Asymmetric Design for a High‐Performance Indoor Radiative Heating Fabric. Issue 10 (30th March 2022)

• Record Type: Journal Article
• Authors: Boutghatin, Mohamed; Pennec, Yan; Djafari‐Rouhani, Bahram; Akjouj, Abdellatif; Gaucher, Valérie; Gidik, Hayriye; Assaf, Salim; Carette, Michèle; Thomy, Vincent
• Is Part Of: Advanced materials technologies. Volume 7:Issue 10(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-03-30
• Subjects: asymmetric fabric -- emissivity -- heating -- mid‐infrared -- thermal comfort; Materials science -- Periodicals; Technological innovations -- Periodicals; Materials science; Technological innovations; Periodicals; 620.1105
• DOI: 10.1002/admt.202101738
• Languages: English
• ISSNs: 2365-709X

Abstract

Abstract: Improving radiative heating performance of textiles is becoming one of the most current research topics to reduce the energy consumption used to control the indoor areas temperature. In this work, the properties of a textile‐based asymmetric design for radiative heating are studied both theoretically and experimentally, and its remarkable efficiency over a wide range of temperature is demonstrated. By sandwiching a thin metallic layer characterized by a high reflectivity in the mid‐infrared (MIR) between two polyethylene (PE) membranes of same thickness, it is proposed to control the MIR emissivity of the structure by the introduction of SiO2 nanoparticles (NPs) in one of the two PE membranes. By reversing the fabric side to side, a wide comfort zone can be achieved for medium and low ambient temperatures, typically between 7.1 and 16.3 ° C. Moreover, it is shown that, when transferred on a regular textile, the fabric performs the same functionalities. The experimental demonstration is done by considering an equivalent asymmetric structure with thicker membranes, without NPs. The fabrication and characterization processes are reported and a good agreement is obtained between the Fourier transform infrared spectra and the numerical data. Abstract : An asymmetric fabric is designed to control the temperature of the microclimate, the air space between the skin and the textile. The fabric consists of a thin gold (Au) layer sandwiched between two polyethylene membranes of same thickness, one of which contains SiO2 nanoparticles. Flipping the fabric side to side allows modulating the optical emissivity toward the outside, leading to the human body thermal comfort in medium and cold environment, from 7.1 to 16.3 °C.