TY - JOUR
T1 - Bio-based and fireproof radiative cooling aerogel film
T2 - Achieving higher sustainability and safety
AU - Cai, Wei
AU - Lin, Bicheng
AU - Qi, Liangyuan
AU - Cui, Tianyang
AU - Li, Zhaoxin
AU - Wang, Junling
AU - Li, Sicheng
AU - Cao, Chengfei
AU - Ziaur Rahman, Mohammad
AU - Hu, Xin
AU - Yu, Rujun
AU - Shi, Shuo
AU - Xing, Weiyi
AU - Hu, Yuan
AU - Zhu, Jixin
AU - Fei, Bin
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/5/15
Y1 - 2024/5/15
N2 - Even though significant advantages in the energy-free regulation of temperature are presented, the practical applications of radiative cooling materials in buildings and human surfaces still involve many safety issues, especially for fire hazards of polymer-based materials. Meanwhile, renewable and environmentally friendly materials are urgently needed to develop suitable radiative cooling materials with no adverse environmental impact. Herein, a chitosan-derived composite aerogel film with high solar reflection provided by the addition of melamine-phytic acid (MA/PA) hybrids is designed and prepared, presenting radiative cooling and fireproof performances. The instinct deep-yellow color of chitosan (CS) is successfully shielded by high-reflective MA/PA hybrids, while IR emissivity of up to 90.4 % and solar reflectivity of ∼ 89.3 % are achieved. In outdoor environments, this composite aerogel shows sub-ambient temperature drops of ∼ 4.3 °C and ∼ 3.1 °C in cloudless and cloudy weather, presenting a robust cooling effect. In addition, CS-MA/PA composite aerogel film with 3 mm thickness can isolate the fire of ∼ 500 °C, showing superior fire safety attributed to the synergistic flame retardant effects among chitosan, phytic acid, and melamine, which suppress the initial growth of fire and promote the rapid formation of protective char layer. This work provides a bio-based, fire-safe, and radiative cooling material to decrease the energy consumption of temperature regulation with a more environmentally friendly and safer approach, further promoting the practical application of radiative cooling materials.
AB - Even though significant advantages in the energy-free regulation of temperature are presented, the practical applications of radiative cooling materials in buildings and human surfaces still involve many safety issues, especially for fire hazards of polymer-based materials. Meanwhile, renewable and environmentally friendly materials are urgently needed to develop suitable radiative cooling materials with no adverse environmental impact. Herein, a chitosan-derived composite aerogel film with high solar reflection provided by the addition of melamine-phytic acid (MA/PA) hybrids is designed and prepared, presenting radiative cooling and fireproof performances. The instinct deep-yellow color of chitosan (CS) is successfully shielded by high-reflective MA/PA hybrids, while IR emissivity of up to 90.4 % and solar reflectivity of ∼ 89.3 % are achieved. In outdoor environments, this composite aerogel shows sub-ambient temperature drops of ∼ 4.3 °C and ∼ 3.1 °C in cloudless and cloudy weather, presenting a robust cooling effect. In addition, CS-MA/PA composite aerogel film with 3 mm thickness can isolate the fire of ∼ 500 °C, showing superior fire safety attributed to the synergistic flame retardant effects among chitosan, phytic acid, and melamine, which suppress the initial growth of fire and promote the rapid formation of protective char layer. This work provides a bio-based, fire-safe, and radiative cooling material to decrease the energy consumption of temperature regulation with a more environmentally friendly and safer approach, further promoting the practical application of radiative cooling materials.
KW - Bio-Based Materials
KW - Fire Safety
KW - Flame Retardant Mechanism
KW - Radiative Cooling
UR - http://www.scopus.com/inward/record.url?scp=85189138204&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2024.150784
DO - 10.1016/j.cej.2024.150784
M3 - Journal article
AN - SCOPUS:85189138204
SN - 1385-8947
VL - 488
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 150784
ER -