TY - JOUR
T1 - Thermal driven self-healing infrared and heat shielding composites based on reversible Diels-Alder reaction
AU - Ouyang, Xin-Yi
AU - Wu, Wei
AU - Wang, Rui-Fang
AU - Duan, Qing-Shan
AU - Huang, Chong-Xing
AU - Liu, Yang
AU - Li, Robert K.Y.
AU - Zhao, Hui
PY - 2022/11
Y1 - 2022/11
N2 - Infrared and heat shielding materials have a wide range of applications in military infrared invisibility and thermal insulation for energy saving, but mechanical damage during use may reduce the service life. In this study, waterborne polyurethanes/gallium tin oxide (WPU/GTO) composites with good infrared and thermal shielding capabilities were fabricated after the introduction of GTO nanoparticles into the thermal driven self-healing WPU matrix. The results showed that the WPU/GTO composite films can show good healing efficiency through thermally reversible DA reactions, with a self-healing efficiency of 80 % in 30 min at 120 °C. In addition, the presence of GTO gives the composite good thermal shielding properties without affecting its thermal stability. Due to free carrier absorption and plasma reflection, the resulting composite films containing 1 wt% GTO could shield from approximately 95 % of infrared light, with an insulation temperature difference of 15 °C when compared to pure polyurethane. This work provides a feasible solution for the preparation of infrared and heat shielding materials with self-healing capabilities.
AB - Infrared and heat shielding materials have a wide range of applications in military infrared invisibility and thermal insulation for energy saving, but mechanical damage during use may reduce the service life. In this study, waterborne polyurethanes/gallium tin oxide (WPU/GTO) composites with good infrared and thermal shielding capabilities were fabricated after the introduction of GTO nanoparticles into the thermal driven self-healing WPU matrix. The results showed that the WPU/GTO composite films can show good healing efficiency through thermally reversible DA reactions, with a self-healing efficiency of 80 % in 30 min at 120 °C. In addition, the presence of GTO gives the composite good thermal shielding properties without affecting its thermal stability. Due to free carrier absorption and plasma reflection, the resulting composite films containing 1 wt% GTO could shield from approximately 95 % of infrared light, with an insulation temperature difference of 15 °C when compared to pure polyurethane. This work provides a feasible solution for the preparation of infrared and heat shielding materials with self-healing capabilities.
KW - Infrared shielding
KW - Self-healing
KW - Waterborne polyurethane
UR - http://www.scopus.com/inward/record.url?scp=85137166573&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85137166573&origin=recordpage
U2 - 10.1016/j.porgcoat.2022.107155
DO - 10.1016/j.porgcoat.2022.107155
M3 - RGC 21 - Publication in refereed journal
SN - 0300-9440
VL - 172
JO - Progress in Organic Coatings
JF - Progress in Organic Coatings
M1 - 107155
ER -
