Title

A Linear Actuation of Polymeric Nanofibrous Bundle for Artificial Muscles

RIS ID

32317

Publication Details

Gu, B. K., Ismail, Y. A., Spinks, G. Maxwell., Kim, S., So, I. Kim, S. (2009). A Linear Actuation of Polymeric Nanofibrous Bundle for Artificial Muscles. Chemistry of Materials, 21 (3), 511-515.

Abstract

Artificial muscle fiber mimicking myofibril is fabricated using electrospun nanofibers of high strength polyurethane followed by controlled in situ chemical polymerization with aniline. The resulting polyurethane(PU)/polyaniline(PANi) hybrid nanofibrous bundle consisting individual nanofibers of about 900 nm diameter responds to an electrical stimuli producing a linear actuation strain as high as 1.65% at an applied stress of 1.03 MPa in 1 M methane sulfonic acid (MSA), the highest strain produced in the nanofibers templated PANi. The hybrid nanofibrous bundle shows an electrical conductivity of about 0.5 S/cm and the electroactivity is imparted by PANi. The biomimetic artificial nanofibrous bundle shows work per cycle (W.C.) efficiency of above 75% for the electrochemical actuation even beyond 100 cycles. The PU/PANi hybrid nanofibrous bundle could be stably actuated without significant creep up to an applied load of 11 mN (2.263 Mpa) beyond which significant creep behavior appears.

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Link to publisher version (DOI)

http://dx.doi.org/10.1021/cm802377d