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Journal of Nanomaterials
Volume 2015 (2015), Article ID 475316, 8 pages
http://dx.doi.org/10.1155/2015/475316
Research Article

Epoxy Resin Composite Bilayers with Triple-Shape Memory Effect

1Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China
2Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda 386-8576, Japan

Received 28 April 2015; Revised 9 July 2015; Accepted 4 August 2015

Academic Editor: Bin Li

Copyright © 2015 Xixi Li et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Triple-shape memory epoxy composites with bilayer structures of well-separated glass transition temperatures have been successfully prepared. The different glass transition temperatures of the epoxy composites were obtained by physically incorporating various amounts of nanosilica particles, which were introduced into the epoxy by utilizing polyethylene glycol. A scanning electron microscope and a transmission electron microscope were used to analyze the dispersibility of the nanosilica particles. The effects of nanosilica particles on the mechanical properties as well as on the dual-shape memory effects (DSME) and triple-shape memory effects (TSME) of the nanocomposites were studied. The nanosilica particles were homogenously dispersed in the matrix and well incorporated into the epoxy matrix. The resulting nanocomposites exhibited excellent TSME, and their shape fixity properties were significantly improved by nanosilica particles.