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Updated: Jun 23, 2026

Pool-Boiling Heat-Transfer Enhancement on Cylindrical Surfaces with Hybrid Wettable Patterns
Published on: April 10, 2017
Heterogeneous interfacial polarization domain engineering toward lightweight skins with microwave absorption and
Chenchen Wang1, Jun Ouyang1, Chuanshuang Hu1
1College of Future Biomass, South China Agricultural University, 483 Wushan Road, Guangzhou 510642, China.
None:
Outdoor wireless communication, environmental monitoring, and intelligent sensing devices have imposed increasingly stringent requirements on materials capable of simultaneously mitigating electromagnetic interference and solar-induced thermal accumulation. Here, a BaTiO3 (BTO)/kaolin/PVDF (FKBTO) electrospun film is developed based on a heterogeneous interfacial polarization-domain regulation strategy, enabling the integration of electromagnetic wave absorption (EMWA) and passive daytime radiative cooling (PDRC) within a single surface-deployable dielectric platform. Electrospinning-induced β-phase enrichment in PVDF, together with kaolin nanosheets and BTO nanoparticles, generates abundant heterogeneous interfaces and defect-related polarization centers, cooperatively activating dipolar, interfacial, and space-charge relaxation while maintaining favorable impedance matching. As a result, the optimized FKBTO-55 film achieves an ultralow reflection loss of -56.24 dB at a thickness of 4.0 mm. Simultaneously, it delivers efficient PDRC with a maximum temperature reduction of 12.73 °C. This work establishes a generalizable polarization-domain regulation paradigm for multifunctional dielectric skins toward coupled electromagnetic protection and solar-thermal management.
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