Multi-cycle reversible control of gas permeability in thin film composite membranes via efficient UV-induced...

This communication presents a new, UV-induced mechanism to reversibly control the permeability of ultra-thin polymer coatings. Photoreversible [2+2] cycloaddition reactions were utilised to adjust the crosslinking degree and glass transition temperature of a coating. Consequently, a 300%, reversible change in the coating's oxygen permeability was achieved without loss of performance. Ultimately, the findings demonstrate the capability of using low UV doses to reversibly and efficiently regulate mass transport through ultra-thin coatings fabricated in a facile manner.