Comparative analysis of electric, magnetic, and mechanical properties of epoxy matrix composites with different contents of multiple walled carbon nanotubes

2007 ◽  
Vol 28 (5) ◽  
pp. 612-617 ◽  
Author(s):  
D. Zilli ◽  
S. Goyanes ◽  
M. M. Escobar ◽  
C. Chiliotte ◽  
V. Bekeris ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Comparative Analysis ◽  
Epoxy Matrix ◽  
Matrix Composites ◽  
Walled Carbon Nanotubes

Remarkable Mechanical and Thermal Increments of Epoxy Composites by Graphene Nanosheets and Carbon Nanotubes Synergetic Reinforcement

2017 ◽  
Vol 727 ◽  
pp. 546-552
Author(s):  
Xia Jun Wang ◽  
Dong Lin Zhao ◽  
Dong Dong Zhang ◽  
Cheng Li ◽  
Ran Ran Yao
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Nanotubes ◽  
Epoxy Matrix ◽  
Graphene Nanosheets ◽  
Synergetic Effect ◽  
Epoxy Composites ◽  
Matrix Composites ◽  
Conductivity Enhancement ◽  
Hybrid Fillers

Graphene nanosheets (GNSs) were modified with aqueous ammonia and hydrogen peroxide, to obtain amine (–NH2) functionalized GNSs (AFGNSs) and enhance the bondings between the GNSs and epoxy matrix. We report an easy and efficient approach to improve the mechanical properties and thermal conductivity of epoxy matrix composites by combining one dimensional multi-walled carbon nanotubes and two dimensional AFGNSs. The long and tortuous MWCNTs can bridge adjacent AFGNSs and inhibit their aggregation, resulting in an increased contact surface area between GNS/MWCNT structures and the polymer. A remarkable synergetic effect between the GNSs and MWCNTs on the enhanced mechanical properties and thermal conductivity of the epoxy composites was demonstrated. The addition of 2 wt.% MWCNT-GNS hybrid fillers improved the tensile strength and flexural strength of the pristine epoxy by 20.71% and 55.51%, respectively. Thermal conductivity increased by 93.71% using MWCNT-GNS hybrid fillers compared to non-derivatised epoxy. This study has demonstrated that 2-D GNSs and 1-D MWCNTs have an obvious synergetic reinforcing effect on the mechanical properties and a remarkable thermal conductivity enhancement in epoxy composites which provides an easy and effective way to design and improve the properties of composite materials.

scholarly journals Functionalization of Multi-Walled Carbon Nanotubes Via UV/O3 and Silane Treatments

2007 ◽  
Vol 334-335 ◽  
pp. 797-800
Author(s):  
Peng Cheng Ma ◽  
Jang Kyo Kim ◽  
Ben Zhong Tang
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Epoxy Matrix ◽  
Covalent Bonding ◽  
Combined Process ◽  
Chemical Functionalization ◽  
Multi Walled Carbon Nanotubes ◽  
Ft Ir ◽  
Walled Carbon Nanotubes ◽  
Matrix Nanocomposites

This paper presents a method for chemical functionalization of CNTs through the combined process of UV/O3 treatment and silanization process. FT-IR and TEM were employed to characterize the changes in surface functionalities and morphology. The results indicate improved dispersion and attachment of silane molecules on the surface of CNTs. Epoxy matrix nanocomposites containing functionalized CNTs showed much better dispersion with associated higher mechanical properties than those without functionalization. These findings confirmed the improved interfacial interactions due to covalent bonding between the functionalized CNTs and epoxy resin.

scholarly journals Effect of the Nanotube Radius and the Volume Fraction on the Mechanical Properties of Carbon Nanotube-Reinforced Aluminum Metal Matrix Composites

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3947
Author(s):  
Myung Eun Suk
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Fracture Strain ◽  
Volume Fraction ◽  
Strain Curve ◽  
Matrix Composites ◽  
Strength And Stiffness ◽  
Walled Carbon Nanotubes

By using the advantages of carbon nanotubes (CNTs), such as their excellent mechanical properties and low density, CNT-reinforced metal matrix composites (MMCs) are expected to overcome the limitations of conventional metal materials, i.e., their high density and low ductility. To understand the behavior of composite materials, it is necessary to observe the behavior at the molecular level and to understand the effect of various factors, such as the radius and content of CNTs. Therefore, in this study, the effect of the CNT radius and content on the mechanical properties of CNT-Al composites was observed using a series of molecular dynamics simulations, particularly focusing on MMCs with a high CNT content and large CNT diameter. The mechanical properties, such as the strength and stiffness, were increased with an increasing CNT radius. As the CNT content increased, the strength and stiffness increased; however, the fracture strain was not affected. The behavior of double-walled carbon nanotubes (DWNTs) and single-walled carbon nanotubes (SWNTs) was compared through the decomposition of the stress–strain curve and observations of the atomic stress field. The fracture strain increased significantly for SWNT-Al as the tensile force was applied in the axial direction of the armchair CNTs. In the case of DWNTs, an early failure was initiated at the inner CNTs. In addition, the change in the elastic modulus according to the CNT content was predicted using the modified rule of mixture. This study is expected to be useful for the design and development of high-performance MMCs reinforced by CNTs.

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