scholarly journals Impact Strengthening of Laminated Kevlar/Epoxy Composites by Nanoparticle Reinforcement

Polymers ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 2814
Author(s):  
Abdel Hamid I. Mourad ◽  
Nizamudeen Cherupurakal ◽  
Farrukh Hafeez ◽  
Imad Barsoum ◽  
Farah A. Genena ◽  
...  
Keyword(s):  
Mechanical Characterization ◽  
Epoxy Composite ◽  
High Strength ◽  
Epoxy Composites ◽  
Scanning Calorimetry ◽  
Curing Conditions ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Good Agreement

Herein, we report the fabrication and characterization of high-strength Kevlar epoxy composite sheets for structural application. This process includes optimization of the curing conditions of composite preparation, such as curing time and temperature, and the incorporation of nanofillers, such as aluminum oxide (Al2O3), silicon carbide (SiC), and multi-walled carbon nanotubes (MWCNT) in different weight percentages. Differential scanning calorimetry (DSC) was utilized to investigate the thermal stability and curing behavior of the epoxy, finding that a minimum of 5 min is required for complete curing under an optimized temperature of 170 °C. Moreover, mechanical characterization, including flexural and drop-weight tests, were performed and found to be in good agreement with the DSC results. Our results show that nanofiller incorporation improves the mechanical properties of Kevlar epoxy composites. Among the tested samples, 0.5% MWCNT incorporation obtained the highest mechanical strength.

Effect of Aspect Ratio of MWNTs on the Nano-Mechanical Properties of Epoxy Composites Prepared by Electron Beam Irradiation

2012 ◽  
Vol 486 ◽  
pp. 51-54
Author(s):  
Yan Yan Lu ◽  
Hua Li ◽  
He Zhou Liu
Keyword(s):  
Electron Beam ◽  
Aspect Ratio ◽  
Electron Beam Irradiation ◽  
Epoxy Composite ◽  
Epoxy Composites ◽  
Curing Process ◽  
Beam Irradiation ◽  
Nanomechanical Properties ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

In this article, multi-walled carbon nanotubes (MWNTs) of different aspect ratio were used to reinforce epoxy composite. The MWNTs/epoxy composites were prepared by electron beam (EB) curing process. The effect of aspect ratio on the nanomechanical properties MWNTs/epoxy nanocomposites was studied. The results showed that epoxy composites added with 0.25 wt% short MWNTs showed higher nanohardness than pure epoxy and the composite incorporation with the same amount of long MWNTs, within the indentation depth between 1500 and 2000 nm.

Preparation and Characterization of Aluminium Nanocomposites Based on MWCNT

2014 ◽  
Vol 550 ◽  
pp. 30-38
Author(s):  
S. Sivananthan ◽  
S. Gnanasekaran ◽  
Jerold Samuel C. Samson
Keyword(s):  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Metal Matrix ◽  
High Strength ◽  
Light Weight ◽  
Matrix Composites ◽  
Wide Range ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

Metal Matrix Composites (MMC) has wide range of engineering applications such as high strength, temperature, stiffness, yield strength and modulus of rigidity. Among the metals, aluminium is widely used due to its light weight. However, the electrical conductivity of aluminium is low when compared with copper. This paper deals with the development of aluminium nanocomposites based on Multi Walled Carbon Nanotubes (MWCNT) in order to enhance the electrical resistivity of aluminium. Morphology and electrical properties of the nanocomposites has been analyzed and compared with aluminium.

scholarly journals Statistical Analysis of Polymer Nanocomposites for Mechanical Properties

Molecules ◽  
2021 ◽  
Vol 26 (14) ◽  
pp. 4135
Author(s):  
Shankar A. Hallad ◽  
N. R. Banapurmath ◽  
T. M. Yunus Khan ◽  
M. A. Umarfarooq ◽  
Manzoore Elahi M. Soudagar ◽  
...  
Keyword(s):  
Epoxy Resin ◽  
Polymer Nanocomposites ◽  
Epoxy Resins ◽  
Chemical Resistance ◽  
Mechanical Characterization ◽  
Morphological Studies ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes ◽  
Good Heat

Epoxy resins, due to their high stiffness, ease of processing, good heat, and chemical resistance obtained from cross-linked structures, have found applications in electronics, adhesives coatings, industrial tooling, and aeronautic and automotive industries. These resins are inherently brittle, which has limited their further application. The emphasis of this study is to improve the properties of the epoxy resin with a low-concentration (up to 0.4% by weight) addition of Multi-Walled Carbon Nanotubes (MWCNTs). Mechanical characterization of the modified composites was conducted to study the effect of MWCNTs infusion in the epoxy resin. Nanocomposites samples showed significantly higher tensile strength and fracture toughness compared to pure epoxy samples. The morphological studies of the modified composites were studied using Scanning Electron Microscopy (SEM).

scholarly journals Visco-Hyperelastic Characterization of the Equine Immature Zona Pellucida

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1223
Author(s):  
Elisa Ficarella ◽  
Mohammad Minooei ◽  
Lorenzo Santoro ◽  
Elisabetta Toma ◽  
Bartolomeo Trentadue ◽  
...  
Keyword(s):  
Zona Pellucida ◽  
Soft Matter ◽  
Mechanical Response ◽  
Mechanical Characterization ◽  
Nonlinear Material ◽  
Prony Series ◽  
Critical Comparison ◽  
Highly Nonlinear ◽  
Good Agreement

This article presents a very detailed study on the mechanical characterization of a highly nonlinear material, the immature equine zona pellucida (ZP) membrane. The ZP is modeled as a visco-hyperelastic soft matter. The Arruda–Boyce constitutive equation and the two-term Prony series are identified as the most suitable models for describing the hyperelastic and viscous components, respectively, of the ZP’s mechanical response. Material properties are identified via inverse analysis based on nonlinear optimization which fits nanoindentation curves recorded at different rates. The suitability of the proposed approach is fully demonstrated by the very good agreement between AFM data and numerically reconstructed force–indentation curves. A critical comparison of mechanical behavior of two immature ZP membranes (i.e., equine and porcine ZPs) is also carried out considering the information on the structure of these materials available from electron microscopy investigations documented in the literature.

Cure and Dynamic-Mechanical Behaviors of Vinyl Ester Resinfilled with Multi-Walled Carbon Nanotubes

2010 ◽  
Vol 150-151 ◽  
pp. 1413-1416 ◽  
Author(s):  
Hong Yan Chen ◽  
Zhen Xing Kong ◽  
Ji Hui Wang
Keyword(s):  
Carbon Nanotubes ◽  
Vinyl Ester ◽  
Mechanical Response ◽  
Cure Kinetics ◽  
Crosslinking Density ◽  
Vinyl Ester Resin ◽  
Scanning Calorimetry ◽  
Dynamic Mechanical ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

The cure kinetics of Derakane 411-350, a kind of vinyl ester resin, and its suspensions containing multi-walled carbon nanotubes( MWCNTs) were investigated via non-isothermal dynamic scanning calorimetry (DSC) measurements. The results showed that incorporation of MWCNTs into vinyl ester resin excessively reduces polymerization degree and crosslinking density of vinyl ester resin. For suppressing the negative effect caused by nanotubes, the higher temperature initiator combined with the initiator MEKP was used. Dynamic-mechanical Behavior testing was then carried out on the cured sample in order to relate the curing behavior of MWCNTs modified resin suspensions to mechanical response of their resulting nanocomposites. It was revealed that nanocomposites containing MWCNTs possessed larger storage modulus values as well as higher glass transition temperatures (Tg) as compared to those without MWCNTs after using mixed intiators system to improve the degree of cure.

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