Highly Porous Yet Transparent Mechanically Flexible Aerogels Realizing Solar-Thermal Regulatory Cooling

• DOI: 10.1007/s40820-024-01356-x
• Publication Date: 2024-02-26T18:04:53Z
• Authors: Meng Lian; Wei Ding; Song Liu; Yufeng Wang; Tianyi Zhu; Yue-E. Miao; Chao Zhang; Tianxi Liu
• Keywords: Technology; Transparent aerogel; T; Delaminated gelation; Passive daytime radiative cooling; Thermal insulation; 01 natural sciences; Cellulose nanofiber aerogel; Article; 0104 chemical sciences

The demand for highly porous yet transparent aerogels with mechanical flexibility and solar-thermal dual-regulation energy-saving windows is significant but challenging. Herein, a delaminated aerogel film (DAF) fabricated through filtration-induced gelation ambient drying. process involves the assembly of fluorinated cellulose nanofiber (FCNF) at solid-liquid interface between filter filtrate during filtration, resulting in formation lamellar FCNF hydrogels strong intra-plane weak interlayer hydrogen bonding. By exchanging solvents from water to hexane, bonding hydrogel further enhanced, enabling DAF intra-layer mesopores upon lightweight ultra-flexible, which possesses desirable properties high visible-light transmittance (91.0%), low thermal conductivity (33 mW m