Multiscale Hybrid Micro‐Nanocomposites Based on Carbon Nanotubes and Carbon Fibers

Abstract

Amino-modified double wall carbon nanotube (DWCNT-NH2)/carbon fiber (CF)/epoxy hybrid micro-nanocomposite laminates were prepared by a resin infusion technique. DWCNT-NH2/epoxy nanocomposites and carbon fiber/epoxy microcomposites were made for comparison. Morphological analysis of the hybrid composites was performed using field emission scanning electron microscope. A good dispersion at low loadings of carbon nanotubes (CNTs) in epoxy matrix was achieved by a bath ultrasonication method. Mechanical characterization of the hybrid micro-nanocomposites manufactured by a resin infusion process included three-point bending, mode I interlaminar toughness, dynamic mechanical analysis, and drop-weight impact testing. The addition of small amounts of CNTs (0.025, 0.05, and 0.1 wt%) to epoxy resins for the fabrication of multiscale carbon fiber composites resulted in a maximum enhancement in flexural modulus by 35%, a 5% improvement in flexural strength, a 6% improvement in absorbed impact energy, and 23% decrease in the mode I interlaminar toughness. Hybridization of carbon fiber-reinforced epoxy using CNTs resulted in a reduction in and dampening characteristics, presumably as a result of the presence of micron-sized agglomerates.

The production of advanced fine-grained alumina by carbon nanotube addition

“…Such results were previously only possible when very high pressures (1)(2)(3)(4)(5)(6)(7)(8) were used during the sintering of alumina [46][47][48][49]. For example, Liao et al [49] applied 8 GPa pressure during conventional lengthy sintering process to produce a microstructure having a mean grain size of 50 nm using 18 nm starting powder alumina.…”

“…Since Iijima's report [1], CNTs have been widely appreciated for producing advanced polymer [2,3], ceramic [4,5] and metal [6] composites. In the case of ceramic matrix composites (CMCs) [7], CNTs have been reported to improve the electrical conductivity [4,5], thermal conductivity [8], fracture strength [5] machinability [9], indentation fracture toughness [10], and contact damage resistance [11].…”

Modeling and Simulation of Graphene Based Polymer Nanocomposites: Advances in the Last Decade

“…From Equation (10) and Equation (12), the bond length in terms of Green-Lagrange strain tensor is given by Equation (14) and Equation (15) [50],…”

“…The first manufactured PMCs used glass fibers as reinforcement. Besides glass fibers, some frequently used reinforcements include metallic oxides [2]- [4], clays [5]- [7], Carbon Nanotubes (CNTs) [8]- [10], and other carbonaceous materials [11]- [13]. The trends of the use of various reinforcements in the last decade are shown in Figure 2.…”

INFLUENCE OF CARBON NANOTUBE REINFORCED TiO2- Al2O3 COATING MIXTURE ON AISI 1020 SURFACE PERFORMANCE

“…12 As reported in literatures, bond coating posses' severe functionality issues which is attributed to differential thermal expansion coefficient prevailing between the substrate and coating materials. 13 In case of substrate and Al2O3 and TiO2 coating mixture, it is imperative to ensure match of thermal expansion between coating and substrate layers. Nevertheless, it has to be ensured that bond coatings are typically thinner than main coatings.…”