Ms. Alice De Corte Profile

Alice De Corte

at Univ de Mons

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Proceedings Article | 24 May 2022 Presentation + Paper

Dual-mode photonic textiles for radiative heat management

Muluneh Abebe, Alice De Corte, Gilles Rosolen, Bjorn Maes

Proceedings Volume 12150, 1215006 (2022) https://doi.org/10.1117/12.2620973

KEYWORDS: Polymers, Infrared radiation, Scattering, Skin, Reflectivity, Transmittance, Dielectrics, Shape memory polymers, Plasmonics, Switching

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Personal radiative heat regulation by photonic engineered textiles can help contribute to a more sustainable cooling and heating energy consumption in buildings by expanding the range of comfortable ambient conditions. Here, we propose various dual-mode photonic fabric designs (dynamic and static) that provide thermal regulation in both cold and hot environments. In the first design, we utilize metal-coated monofilaments arranged in a hexagonal geometry within a yarn and stimuli-responsive polymer actuator beads, in this way benefiting from the infrared (IR) photonic effect (or plasmonic gap) to control the wide-band transmission of thermal radiation and to provide for a sharp, dynamic response (Δτ = 0.9). The second design is based on metal microspheres randomly dispersed in a shape memory polymer membrane. The dynamic switching is achieved via a shape memory polymer matrix that responds to environmental changes. This design capitalizes on the strong scattering properties of metallic microspheres, leading to a strong modulation of reflectance (Δρ = 0.55) as a function of the volume fraction. The third design is a Janus-yarn fabric composed of an asymmetric structure, leading to dual emissivity characteristics. The strong emissivity contrast (Δε = 0.72 ) is achieved by utilizing metallic and dielectric fibers within the yarn; here, static switching is achieved via fabric flipping.

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