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Smart Stimulus-Responsive Polymers Based on Shape Memory Polyurethane and its Nanocompopsites

Jae Whan Cho, R. N. Jana, Hye Jin Yoo

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(ε-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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References


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DOI: http://dx.doi.org/10.21535%2FProICIUS.2007.v3.597

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