Liquid Crystal Elastomers with Magnetic Actuation | Zendy

Winkler Moritz | Zendy; Kaiser Andreas | Zendy; Krause Simon | Zendy; Finkelmann Heino | Zendy; Schmidt Annette M. | Zendy

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Liquid Crystal Elastomers with Magnetic Actuation

Author(s) -

Winkler Moritz,

Kaiser Andreas,

Krause Simon,

Finkelmann Heino,

Schmidt Annette M.

Publication year - 2010

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.201050522

Subject(s) - liquid crystal , materials science , actuator , elastomer , superparamagnetism , magnetic field , artificial muscle , composite material , nanotechnology , condensed matter physics , nuclear magnetic resonance , optoelectronics , electrical engineering , magnetization , physics , quantum mechanics , engineering

Magneto‐active liquid crystal elastomers (LCEs) are accessible by the incorporation of superparamagnetic Fe 3 O 4 nanoparticles into oriented nematic side‐chain LCEs and offer a contactless activation pathway to the nematic‐to‐isotrope transition by local magnetic heating in external fields. In magneto‐mechanical measurements, a sample contraction of up to 30% is observed under field influence, with full reversibility when the field is switched off. The load evolved reaches 60 kPa and more. The ability of the materials to respond to a contactless electromagnetic stimulus with a well‐defined contraction can be of use for various actuator applications.

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