High reliable electromagnetic interference shielding carbon cloth with superamphiphobicity and environmental suitability

Qu, Mengnan; Yang, Xin; Peng, Lei; Liu, Lulu; Yang, Chen; Zhao, Zhao; Liu, Xiangrong; Zhang, Tianjun; He, Jinmei

doi:10.1016/j.carbon.2020.12.015

Cited by 40 publications

(14 citation statements)

References 48 publications

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“…To quantify the feasibility of EMI shielding for smart textiles, the prepared EMS-TENG was fabricated into a smart fabric with plain woven structure. The overall SE T is the sum of the reflection loss (SE R ), absorbing loss (SE A ), as calculated in equation [56,57]…”

Section: Resultsmentioning

confidence: 99%

Electromagnetic Shielding Triboelectric Yarns for Human–Machine Interacting

Shen

Jia

Cheng

et al. 2021

Adv Elect Materials

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the development is massive requirements in electronic devices/systems, in a total of billions to trillions, each of which needs electronic products. [5][6][7][8][9][10] Inevitably, portable electrical components and complex circuits controlled by wireless network generate undesirable electromagnetic (EM) radiation. [11][12][13][14][15] Thus, electromagnetic interference (EMI) is one of the most inevitable byproducts of modern electronics that severely threatens living environment and human health. Generally, fabrics, as the second skin for human beings, are regarded as the indispensable necessities for effectively protecting human from electromagnetic wave harm. [16][17][18] However, benefitting from the fast development of technology as well as aiming to catering to the advancement of society, fabrics are gradually evolving towards intelligence instead of single performance. For that, the invention of variety smart sensors based on wearable fabric provides opportunities in both monitor service and identification by tracking of physiological signals. Thus, taking impairment of human health into consideration, the demands for flexible, versatile, and wearable fabric with good EMI shielding and real-time sensing are highly desirable. [19][20][21][22] Sparked by the 5G technology, wearable products with flexibility and electronic functionality have underwent flourishing advancement in recent years. [23,24] Smart fabrics, belonging to Electromagnetic radiation, as one of the public hazards that injures human health and information safety, shall be shielded from the ambient environment. Here, by the virtue of polypyrrole polymerized polyamide yarns and silicone rubber, a yarn-based electromagnetic shielding-triboelectric nanogenerator (EMS-TENG) equipped with sensing ability is presented, which not only generates electricity from harvesting body motion energy but also serves as EMS to prevent electromagnetic interference. With the aid of knitting method, the developed EMS-TENG fabric exhibits the EMS effectiveness of 32.49 dB in 8.2-12.5 GHz and achieves a maximum instantaneous peak power density of 142.27 µW m −1 . Furthermore, a real-time human-interactive system is developed by adopting the Internet of Things technology and EMS-TENG sensor. Based on the above, a simulated intelligent calculator with multiplication and division function is proposed, which can successfully translate electronic signals to digital numbers. With energy harvesting and self-powered sensing abilities, the EMS-TENG can convert mechanical energy into electrical signals from human movements. Looking forward, the EMS-TENG spurs an innovative technique toward a self-powered human-interactive sensing and functional protective textile for next-generation intelligent wearable applications.

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Section: Resultsmentioning

confidence: 99%

Electromagnetic Shielding Triboelectric Yarns for Human–Machine Interacting

Shen

Jia

Cheng

et al. 2021

Adv Elect Materials

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“…These dielectric composites are commonly modeled using the micro‐capacitor model and percolation theory. When the filler content of conductive fillers is close to the percolation threshold ( f c ), there is a sudden increase in ε' , which is always accompanied by the inevitable loss 9–11 . Therefore, these materials cannot be considered suitable for capacitor applications due to the inevitable energy loss.…”

Section: Introductionmentioning

confidence: 99%

“…When the filler content of conductive fillers is close to the percolation threshold (f c ), there is a sudden increase in ε', which is always accompanied by the inevitable loss. [9][10][11] Therefore, these materials cannot be considered suitable for capacitor applications due to the inevitable energy loss. Consequently, researchers are primarily focused on finding ways to trade off the contradiction between highε' and large E b , while maintaining a rather low loss in composite dielectrics.…”

Section: Introductionmentioning

confidence: 99%

Interfacial insight of core@double‐shell Mo@MoO₃@PS/PVDF composites towards prominently meliorative dielectric performances

Wang

Zhou

Chen

et al. 2023

J of Applied Polymer Sci

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Polymer dielectrics with synergistically large dielectric permittivity (ε') and breakdown strength (Eb) but prohibited loss is of crucial applications in the electronic devices and power equipment. In this study, we aim to elevate the integrated dielectric performances of molybdenum (Mo)/polyvinylidene fluoride (PVDF) by constructing a semiconducting molybdenum oxide (MoO3) shell and insulating polystyrene (PS) shell on the Mo surface through high‐temperature oxidation followed by suspension polymerization. The resulting core@double‐shell Mo@MoO3@PS particles were compounded with PVDF to achieve high ε' and Eb while minimizing the loss. The results reveal that the Mo@MoO3@PS/PVDF composites indicate simultaneously ameliorative ε' and Eb along with restrained loss owing to the existence of the MoO3@PS double‐shell, which not only prominently enhances the interfacial compatibility and interactions between fillers and PVDF, but significantly inhibits the conductivity and loss through impeding the long‐distance motion of carrier charges. The dielectric capabilities could be improved by adjusting the thickness of the PS interlayer. The Havriliak‐Negami equation was used to fit the experimental results, which showed the impact of the PS shell on the polarization mechanism and how it inhibits carrier migration. The Mo@MoO3@PS/PVDF with high ε' and Eb yet exceptionally low loss exhibit potential applications in microelectronics and electrical industries.

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“…For example, in the light of the mixing rules, a noticeable increase in ε ′ can be merely attained at a very large filler loading (>50 vol%); unavoidably, the mechanical flexibility and processability of polymer composites will be significantly decreased. Moreover, due to the giant differences in both the conductivity and ε ′ between the fillers and the polymer matrix, the resulting local electric field concentration and distortion caused by a high filler loading will remarkably do damage to the E b 16,17 . For the conductive fillers/polymer composites, little amounts of conductive fillers, such as graphite, carbon black, carbon nanotube (CNT), and metallic particles (zinc [Zn], silver [Ag], copper [Cu], etc.)…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, due to the giant differences in both the conductivity and ε 0 between the fillers and the polymer matrix, the resulting local electric field concentration and distortion caused by a high filler loading will remarkably do damage to the E b . 16,17 For the conductive fillers/polymer composites, little amounts of conductive fillers, such as graphite, carbon black, carbon nanotube (CNT), and metallic particles (zinc [Zn], silver [Ag], copper [Cu], etc.) can distinctly increase the polymers' ε 0 due to the percolating effect.…”

mentioning

confidence: 99%

Interface modified Si@SiO₂/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties

Kong

Zhou

Peng

et al. 2023

J of Applied Polymer Sci

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To efficaciously decrease dielectric loss while still synchronously harvesting a high dielectric constant (ε′) and breakdown strength (Eb), as well as good mechanical properties in silicon (Si)/poly(vinylidene fluoride) (PVDF), in this work, the core@shell structured Si@silicon dioxide (SiO2) particles were first prepared via a high temperature oxidation, and subsequently incorporated into the PVDF to generate morphology‐dependent composites with a high‐ε′ and Eb but low loss. The SiO2 shell effects on the morphology, dielectric, and mechanical properties of PVDF composites were explored. In comparison to pristine Si/PVDF, the Si@SiO2/PVDF presents significantly suppressed loss and boosted Eb because the SiO2 interlayer not only efficiently blocks the connection between the raw Si and greatly impedes the long‐range charges migration even at high filler loadings, but also obviously improves the compatibility between Si and PVDF at the interfaces which promotes fillers' uniform dispersion in host matrix, thus leading to enhanced dielectric and mechanical properties. The fitting result by the Havriliak–Negami equation theoretically elucidates the SiO2 interlayer's suppression effect on charge migration behavior in the composites. More importantly, dielectric properties can be efficiently turned via tailoring the SiO2 shell thickness. The Si@SiO2/PVDF with simultaneously enhanced dielectric and mechanical performances shows promising uses in the electrical and microelectronics industries.

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High reliable electromagnetic interference shielding carbon cloth with superamphiphobicity and environmental suitability

Cited by 40 publications

References 48 publications

Electromagnetic Shielding Triboelectric Yarns for Human–Machine Interacting

Electromagnetic Shielding Triboelectric Yarns for Human–Machine Interacting

Interfacial insight of core@double‐shell Mo@MoO₃@PS/PVDF composites towards prominently meliorative dielectric performances

Interface modified Si@SiO₂/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties

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High reliable electromagnetic interference shielding carbon cloth with superamphiphobicity and environmental suitability

Cited by 40 publications

References 48 publications

Electromagnetic Shielding Triboelectric Yarns for Human–Machine Interacting

Electromagnetic Shielding Triboelectric Yarns for Human–Machine Interacting

Interfacial insight of core@double‐shell Mo@MoO3@PS/PVDF composites towards prominently meliorative dielectric performances

Interface modified Si@SiO2/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties

Contact Info

Product

Resources

About

Interfacial insight of core@double‐shell Mo@MoO₃@PS/PVDF composites towards prominently meliorative dielectric performances

Interface modified Si@SiO₂/PVDF composite dielectrics with synchronously ameliorative dielectric and mechanical properties