Magnetically-sensitive shape memory polyurethane composites crosslinked with multi-walled carbon nanotubes |
| |
| Affiliation: | 1. Department of Physics, Center for Functional Nanomateriels and Devices, East China Normal University, Shanghai 200241, PR China;2. Shanghai Institute of Ceramics, Chinese Academy of Science, Shanghai 200050, PR China;3. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, PR China;1. School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China;2. Worcester Polytechnic Institute, Worcester, MA 01605, USA;1. Science and Technology on Advanced Composites in Special Environments Laboratory, Harbin Institute of Technology, Harbin 150080, China;2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore 639798, Singapore;1. Radiation Technology Center, Atomic Energy Research Institute, King Abdulaziz City for Science and Technology (KACST), PO Box 6086, Riyadh 11442, Saudi Arabia;2. Polymer Chemistry Department, National Center for Radiation Research and Technology, Atomic Energy Authority, PO Box 29, Nasr City, Cairo, Egypt |
| |
| Abstract: | Magnetically-sensitive polyurethane composites, which were crosslinked with multi-walled carbon nanotubes (MWCNTs) and were filled with Fe3O4 nanoparticles, were synthesized via in situ polymerization method. MWCNTs pretreated with nitric acid were used as crosslinking agents. Because of the crosslinking of MWCNTs with polyurethane prepolymer, the properties of the composites with a high content of Fe3O4 nanoparticles, especially the mechanical properties, were significantly improved. The composites showed excellent shape memory properties in both 45 °C hot water and an alternating magnetic field (f = 45 kHz, H = 29.7 kA m?1). The shape recovery time was less than one minute and the shape recovery rate was over 95% in the alternating magnetic field. |
| |
| Keywords: | A Nano-structures A Polymer–matrix composites (PMCs) B Magnetic properties B Mechanical properties |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
