scholarly journals Preparation of poly(ionic liquid)/multi-walled carbon nanotube fillers using divinylbenzene as a linker to enhance the impact resistance of polyurethane elastomers

RSC Advances ◽  
2022 ◽  
Vol 12 (3) ◽  
pp. 1777-1787
Author(s):  
Zehui Xiang ◽  
Fan Hu ◽  
Xueyan Wu ◽  
Fugang Qi ◽  
Biao Zhang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Carbon Nanotube ◽  
High Speed ◽  
Impact Resistance ◽  
Polyurethane Elastomers ◽  
High Speed Impact ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Composite ◽  
Poly Ionic Liquid ◽  
The Impact

Schematic diagram of multi-walled carbon nanotube composite ionic liquid synergistically enhancing the high-speed impact resistance of polyurethane elastomer.

High and Low Speed Impact Characteristics of Nanocomposites

2015 ◽  
Vol 1105 ◽  
pp. 62-66 ◽  
Author(s):  
Saud Aldajah ◽  
Yousef Haik ◽  
Kamal Moustafa ◽  
Ammar Alomari
Keyword(s):  
High Speed ◽  
Impact Resistance ◽  
Absorption Capacity ◽  
Impact Testing ◽  
Energy Absorption Capacity ◽  
Low Speed ◽  
High Speed Impact ◽  
Bulletproof Vest ◽  
Impact Characteristics ◽  
The Impact

Nanocomposites attracted the attention of scientists due to their superior mechanical, thermal, chemical and electrical properties. This research studied the impact of adding carbon nanotubes (CNTs) to the woven Kevlar laminated composites on the high and low speed impact characteristics. Different percentages of CNTs were added to the woven Kevlar-Vinylester composite materials. An in-house developed drop weight testing apparatus was utilized for the low speed impact testing. Two different concentrations of the CNTs were added to a 15-layer woven Kevlar laminates, 0.32 wt% and 0.8 wt%. The results showed that: The 0.32 wt % CNT sample enhanced the interlaminar strength of the composite without enhancing the energy absorption capacity whereas, the 0.8 wt % CNT sample did not improve the impact resistance of the Kevlar composite.For the high speed impact tests, a bulletproof vest was prepared using woven Kevlar, resin, and CNTs at 1.5 w% percentage. The ballistic shooting was carried out by a professional shooter using a 30 caliber and 9 mm bullets for the tests. The CNT bulletproof sample bounced back the 30 caliber copper alloy bullet with no penetration.

High-speed impact and mechanical strength of ZrO2/polycarbonate nanocomposite

2016 ◽  
Vol 26 (7) ◽  
pp. 989-1002 ◽  
Author(s):  
Yasser Rostamiyan ◽  
Amir Ferasat
Keyword(s):  
Mechanical Strength ◽  
High Speed ◽  
Impact Resistance ◽  
High Velocity Impact ◽  
Neat Polymer ◽  
Buckling Strength ◽  
High Speed Impact ◽  
Transmission Electron ◽  
Izod Impact ◽  
The Impact

This study empirically investigates the mechanical strength and high-speed impact resistance of polycarbonate matrix reinforced with different amounts of nano-ZrO2. In order to enhance the mechanical strength of polycarbonate, especially the impact resistance, the nanoparticles were added to polycarbonate matrix as filler with the ratios of 1, 2, 3 and 5% of the composite’s total weight. Transmission electron microscope was utilized for the observation of microscopic structure of the composites, and it revealed an exceptional homogeneous mixture of ZrO2 particles in the polycarbonate matrix. From the results of the tests, it was figured out that adding 1–3 wt% of nano-ZrO2 into polycarbonate remarkably increased the impact resistance of the composite. The results also showed that adding 1 and 2 wt% of nano-ZrO2 to polycarbonate had the most desirable effects on the enhancement of tensile, bending and buckling strength; however, the composites with 3 wt% of nano-ZrO2 had the greatest Izod impact and high-velocity impact resistance. Finally for the impact tests, it was revealed that adding large amounts of nano-ZrO2 (more than 3 wt%) would decrease the mechanical strength of ZrO2/polycarbonate nanocomposite specimens; thus, the fracture occurred, while less energy was absorbed compared with the neat polymer.

The electrolyte switchable solubility of multi-walled carbon nanotube/ionic liquid (MWCNT/IL) hybrids

2006 ◽  
pp. 2356 ◽  
Author(s):  
Bo Yu ◽  
Feng Zhou ◽  
Gang Liu ◽  
Yongmin Liang ◽  
Wilhelm T. S. Huck ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Carbon Nanotube ◽  
Multi Walled Carbon Nanotube

Experimental Calibration of ISV Damage Model Constants for Pure Copper for High-Speed Impact Simulation

2016 ◽  
Author(s):  
Yangqing Dou ◽  
Yucheng Liu ◽  
Wilburn Whittington ◽  
Jonathan Miller
Keyword(s):  
High Speed ◽  
Impact Analysis ◽  
Split Hopkinson Pressure Bar ◽  
Internal State ◽  
Pure Copper ◽  
Damage Model ◽  
Hopkinson Pressure Bar ◽  
Experimental Calibration ◽  
High Speed Impact ◽  
The Impact

Coefficients and constants of a microstructure-based internal state variable (ISV) plasticity damage model for pure copper have been calibrated and used for damage modeling and simulation. Experimental stress-strain curves obtained from Cu samples at different strain rate and temperature levels provide a benchmark for the calibration work. Instron quasi-static tester and split-Hopkinson pressure bar are used to obtain low-to-high strain rates. Calibration process and techniques are described in this paper. The calibrated material model is used for high-speed impact analysis to predict the impact properties of Cu. In the numerical impact scenario, a 100 mm by 100 mm Cu plate with a thickness of 10 mm will be penetrated by a 50 mm-long Ni rod with a diameter of 10mm. The thickness of 10 mm was selected for the Cu plate so that the Ni-Cu penetration through the thickness can be well observed through the simulations and the effects of the ductility of Cu on its plasticity deformation during the penetration can be displayed. Also, that thickness had been used by some researchers when investigating penetration mechanics of other materials. Therefore the penetration resistance of Cu can be compared to that of other metallic materials based on the simulation results obtained from this study. Through this study, the efficiency of this ISV model in simulating high-speed impact process is verified. Functions and roles of each of material constant in that model are also demonstrated.

Mechanical Properties Of Polyaniline / Multi-walled Carbon Nanotube Composite Films

2003 ◽  
Vol 791 ◽  
Author(s):  
P. C. Ramamurthy ◽  
W. R. Harrell ◽  
R. V. Gregory ◽  
B. Sadanadan ◽  
A. M. Rao
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Composite Films ◽  
Weight Percent ◽  
Organic Electronic Devices ◽  
Multiwalled Carbon ◽  
Multi Walled Carbon Nanotube ◽  
Contact Devices ◽  
Carbon Nanotube Composite

ABSTRACTHigh molecular weight polyaniline / multi-walled carbon nanotube composite films were fabricated using solution processing. Composite films with various weight percentages of multiwalled carbon nanotubes were fabricated. Physical properties of these composites were analyzed by thermogravimetric analysis, tensile testing, and scanning electron microscopy. These results indicate that the addition of multiwalled nanotubes to polyaniline significantly enhances the mechanical properties of the films. In addition, metal–semiconductor (composite) (MS) contact devices were fabricated, and it was observed that the current level in the films increased with increasing multiwalled nanotube content. Furthermore, it was observed that polyaniline containing one weight percent of carbon nanotubes appears to be the most promising composition for applications in organic electronic devices.

High-speed impacts of slender bodies into non-smooth, complex fluids

2018 ◽  
Vol 861 ◽  
Author(s):  
Ishan Sharma
Keyword(s):  
Penetration Depth ◽  
High Speed ◽  
Complex Fluids ◽  
Laboratory Data ◽  
Impact Speed ◽  
High Speed Impact ◽  
Smooth Complex ◽  
Theoretical Predictions ◽  
Slender Bodies ◽  
The Impact

We present a simple hydrodynamical model for the high-speed impact of slender bodies into frictional geomaterials such as soils and clays. We model these materials as non-smooth, complex fluids. Our model predicts the evolution of the impactor’s speed and the final penetration depth given the initial impact speed, and the material and geometric parameters of the impactor and the impacted material. As an application, we investigate the impact of deep-penetrating anchors into seabeds. Our theoretical predictions are found to match field and laboratory data very well.

Na3.12Fe2.44(P2O7)2/multi-walled carbon nanotube composite as a cathode material for sodium-ion batteries

2015 ◽  
Vol 3 (33) ◽  
pp. 17224-17229 ◽  
Author(s):  
Yubin Niu ◽  
Maowen Xu ◽  
Chuanjun Cheng ◽  
ShuJuan Bao ◽  
Junke Hou ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Solid State ◽  
Cathode Material ◽  
Solid State Reaction ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Multi Walled Carbon Nanotube ◽  
Carbon Nanotube Composite

Na3.12Fe2.44(P2O7)2/multi-walled carbon nanotube (MWCNT) composite was fabricated by a solid state reaction and was further used to fabricate a cathode for sodium-ion batteries.

scholarly journals Ionic-liquid-assisted one-pot synthesis of Cu2O nanoparticles/multi-walled carbon nanotube nanocomposite for high-performance asymmetric supercapacitors

RSC Advances ◽  
2018 ◽  
Vol 8 (36) ◽  
pp. 20182-20189 ◽  
Author(s):  
Ying Lu ◽  
Jian-Long Xu ◽  
Shan Ren ◽  
Ya-Nan Zhong ◽  
Xu Gao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Carbon Nanotube ◽  
High Performance ◽  
Room Temperature ◽  
Synergistic Effects ◽  
Asymmetric Supercapacitors ◽  
One Pot ◽  
Multi Walled Carbon Nanotube ◽  
Cu2o Nanoparticles ◽  
Cycling Life

A one-pot room-temperature-ionic-liquid-assisted sputtering approach is designed to synthesize Cu2O/MWCNTs nanocomposite with high capacitance and long cycling life due to synergistic effects of oxygen-deficient Cu2O and conductive MWCNTs.

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