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Issue 8, 2011
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Study of electroactive shape memory polyurethane–carbon nanotube hybrids

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Abstract

A low temperature electroactive shape-memory material, PU–SWCNT hybrid, was prepared by blending the low molecular weight soft segment polyurethane (PU) with the high conductivity single-walled carbon nanotubes (SWCNTs). The melting points of PU–SWCNT hybrids were changed clearly with the amount of SWCNTs, which were evidently observed by a differential scanning calorimeter (DSC). The influence of the SWCNT contents on the crystal structure of the PU–SWCNTs was detected by X-ray diffraction spectrometer and a hydrogen-bond reconstructed model was proposed in this study. The properties of the PU–SWCNT hybrids are characterized by thermogravimetric analysis (TGA), four-point probe and scanning electron microscopy (SEM). The extent of electroactive shape memory effect for the PU–SWCNT hybrids is strongly affected by the added content of SWCNTs. A good shape recovery of 88% could be obtained using PU–SWCNT hybrids containing 4% SWCNTs. That is, when 30 V was applied to the sample at 5 °C, the shape recovery time would only be 90 seconds.

Graphical abstract: Study of electroactive shape memory polyurethane–carbon nanotube hybrids

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Publication details

The article was received on 05 Oct 2010, accepted on 31 Jan 2011 and first published on 24 Feb 2011


Article type: Paper
DOI: 10.1039/C0SM01101K
Soft Matter, 2011,7, 3801-3807

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    Study of electroactive shape memory polyurethane–carbon nanotube hybrids

    H. Lee and H. H. Yu, Soft Matter, 2011, 7, 3801
    DOI: 10.1039/C0SM01101K

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