| Autor: |
Tang R; Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China., Chen T; Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China., Jian W; Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China., Law WC; Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hong Kong, China., Chow CL; Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China., Lau D; Department of Architecture and Civil Engineering, City University of Hong Kong, Hong Kong, China. |
| Abstrakt: |
In this investigation, transparent photothermal coatings utilizing plasmonic copper chalcogenide (Cu 2- x S) nanoparticles were designed and fabricated for the deicing of glass surfaces. Cu 2 - x S nanoparticles, chosen for their high near-infrared (NIR) absorption and efficient photothermal conversion, were analyzed via finite difference time domain (FDTD) simulations to optimize nanoparticle morphology, thus avoiding costly trial-and-error synthesis. FDTD simulations determined that Cu 2- x S nanorods (Cu-NRs) with an optimal aspect ratio of 2.2 had superior NIR absorption. Guided by FDTD simulations, the composite coating composed of Cu-NRs in clear acrylic resin paint was brush-coated to glass, achieving 62.4% visual transmittance and over 95% NIR absorbance. Photothermal conversion tests exhibited a significant temperature increase, with the coating reaching 65 °C under NIR irradiation within 6 min. The dynamic deicing process of ice beads on the coating at -20 °C completed within 220s, in contrast to the frozen state on glass coated with clear acrylic resin paint. Furthermore, heat transfer simulations in COMSOL illustrated melting initiation at the ice-coating interface and subsequent progression through the ice layer. This simulation-driven synthesis method and photothermal testing offer a design framework for the fabrication of photothermal deicing coatings with applications for automobiles, buildings, and aircraft in cold environments. |
