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Issue 33, 2013
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Graphene-crosslinked polyurethane block copolymer nanocomposites with enhanced mechanical, electrical, and shape memory properties

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Abstract

Highly flexible, conductive, and shape memory polyurethane nanocomposites were prepared using a robust and fast process. Functionalized graphene sheets were incorporated as crosslinkers in the prepolymer, prepared from a reaction of 4,4′-methylene bis(phenyl isocyanate) and poly(ε-caprolactone)diol. The covalently bonded graphene sheets were homogeneously dispersed in the polymer matrix. In comparison to pristine polyurethane and carbon nanotube-crosslinked polyurethane, the graphene-crosslinked polyurethane composite exhibited higher modulus and breaking stress, and exceptional elongation-at-break. The resulting composite exhibited 97% shape recovery, 95% shape retention, enhanced shape recovery force, and fast electroactive shape recovery rate, thus it could be a promising material for the fabrication of graphene-based actuating devices.

Graphical abstract: Graphene-crosslinked polyurethane block copolymer nanocomposites with enhanced mechanical, electrical, and shape memory properties

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Article information


Submitted
08 Feb 2013
Accepted
03 Jun 2013
First published
03 Jun 2013

RSC Adv., 2013,3, 13796-13803
Article type
Paper

Graphene-crosslinked polyurethane block copolymer nanocomposites with enhanced mechanical, electrical, and shape memory properties

S. Rana, J. W. Cho and L. P. Tan, RSC Adv., 2013, 3, 13796
DOI: 10.1039/C3RA40711J

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