Hierarchically Structured Composite Decorated with Core‐Sheath CoC@Carbon Fiber Felt: Exceptional Electromagnetic Interference Shielding and Applications in Thermal Management and Electro/Photo‐Thermal Conversion

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 21, 2025

Abstract In the microelectronics era, electromagnetic radiation and heat accumulation in electronic devices are urgent challenges requiring solutions, particularly through use of structure‐function integrated lightweight materials for interference (EMI) shielding thermal management. Hierarchically structured polyether‐ether‐ketone‐based composites prepared this study by situ deposition dip coating using a simple scalable method. Magnetic cobalt nanoparticles derived from magnetic metal–organic frameworks deposited on carbon fiber felt featuring macroscopic continuous conductive network. Next, hybrid slurry is applied to connect isolated fibers, which bridge gaps create new electron phonon transport channels, increasing conductivity (23.43 W m −1 K plane, 4.84 plane) efficient dissipation. Owing stable 3D crosslinked network with high electrical (13 608 S ), composite offers ultra‐high EMI X‐band (101.64 dB stability extreme environments), excellent Joule heating performance (220 °C at 4 V), photothermal conversion (94 500 mW cm −2 ). This multifunctional material has great application prospects precision equipment.

Language: Английский

Patterned Design of the Electric Heating Element Achieves Efficient Joule Heating

Advanced Engineering Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 29, 2025

Electric heating technology is critical for aerospace de‐icing systems due to its efficiency and controllability. However, traditional electric elements such as resistance wires metal coatings have low thermal conductivity, poor high‐temperature resistance, insufficient structural flexibility, which severely limit their application in composites. This study introduces carbon nanotube (CNT)/nanocellulose fiber (CNF) composite films a solution. CNTs, with exceptional stability, mechanical strength, enhance efficiency. Through the patterned design, further optimized, heat distribution during process made more uniform. Experimental results show that when mass ratio of CNTs CNFs 10:1, conductivity material reaches 2.68 W/(m·K), it exhibits significant Joule effect. When power density 0.4 W cm −1 2 , CNTs/CNFs (10:1) film can rapidly reach 140.6 °C after 10 s heating. Additionally, use fiber‐reinforced composites improves durability system, allowing system operate stably under high‐frequency cycles, significantly enhancing reliability service life. high capability allows rapid local temperature elevation, reducing energy consumption boosting

Language: Английский

Design and construction of interface engineering in short carbon fiber composites for excellent mechanical properties and efficient electromagnetic interference shielding

Applied Surface Science, Journal Year: 2024, Volume and Issue: unknown, P. 162098 - 162098

Published: Dec. 1, 2024

Language: Английский