Abstract
A water absorption sheet containing fine-grained ionized poly (N-isopropylacrylamide) gels, as absorption materials was prepared, and its absorption and discharge properties were examined. The gels underwent the volume phase transition from a swollen state to a shrunk state at its phase transition temperature. The sheet absorbed water below the phase transition temperature and discharged above the temperature. Ambient humidity did not affect the discharge. Even in high humidity, the sheet discharged water held in the sheet when temperature was increased above the transition temperature. The function of absorption and discharge was not lost by repetition. The sheet is reusable.
