Abstract
By using the nanostructure and nanocomposites of shape memory polyurethane (PU), various stimulus-responsive polymer materials which can be actuated by heating, electric power, and water were prepared. For the electroactive shape memory polyurethane nanocomposites, poly(e-caprolactone) as soft segment and the functionalized carbon nanotubes(CNTs) were employed through chemical modification, grafting, surface coating, and cross-linking. The dominant enhancement in mechanical, thermal and shape memory properties were achieved in the sample of cross-linked nanocomposites of PU and CNTs. The water-triggered shape memory effect was obtained from the POSS-PU synthesized from poly(ethylene oxide) and POSS as hydrophilic and hydrophobic components in soft and hard segments, respectively. The actuation of these different stimulus-responsive polymer materials is demonstrated in this report.
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