentioning

confidence: 48%

Ionic liquid-dispersed PDMS/SWCNT/Ag@Ni hybrid composite for temperature- and pressure-sensitive smart electromagnetic shielding applications

et al. 2023

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Section: Resultsmentioning

confidence: 48%

Ionic liquid-dispersed PDMS/SWCNT/Ag@Ni hybrid composite for temperature- and pressure-sensitive smart electromagnetic shielding applications

et al. 2023

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“…In practical applications, mechanical properties are one of the most considerable characteristics of materials [ 42 ], and they are a major limitation for the engineering applications of segregated CPCs. Thus, it is of great significance to improve the mechanical properties of segregated CPCs [ 43 , 44 , 45 ]. To evaluate the potential applications for the composites, the mechanical performances of the PA6/612-GS composites were explored by using a tensile test.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Mechanical Property of Polyamide-6/Graphite Sheet Composites with Segregated 3D Network Binary Structure for High Thermal Conductivity

Gao¹,

Li²,

Kong³

et al. 2023

Polymers

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Segregated conductive polymer composites exhibit excellent electrical properties with a low percolation threshold. However, the mechanical properties of the segregated conductive polymer composites were always poor because the conductive fillers at the interfaces hinder polymer chain diffusion and thus lead to weak interfacial interaction between the conductive fillers and the polymer matrix. In this paper, polyamide-6 and polyamide-612 microspheres were synthesized via the in situ anionic ring opening of caprolactam and laurolactam. Segregated graphite sheets/polyamide-6(GS/PA6) and polyamide-612(PA612) composites with good mechanical properties were realized via high-pressure solid-phase compression molding. The microstructures of the composite samples were observed by scanning electron microscopy, which showed that the formation of a GS-conductive network at the PA6 granule interfaces in the segregated conductive structures and the adopting of PA612 considerably improved the interfacial adhesion of the composites. A superior impact strength of 5.1 kJ/m2 was achieved with 50 wt% PA612 loading owing to improvements in the interface compatibility between PA6 and GS. The composites possessed an ultralow percolation threshold, which was ascribed to the segregated network structure being successfully constructed inside the material. As for GS/PA6 composites, the combination of segregated GS-conductive networks achieved an ultralow percolation of 2.8 vol%. The percolation of 80PA6/20PA612-GS composites was slightly higher, measuring up to 3.2 vol%. Moreover, the thermal conductivity of the 80PA6/20PA612-GS composites increased from 0.26 to around 0.5 W/(m·K), which was 1.9 times larger than the pure polyamide.

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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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Highly efficient electromagnetic interference shielding and superior mechanical performance of carbon nanotube/polydimethylsiloxane composite with interface-reinforced segregated structure

Cited by 46 publications

References 61 publications

Ionic liquid-dispersed PDMS/SWCNT/Ag@Ni hybrid composite for temperature- and pressure-sensitive smart electromagnetic shielding applications

Ionic liquid-dispersed PDMS/SWCNT/Ag@Ni hybrid composite for temperature- and pressure-sensitive smart electromagnetic shielding applications

Enhanced Mechanical Property of Polyamide-6/Graphite Sheet Composites with Segregated 3D Network Binary Structure for High Thermal Conductivity

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

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