New focus of the cloud point/Krafft point of nonionic/cationic surfactants as thermochromic materials for smart windows

A nonionic poly(oxyethylene) monoalkyl ether (C-12(EO)(6)) and a cationic hexadecylpyridinium bromide (HPB) were used to achieve warm/cool transparency transition switchability, depending on the decrease in the hydration of the EO-headgroup of C-12(EO)(6) above the cloud point (T-c) and the crystallization of HPB below the Krafft point (T-k). The liquid state shows the advantage of being free-flowing, frost-resistance, flexible-adjustment and solar-energy-storing-capability due to the moisture-rich characteristics, while the hydrogel state exhibits free-standing properties.

Automated summary

Nonionic poly(oxyethylene) monoalkyl ether and cationic hexadecylpyridinium bromide were used to achieve transparency transition between warm and cool states. The liquid state has the advantages of free-flowing, frost resistance, flexible adjustment and solar energy storage capability due to its moisture-rich characteristics, while the hydrogel state exhibits free-standing properties.