Thermally responsive co-polymer coating for adaptive solar control

This paper introduces a simple, robust and inexpensive method to create a thermal responsive coating for glass. The coating is a copolymer of N‑isopropylacrylamide (NIPAAm) and acrylamide (AAm), which can switch between clear and opaque states reversibly. The switching temperature can be adjusted from 32°C to 40°C by varying the percentage of acrylamide. The coating remains stable after switching 30 times and possesses switching function after six months storage at room temperature. These advanced properties enable the smart coating to be suitable for privacy and solar adaptive control.