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Integrated thermal management-sensing-actuation functional artificial muscles.
Mater Horiz
November 2024
Key Laboratory of Mechanism Theory and Equipment Design of Ministry of Education, School of Mechanical Engineering, Tianjin University, 135 Yaguan Road, Tianjin, 300350, China.
Article Synopsis
- Electrothermal-driven polymer fiber-based artificial muscles are gaining attention for their affordability and high energy output but face limitations due to ineffective cooling methods, particularly for larger sizes.
- In this study, a new fluidic pump was developed using carbon nanotube electrodes, significantly enhancing cooling efficiency and allowing for quicker actuation and increased power density.
- The research also included integrating a sensing layer for better control of muscle actuation and showcased potential applications in advanced materials, flexible components, and bionic designs.
Electrothermal filamentation of igniting plasmas.
Phys Rev E
September 2024
Department of Physics, Atomic and Laser Physics sub-department, Clarendon Laboratory, University of Oxford, Parks Road, Oxford OX1 3PU, United Kingdom.
Dense, hot plasmas are susceptible to the electrothermal instability: a collisional process which permits temperature perturbations in electron currents to grow. It is shown here that linearizing a system comprised of two opposing currents and a mobile ion background as three distinct fluids yields unstable modes with rapid growth rates (∼10^{13}s^{-1}) for wavenumbers below a threshold k_{th}. An analytical threshold condition is derived, this being surpassed for typical hot-spot and shell parameters.
View Article and Find Full Text PDFUltrahigh Transparent Safety Film for Spectrally Selective Photo/Electrothermal Conversion via Surface-Enhanced Plasma Resonance Dynamics.
Nano Lett
September 2024
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, P. R. China.
Traditional deicing methods are increasingly insufficient for modern technologies like 5G infrastructure, photovoltaic systems, nearspace aerocraft, and terrestrial observatories. To address the challenge of combining anti-icing efficiency with operational performance, an innovative, spectrally selective, photo/electrothermic, ice-phobic film was prepared through a cost-effective mist deposition method. By manipulating the diameter ratio and density of nanowires, the local density of free electrons within this film is controlled to precisely dictate the position and intensity of surface plasmon resonance to achieve spectrally selective photo/electrothermal conversion.
View Article and Find Full Text PDFThe Macromolecular Design of Poly(styrene-isoprene-styrene) (SIS) Copolymers Defines their Performance in Flexible Electrothermal Composite Heaters.
ACS Appl Mater Interfaces
September 2024
Centre for Materials Science, Queensland University of Technology, Brisbane, Queensland 4000, Australia.
Electric cars are desirable for their environmental and economic benefits yet face limitations in range in cold weather due to the increased energy demands for cabin heating. To provide efficient heating for vehicles, flexible composite electrothermal heaters offer a viable solution owing to their lightweight design, efficiency, and adaptability for use within and beyond vehicle interiors. The current study aims to improve electrothermal heater stability and performance by understanding the impact of the polymer structure on composite properties.
View Article and Find Full Text PDFFlexible Grid Graphene Electrothermal Films for Real-Time Monitoring Applications.
Langmuir
April 2024
School of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, China.
Flexible electrothermal films are crucial for protecting equipment and systems in cold weather, such as ice blockages in natural gas pipelines and icing on aircraft wings. Therefore, a flexible electric heater is one of the essential devices in industrial operations. One of the main challenges is to develop flexible electrothermal films with low operating voltage, high steady-state temperature, and good mechanical stability.
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