Enhanced electromagnetic wave absorption of magnetite-spinach derived carbon composite

Colloids and Surfaces A Physicochemical and Engineering Aspects, Год журнала: 2024, Номер 694, С. 134149 - 134149

Опубликована: Май 3, 2024

The high density, cost, and environmental pollution hinder the application of iron-based electromagnetic wave-absorbing materials. Although bio-carbon is a green lightweight dielectric material, performance still limited. This work successfully combined magnetite Fe3O4 with porous carbon derived from spinach stem using hydrothermal calcination methods. process optimizes matching constant magnetoconductivity as prepared composite resulting in significant improvement microwave absorption capacity. XRD, SEM, TEM, XPS, VSM EMW network analyzer are used to detect characterize samples. material shows excellent minimum reflection loss value -48.81 dB an efficacious bandwidth 4.73 GHz at optimal raw ratio. tests also show structure sample coercivity saturation magnetization 29.36 Oe 10.75 emu/g, respectively. test results indicate that wave due synergistic effect multiple reflection, Debye relaxation, interfacial polarization. Fe3O4-bio-carbon cheap simple prepare, it has performance. Therefore, great potential civilian military fields.

Язык: Английский

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Advanced Functional Electromagnetic Shielding Materials: A Review Based on Micro-Nano Structure Interface Control of Biomass Cell Walls

Nano-Micro Letters, Год журнала: 2024, Номер 17(1)

Опубликована: Сен. 20, 2024

Abstract Research efforts on electromagnetic interference (EMI) shielding materials have begun to converge green and sustainable biomass materials. These offer numerous advantages such as being lightweight, porous, hierarchical. Due their porous nature, interfacial compatibility, electrical conductivity, hold significant potential EMI Despite concerted the of been reported, this research area is still relatively new compared traditional In particular, a more comprehensive study summary factors influencing including pore structure adjustment, preparation process, micro-control would be valuable. The methods characteristics wood, bamboo, cellulose lignin in field are critically discussed paper, similar summarized analyzed. composite fillers various were reviewed. paper also highlights mechanism well existing prospects challenges for development trends field.

Язык: Английский

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Poly(vinyl alcohol)/polyacrylamide double‐network ionic conductive hydrogel strain sensor with high sensitivity and high elongation at break

Journal of Polymer Science, Год журнала: 2024, Номер 62(20), С. 4599 - 4611

Опубликована: Июль 19, 2024

Abstract As a soft material with biocompatibility and stimulation response, ionic conductive hydrogel‐based wearable strain sensors show great potential across wide spectrum of engineering disciplines, but their mechanical toughness is limited in practical applications. In this study, freeze‐thawing techniques were utilized to fabricate double‐network hydrogels poly(vinyl alcohol)/polyacrylamide (PVA/PAM) both covalent physical cross‐linking networks. These demonstrate excellent performance, an elongation at break 2253% tensile strength 268.2 kPa. Simultaneously, they also display high sensitivity (Gage factor, GF = 2.32 0%–200% strain), achieve rapid response time 368 ms without the addition extra fillers or ions, stable signal transmission even after multiple cycles, fast human motion detection.

Язык: Английский

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Recent progress on covalent organic frameworks and their composites as electrode materials for supercapacitors

Advanced Composites and Hybrid Materials, Год журнала: 2024, Номер 8(1)

Опубликована: Дек. 26, 2024

Язык: Английский

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Synchronous enhancement of safety protection and impact perception in intelligent leather

Advanced Composites and Hybrid Materials, Год журнала: 2025, Номер 8(1)

Опубликована: Янв. 21, 2025

High protection performance and intelligence are gradually becoming indispensable key factors with the ever-improving personal protective equipment. However, material that can not only resist but also percept full type of impacts is an urgent need due to complex combat scenarios. This work reports intelligent leather/shear stiffening gel (SSG)/Kevlar-shear thickening fluid (STF)/non-woven fabric (LSKSN) composite, which exhibits superior comprehensive impact resistance in needle puncture, knife ballistic impact, blunt impact. Especially, LSKSN composite improves puncture by 71% still maintains a large after being punctured. Moreover, possesses high limit penetrated velocity 159 m s−1 dissipate energy 24.6 J, causing bulletproof be improved 22%. Due excellent force-buffering rate-dependent dissipation characteristics wide-impact energy, maximum rate reaches 95%. Simultaneously, further developed electronic (E-LSKSN) shows outstanding perceptual capability, sensitive various accurately identify types through different changes (10–8000%) response times (0.1–100 ms). Finally, based on bending sensing properties E-LSKSN wireless signal transmission system constructed monitor safety movement status human body real-time, demonstrates this potential next generation

Язык: Английский

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High-performance PVA-based hydrogels for ultra-sensitive and durable flexible sensors

Advanced Composites and Hybrid Materials, Год журнала: 2025, Номер 8(1)

Опубликована: Янв. 25, 2025

Язык: Английский

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Manganous oxide-cobalt@carbon microcubes with a hierarchical mesoporous structure for high performance lithium storage

Advanced Composites and Hybrid Materials, Год журнала: 2024, Номер 7(4)

Опубликована: Июль 2, 2024

Язык: Английский

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Multifunctional MXenes nanocomposite platforms for biosensing and wearable sensor technologies

Advanced Composites and Hybrid Materials, Год журнала: 2024, Номер 8(1)

Опубликована: Дек. 20, 2024

Язык: Английский

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Stretchable Electronics: Advances in Elastic Conductive Fibers for Multifunctional Applications

Organic Electronics, Год журнала: 2024, Номер unknown, С. 107145 - 107145

Опубликована: Сен. 1, 2024

Язык: Английский

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Smart‐Adhesive, Breathable and Waterproof Fibrous Electronic Skins

Advanced Science, Год журнала: 2024, Номер unknown

Опубликована: Июль 25, 2024

For the need of direct contact with skin, electronic skins (E-skins) should not only fulfill electric functions, but also ensure comfort during wearing, including permeability, waterproofness, and easy removal. Herein, study has developed a self-adhesive, detach-on-demand, breathable, waterproof E-skin (PDSC) for motion sensing wearable by electrospinning styrene-isoprene block copolymer rubber carbon black nanosheets as layer liner copolymers N, N-dimethylacrylamide, n-octadecyl acrylate lauryl methacrylate adhesive layer. The high elasticity microfiber network structure endow PDSC good sensitivity linearity strain sensing. hydrophobic crystallizable ensures robust, waterproof, detaching-on-demand skin adhesion. Meanwhile, fiber enables air water permeability. integration functions endows great potential human activities both performances.

Язык: Английский

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