Flexible, stretchable, waterproof (IPX7) electro-thermal films based on graphite nanoplatelets &amp; polyurethane nanocomposites for wearable heaters

Chen, Wei; Yang, Shaoqing; Wang, Huatao; Yang, Ketong; Wu, Xulei; Gao, Feng; Zheng, Bojun; Qian, Kun; Zhang, Tao; Zhang, Chao; Huang, Xiaoxiao

doi:10.1016/j.cej.2021.133990

Cited by 13 publications

(6 citation statements)

References 37 publications

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“…The stress–strain curves of CF0.05 and CFCNT0.05 are shown in Figure d. The fabricated nanocomposite showed stress and strain values that are almost identical to the PU. , The tensile test analysis suggests that by adding the CFCNT in the PU, a very slight improvement in the tensile strength of the nanocomposite is observed as compared to CF without compromising the strain% (>400%).…”

Section: Results and Discussionmentioning

confidence: 92%

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Tahalyani

Akhtar

Kar

2023

ACS Appl. Nano Mater.

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Highly flexible, bendable, stretchable, and ultralightweight microwave absorbers (MA) that can handle harsh environments are essential for conformal surface coating in aerospace and defence industries. Hence, crystalline carbon nanotubes (CNTs) are grown on carbon fibers (CFs) using the chemical vapour deposition technique (CVD) and embedded in polyurethane (PU) to obtain MA. The fabricated MA is flexible, highly stretchable (>400%), has a low percolation threshold (0.1 wt %), ultralightweight (0.35 wt %), and thin nanocomposite for enhanced microwave absorber performance. The thickness of MA is optimized to achieve the impedance matching condition by utilizing the CST microwave studio simulation and verified experimentally. The minimum reflection loss (R L) of −52.53 dB with effective absorber bandwidth (EAB) covering the complete X band at a 2.4 mm thickness is obtained for just 0.35 wt % CFCNT. The negligible change in R L and EAB after 1000 bending cycles and 2 h of water-bath sonication confirms the operating efficiency of MA in harsh environmental conditions. The mechanism of microwave absorption in the case of CF and CFCNT-based MA is elucidated concerning microwave properties, electrical conductivity, and morphology. The CST microwave studio simulation is also extended from the X band to the Ku band (12.4–18 GHz) for broadband microwave absorber application.

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Section: Results and Discussionmentioning

confidence: 92%

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Tahalyani

Akhtar

Kar

2023

ACS Appl. Nano Mater.

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“…3c presents the thermal stability and durability of the HS-CNT/LCE actuator, which underwent 15 cycles at 3 V. The heating performance remained consistent even during the 10-minute cycle test. For comparison purposes, the saturation temperature and heating rate of various electrothermal films under low voltage (≤12 V), including Ag-based heaters, 35,39–43 Mxene-based heaters, 44,45 conductive polymer heaters, 46,47 carbon-based heaters, 48–52 and the HS-CNT heater proposed in this study were evaluated, as depicted in Fig. 3d(i and ii).…”

Section: Resultsmentioning

confidence: 99%

Adaptive nanotube networks enabling omnidirectionally deformable electro-driven liquid crystal elastomers towards artificial muscles

Wang,

Zhou,

Fan

et al. 2024

Mater. Horiz.

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“…In addition, the electro-heating capability of the S-CNTs/elastomer nanocomposite was explored in an underwater scenario with potential applications in cold water circumstance, extreme outdoor sports, and hypothermia prevention. [5,48] Figure S15 (Supporting Information) displays the optical and IR images of the nanocomposite underwater heating performance without use of any waterproofing. The IR images also show that the stretchable heater is able to heat the surrounding water.…”

Section: Joule Heating Conversion and Electro-thermal Actuatingmentioning

confidence: 99%

“…Stretchable electronics with capabilities in mechanical sensing, [1][2][3] Joule heating, [4][5][6][7] and electro actuating [8][9][10] have been intensively studied for use in electronic skin (E-skin), [11][12][13] artificial intelligence (AI), [14,15] as well as bio-robotics. [16][17][18] Stretchable ∑ τ τ ( )…”

Section: Introductionmentioning

confidence: 99%

Novel Sulfur‐Containing Carbon Nanotubes with Graphene Nanoflaps for Stretchable Sensing, Joule Heating, and Electro‐Thermal Actuating

Ren

Zhao

Zhang

et al. 2023

Adv Funct Materials

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Stretchable conductors based on nanopercolation networks have garnered great attention for versatile applications. Carbon nanotubes (CNTs) are well‐suited for creating high‐efficiency nanopercolation networks. However, the weak interfacial shear strength (IFSS) between CNTs and elastomer hardly dissipates the deformation energy and thus deteriorates the conductive network. Herein, a novel sulfur‐containing CNTs attached with abundant graphene nanoflaps using a two‐step sulfidation strategy are developed. The sulfur functionality creates a strong interfacial interaction with the elastomer polymer, while the graphene nanoflaps provide an enhanced, intertwined shear interface with elastomer that is capable of efficiently dissipating the deformation energy. As a result, the optimized nanocomposite significantly improves the IFSS between nanofiller and elastomer, displaying remarkable conductive robustness (ΔR/R0≈1.8 under 200%), superior stretchability (> 450%), and excellent mechanical durability (≈30 000 cycles). Moreover, the nanocomposite demonstrates excellent Joule heating efficiency (≈150 °C in 12 V), stretchable heating conversion (≈200%), and long‐term stability (> 24 h). To illustrate its capabilities, the nanocomposite is used to track human physiological signals and perform electric‐thermal actuating as a set of soft tongs. It is believed that this innovative approach will provide value for the development of wearable/stretchable devices, as well as human‐machine interaction, and bio‐robotics in the future.

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Flexible, stretchable, waterproof (IPX7) electro-thermal films based on graphite nanoplatelets & polyurethane nanocomposites for wearable heaters

Cited by 13 publications

References 37 publications

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Flexible, Stretchable, and Lightweight Hierarchical Carbon-Nanotube-Decorated Carbon Fiber Structures for Microwave Absorption

Adaptive nanotube networks enabling omnidirectionally deformable electro-driven liquid crystal elastomers towards artificial muscles

Novel Sulfur‐Containing Carbon Nanotubes with Graphene Nanoflaps for Stretchable Sensing, Joule Heating, and Electro‐Thermal Actuating

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