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Shape‐Memory Polyurethane Nanocomposites with Single Layer or Bilayer Oleic Acid‐Coated Fe 3 O 4 Nanoparticles
Author(s) -
Zou Hua,
Weder Christoph,
Simon Yoan C.
Publication year - 2015
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201500079
Subject(s) - materials science , nanocomposite , thermoplastic polyurethane , oleic acid , bilayer , polyurethane , shape memory alloy , nanoparticle , composite material , layer (electronics) , casting , chemical engineering , nanotechnology , elastomer , biochemistry , chemistry , membrane , biology , engineering , genetics
The present study aimed at developing a shape‐memory material, whose shape can be changed “on demand” upon application of an external magnetic field. Shape‐memory nanocomposites were thus prepared from a commercially available thermoplastic polyurethane (PU) with a “switching temperature” of ≈40 °C and oleic acid (OA)‐coated Fe 3 O 4 nanoparticles (NPs). Two series of PU/Fe 3 O 4 nanocomposite films based on the shape‐memory PU and single layer or bilayer OA‐coated Fe 3 O 4 NPs were prepared by solution mixing followed by solvent casting. The thermal, mechanical, and shape‐memory properties of the nanocomposite films were studied and compared.