title: High Performance Shape Memory Epoxy/Carbon Nanotube Nanocomposites.
abstract: A series of shape memory nanocomposites based on diglycidyl ether of bisphenol A (DGEBA) E51/methylhexahydrophthalic anhydride (MHHPA)/multiwalled carbon nanotube (MWCNT) with various stoichiometric ratios (rs) of DGEBA/MHHPA from 0.5 to 1.2 and filler contents of 0.25 and 0.75 wt % are fabricated. Their morphology, curing kinetics, phase transition, mechanical properties, thermal conduction, and shape memory behaviors are systematically investigated. The prepared materials show a wide range of glass transition temperatures (Tg) of ca. 65-140 °C, high flexural modulus (E) at room temperature up to ca. 3.0 GPa, high maximum stress (σm) up to ca. 30 MPa, high strain at break (εb) above 10%, and a fast recovery of 32 s. The results indicate that a small amount of MWCNT fillers (0.75 wt %) can significantly increase all three key mechanical properties (E, σm, and εb) at temperatures close to Tg, the recovery rate, and the repetition stability of the shape memory cycles. All of these remarkable advantages make the materials good candidates for the applications in aerospace and other important fields.
authors.affiliation: School of Engineering and Technology, China University of Geosciences (Beijing) , Beijing 100083, China.|CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Yayun
authors.initials: Y
authors.lastname: Liu
authors.affiliation: CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Zhao
authors.affiliation: CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology , Beijing 100190, China.|Academy for Advanced Interdisciplinary Studies, Peking University , Beijing 100871, China.|University of Chinese Academy of Science , Beijing 100049, China.
authors.forename: Lingyu
authors.initials: L
authors.lastname: Zhao
authors.affiliation: CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology , Beijing 100190, China.|University of Chinese Academy of Science , Beijing 100049, China.
authors.forename: Weiwei
authors.initials: W
authors.lastname: Li
authors.affiliation: CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Technology, China University of Geosciences (Beijing) , Beijing 100083, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Yu
authors.affiliation: CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology , Beijing 100190, China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Zhang
keywords: carbon nanotube; curing; epoxy; nanocomposite; shape memory polymer