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Large-Strain Transparent Magnetoactive Polymer NanocompositesA document discusses polymer nano - composite superparamagnetic actuators that were prepared by the addition of organically modified superparamagnetic nanoparticles to the polymer matrix. The nanocomposite films exhibited large deformations under a magnetostatic field with a low loading level of 0.1 wt% in a thermoplastic polyurethane elastomer (TPU) matrix. The maximum actuation deformation of the nanocomposite films increased exponentially with increasing nanoparticle concentration. The cyclic deformation actuation of a high-loading magnetic nanocomposite film was examined in a low magnetic field, and it exhibited excellent reproducibility and controllability. Low-loading TPU nanocomposite films (0.1-2 wt%) were transparent to semitransparent in the visible wavelength range, owing to good dispersion of the magnetic nanoparticles. Magnetoactuation phenomena were also demonstrated in a high-modulus, high-temperature polyimide resin with less mechanical deformation.
Document ID
20120009235
Acquisition Source
Glenn Research Center
Document Type
Other - NASA Tech Brief
Authors
Meador, Michael A.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
August 25, 2013
Publication Date
May 1, 2012
Publication Information
Publication: NASA Tech Briefs, May 2012
Subject Category
Man/System Technology And Life Support
Report/Patent Number
LEW-18752-1
Report Number: LEW-18752-1
Distribution Limits
Public
Copyright
Public Use Permitted.
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