Abstract
The polyurethane composites dispersed with powders mixture of LaNi_5 hydrogen storage alloy (35vol% of LaNi_5) and Pd-Al_2O_3 catalyst powders were prepared by solution cast method. The unimorph sheet constructed with the driving polyurethane composite and supporting thin sheet with high specific stiffness was prepared to generate the bending strain of reversible up motions at horizontal direction,. The operation temperature dependent motion strain has been studied.