Upcycling Hazelnut Shell and Cigarette Filter Wastes into a Dual-Mode Janus Bamboo Fabric for Radiative Cooling and Heating

Korkmaz Memiş N., Kaplan S.

ICONST 2026, Budapest, Macaristan, 1 - 03 Temmuz 2026, cilt.1, sa.1, ss.1-9, (Tam Metin Bildiri)

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Cilt numarası: 1
  • Basıldığı Şehir: Budapest
  • Basıldığı Ülke: Macaristan
  • Sayfa Sayıları: ss.1-9
  • Süleyman Demirel Üniversitesi Adresli: Evet

Özet

As global energy demand escalates and environmental concerns intensify, the development of sustainable passive radiative heating (PRH)/cooling (PRC) materials for personal thermal management has become increasingly popular. Although existing personal thermal regulating textiles with single PRC/PRH performance have been developed, they fall short of meeting the demands for sustainable and protective outdoor temperature management in varying environmental conditions. At this point, Janus-designed textiles represent a promising path toward integration of heating and cooling, offering dual functionality. Herein, a multifunctional layered Janus-treated bamboo fabric comprising of heating and cooling layers from upcycled waste materials was designed. The cooling side incorporates TiO₂ combined with cellulose acetate (CA) extracted from waste cigarette filters (TiO₂/CA), while the heating side employs carbonized hazelnut shell particles (CHS)/CA. In addition to chemical and morphological analyses with FT-IR and SEM, infrared emissivity and solar reflectivity/absorbance characteristics were measured using FT-IR and UV-VIS-NIR Spectrometers with integrating spheres, respectively for determining indirectly radiative cooling/solar heating performances. Radiative cooling/heating performances were characterized under simulated conditions using a designed hotplate system including sun simulator (500 W/m2). Owing to its asymmetric spectral properties, compared to the raw fabric, the cooling side achieved temperature reduction of 2.51°C with its enhanced solar reflectivity and thermal emittance, while the heating side attained a temperature increase of 3.26°C due to its photothermal conversion ability and enhanced solar absorptivity. Furthermore, Janus-treated bamboo fabric exhibited outstanding air and water vapor permeability, mechanical performance, and bending rigidity, confirming its suitability for clothing applications. These results demonstrate that waste-derived Janus functional textiles represent a promising, energy-free, and ecological strategy for personal thermal management.