Abstract
The influence of multi-walled carbon nanotubes (MWCNT) on the structural dynamic behavior of MWCNT/epoxy nanocomposites was investigated. Two different types of MWCNTs, pristine MWCNT and functionalized MWCNT, were used in this study. Carboxylic acid-functionalized MWCNTs (MWCNT-COOH) were obtained by oxidation pristine MWCNTs via sonication in sulfuric-nitric acid and characterized by Fourier transform infrared spectroscopy (FTIR). Dynamic behaviors of the MWCNT reinforced nanocomposite including the natural frequency and damping ratio were determined using free vibration test. Experimental results showed that the damping ratio of the nanocomposite decreases with the increase of the MWCNT addition, while the natural frequency is increasing with the increase of the MWCNT addition. Functionalized MWCNTs improved the interfacial bonding between the nanotubes and epoxy resin resulting in the reduction of the interfacial energy dissipation ability and enhancement of the stiffness.
Highlights
IntroductionCarbon nanotubes (CNTs) exhibit a wide range of excellent mechanical, optical, and electrical properties along with chemical stability
The increasing demand for high-quality and multifunctional materials in different industrial applications have promoted huge research effort on the formulation and preparation of advancedMaterials 2013, 6 nanostructured composites with superior characteristics
The solution was sonicated in an ultransonic bath for 3 h at temperature of 50 °C to separate the aggregation of the multi-walled carbon nanotubes (MWCNT) and achieve good dispersion
Summary
Carbon nanotubes (CNTs) exhibit a wide range of excellent mechanical, optical, and electrical properties along with chemical stability. Electrical and thermal properties, CNTs are considered to be ideal for reinforcing high performance composites and enable the fabrication of composites with unique multi-functional characteristics. Lavorgna et al [19] investigated the effects of Silanization and silica enrichment of multi-walled carbon nanotubes on the thermal-mechanical properties of epoxy nanocomposites. Few have investigated the effect of nanotube functionalization on damping properties of polymeric composites [20]. Investigated the structural damping characteristics of polymeric composites containing carbon nanotubes with various kinds and amounts. Presented a multiscale model to investigate the effect of interfacial shear strength on the mechanical and damping properties of carbon nanotube reinforced composites. Free vibration test was conducted to determine the damping ratio and natural frequency of the nanocomposites
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
