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

Published: April 21, 2025

Abstract Effective heat dissipation is critical for high‐power modules amid increasing demands compact, lightweight, and high‐performance electronic devices. This study presents a passive cooling strategy employing type of hierarchical resin‐free coating (HRC) on the etched surfaces pipe radiator modules. The HRC consists graphene‐hybridized hexagonal boron nitride ( h ‐BN) nanosheet networks fabricated via scalable three‐step chemical etching substrate, ball‐milling exfoliation, silane coupling process. It achieves an infrared emissivity 0.97, owing to strong phonon vibrations within 2D nanosheets localized surface plasmon resonance from micro/nanostructures which induce electromagnetic field polarization, as confirmed by numerical simulation. Heat performance coated with HRC, compared uncoated one, apparently improved due enhanced radiative cooling. Experimental results demonstrate that coatings, relative yields 3.1–9.9 °C temperature reduction at air velocities 1–5 m s −1 decrease total thermal resistance up 16.7% under 1.5 kW load. work provides new design concept environmentally friendly, highly efficient, sustainable management solutions in

Language: Английский