Three-dimensional heterostructure of metallic nanoparticles and carbon nanotubes as potential nanofiller

Abstract

The effect of the dimensionality of metallic nanoparticle-and carbon nanotube-based fillers on the mechanical properties of an acrylonitrile butadiene styrene (ABS) polymer matrix was examined. ABS composite films, reinforced with low dimensional metallic nanoparticles (MNPs, 0-D) and carbon nanotubes (CNTs, 1-D) as nanofillers, were fabricated by a combination of wet phase inversion and hot pressing. The tensile strength and elongation of the ABS composite were increased by 39% and 6%, respectively, by adding a mixture of MNPs and CNTs with a total concentration of 2 wt%. However, the tensile strength and elongation of the ABS composite were found to be significantly increased by 62% and 55%, respectively, upon addition of 3-D heterostructures with a total concentration of 2 wt%. The 3-D heterostructures were composed of multiple CNTs grown radially on the surface of MNP cores, resembling a sea urchin. The mechanical properties of the ABS/3-D heterostructured nanofiller composite films were much improved compared to those of an ABS/mixture of 0-D and 1-D nanofillers composite films at various filler concentrations. This suggests that the 3-D heterostructure of the MNPs and CNTs plays a key role as a strong reinforcing agent in supporting the polymer matrix and simultaneously serves as a discrete force-transfer medium to transfer the loaded tension throughout the polymer matrix.

WITHDRAWN: Preparation of Silver Nanopowders and Its Application in Low Temperature Electrically Conductive Adhesive

“…Conductive llers provide conductive ability for ECA, so the performance of llers can greatly affect the conductive performance of the composites. The conductive llers of ECA are mainly include metal powders, graphite, carbon nanotubes [8][9][10][11][12][13][14]. The metal ller has good conductivity and usually include silver, copper, gold, chromium, nickel and lead-free alloy.…”

Titanium Nanobowl-Based Nest-Like Nanofiber Structure Prepared at Room Temperature and Pressure Promotes Osseointegration of Beagle Implants

“…Therefore, it is urgent to develop a simple, easier-to-operate, safe, and controllable method to prepare nest-like nanofiber structures with a higher binding force to the titanium substrate under room temperature and normal pressure. With the development of nanotechnology in recent years, it has been shown that nanoscale morphology can significantly expand a specific surface area ( Kim et al, 2012 ; Shin et al, 2016 ; Li et al, 2017 ; Ourari et al, 2019 ) to increase the chemical reaction rate ( Hou et al, 2018 ; Hamans et al, 2020 ; Zhang et al, 2020 ). Shin et al reported that 70-nm titanium nanoparticles can be etched in a KOH solution to prepare a titanium nest-like structure at room temperature, which is based on the mechanism of those nanoparticles that have a higher specific surface area ( Shin et al, 2016 ) and increase the effective contact area of KOH and TiO 2 and reduce the reaction temperature.…”