Lyophobic and Magnetized MWCNTs-Based Nanofluidic System: High-Performance Damping Structure

Abstract

A high-performance damping structure was developed with lyophobic and magnetized multiwalled carbon nanotubes (MWCNTs)-based nanoporous composite and high surface tension liquids. The MWCNTs were surface treated by long-chain organic groups and decorated by ferroferric oxide (Fe 3 O 4 ) nanoparticles. According to the X-ray photoelectron spectroscopy (XPS) and X-ray diffraction (XRD) data, the grafting rate of organic groups and the decoration rate of ferroferric oxide were 5.56 and 1.13%, respectively. From the transmission electron microscope (TEM) and scanning electron microscopy (SEM) images, regular nanochannel structures and compact combination could be observed in the epoxy matrix. Pseudostatic and dynamic loading tests were performed. The results indicated that the MWCNT-based damping structure could achieve an infiltration pressure (yielding stress) up to 30 MPa, leading to a large energy dissipation capacity. © 2013 American Society of Civil Engineers.