Modifying mechanical properties of carbon textiles reinforced epoxy composite using multi-wall carbon nanotubes (MWCNT)

2017 ◽  
Vol 109 (8) ◽  
pp. 1076-1082 ◽  
Author(s):  
B. Shahriyari ◽  
F. Mousazadegan ◽  
M. Latifi ◽  
H. R. Pakravan
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Epoxy Composite ◽  
Multi Wall Carbon Nanotubes

scholarly journals Time-Stability Dispersion of MWCNTs for the Improvement of Mechanical Properties of Portland Cement Specimens

Materials ◽  
2020 ◽  
Vol 13 (18) ◽  
pp. 4149
Author(s):  
Laura M. Echeverry-Cardona ◽  
Natalia Álzate ◽  
Elisabeth Restrepo-Parra ◽  
Rogelio Ospina ◽  
Jorge H. Quintero-Orozco
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Raman Spectroscopy ◽  
Portland Cement ◽  
Time Stability ◽  
Cement Pastes ◽  
Multi Wall Carbon Nanotubes ◽  
Vis Spectroscopy ◽  
The Stability ◽  
Over Time

This study shows the energy optimization and stabilization in the time of solutions composed of H2O + TX-100 + Multi-Wall Carbon Nanotubes (MWCNTs), used to improve the mechanical properties of Portland cement pastes. For developing this research, sonication energies at 90, 190, 290, 340, 390, 440, 490 and 590 J/g are applied to a colloidal substance (MWCNTs/TX-100 + H2O) with a molarity of 10 mM. Raman spectroscopy analyses showed that, for energies greater than 440 J/g, there are ruptures and fragmentation of the MWCNTs; meanwhile at energies below 390 J/g, better dispersions are obtained. The stability of the dispersion over time was evaluated over 13 weeks using UV-vis spectroscopy and Zeta Potential. With the most relevant data collected, sonication energies of 190, 390 and 490 J/g, at 10 mM were selected at the first and the fourth week of storage to obtain Portland cement specimens. Finally, we found an improvement of the mechanical properties of the samples built with Portland cement and solutions stored for one and four weeks; it can be concluded that the MWCNTs improved the hydration period.

Multifunctional Elastomer Nanocomposites based on EPDM and Carbon Nanotubes

2008 ◽  
Vol 1143 ◽  
Author(s):  
Paola Ciselli ◽  
Lan Lu ◽  
James JC Busfield ◽  
Ton Peijs
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Linear Relation ◽  
Pressure Sensors ◽  
Ethylene Propylene Diene Monomer ◽  
Electrical Behavior ◽  
Ethylene Propylene ◽  
Multi Wall Carbon Nanotubes ◽  
Sensor Applications ◽  
Elastomeric Composites

ABSTRACTElastomeric composites based on Ethylene-Propylene-Diene-Monomer (EPDM) filled with multi-wall carbon nanotubes (MWNTs) have been prepared, showing improved mechanical properties as compared to the pure EPDM matrix. The results have been discussed using the Guth model. The main focus of the study was on the electrical behavior of the nanocomposites, in view of possible sensor applications. A linear relation has been found between conductivity and deformations up to 10% strain, which means that such materials could be used for applications such as strain or pressure sensors. Cyclic experiments were conducted to establish whether the linear relation was reversible, which is an important requirement for sensor materials.

Role of Multiwalled Carbon Nanotube on Mechanical Reinforcement of High-Density Polyethylene

2013 ◽  
Vol 652-654 ◽  
pp. 15-24 ◽  
Author(s):  
Xia Ran Miao ◽  
Yuan Jiang Qi ◽  
Xiao Yun Li ◽  
Yu Zhu Wang ◽  
Xiao Long Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
High Density Polyethylene ◽  
High Density ◽  
Scanning Calorimetry ◽  
Melt Mixing ◽  
Multiwalled Carbon ◽  
Mechanical Reinforcement ◽  
Multi Wall Carbon Nanotubes ◽  
X Ray Scattering

The high density polyethylene (HDPE) nanocomposites were prepared by melt mixing HDPE with multi-wall carbon nanotubes (MWCNTs). In this work, the morphological, nucleation, crystallization and mechanical properties of the HDPE nanocomposites were studied by scanning electron microscopy, different scanning calorimetry, small-angle X-ray scattering and tensile testing. It was found that the tensile strength and Young’s modulus is increased by 42.4% and 116.5% at 3.wt% MWCNT loading compared to the pure HDPE. According to SEM results combined with SAXS, well-defined nanohybird shish-kebab (NHSK) entities exist in the composites, and in the shish-kebab structures fibrillous carbon nanotubes (MWCNTs) act as shish while HDPE lamellae act as kebab. The crystallization behavior, probed by DSC, suggests that MWCNTs have strong nucleation ability and shear stress plays an important role in polymer crystallization process. The mechanical properties demonstrated that the formation of the Shish-kebab structures improved the interfacial adhesion and brought obvious mechanical enhancement for the HDPE/MWCNTs nanocomposites.

Enhanced electrical conductivity and piezoresistive sensing in multi-wall carbon nanotubes/polydimethylsiloxane nanocomposites via the construction of a self-segregated structure

Nanoscale ◽  
2017 ◽  
Vol 9 (31) ◽  
pp. 11017-11026 ◽  
Author(s):  
Ming Wang ◽  
Kai Zhang ◽  
Xin-Xin Dai ◽  
Yin Li ◽  
Jiang Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Electrical Conductivity ◽  
Percolation Threshold ◽  
Multi Wall Carbon Nanotubes ◽  
Segregated Structure

Self-segregated PDMS/MWCNT nanocomposites exhibit high piezoresistive sensitivity, low percolation threshold and an enhanced mechanical properties.

Improved dispersion of multi-wall carbon nanotubes in poly(butylene terephthalate) using benzimidazolium surfactants

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Martino Colonna ◽  
Corrado Berti ◽  
Enrico Binassi ◽  
Maurizio Fiorini ◽  
Francesco Acquasanta ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Thermal Stability ◽  
In Situ Polymerization ◽  
Nucleation Process ◽  
Imidazolium Salt ◽  
Butylene Terephthalate ◽  
Multi Wall Carbon Nanotubes ◽  
Benzimidazolium Salt

AbstractMulti-wall carbon nanotubes/poly(butylene terephthalate) nanocomposites have been prepared by in-situ polymerization. Benzimidazolium tetrafluoroborate salts improve the dispersion of carbon nanotubes in the polymer matrix due to the formation of “π-cation” interactions of the imidazolium salt with the surface of the carbon nanotubes. An improved dispersion of the nanotubes in butanediol was also observed using the benzimidazolium salt. The presence of the compatibilization agent gives rise to improved thermo-mechanical properties and electrical conductivity for the nanocomposite. The presence of the nanotubes also consistently increases the thermal stability and enhances the nucleation process on PBT crystallization.

Effect of Multi-Wall Carbon Nanotubes on the Properties of Natural Rubber Nanocomposites

2013 ◽  
Vol 832 ◽  
pp. 338-343 ◽  
Author(s):  
Azira Abd. Aziz ◽  
A.I.H. Habibah Dayang ◽  
Abu Bakar Suriani ◽  
Mohamad Rusop Mahmood
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Natural Rubber ◽  
Mechanical Test ◽  
Chemical Properties ◽  
Tensile Modulus ◽  
Physical And Mechanical Properties ◽  
Volume Resistivity ◽  
Multi Wall Carbon Nanotubes ◽  
Initial Modulus

Multi-walled carbon nanotubes (MWNTs) were used to prepare epoxidised natural rubber (ENR) nanocomposites. Our attempt to achieve nanostructures in MWNTs/ENR nanocomposites were formed by incorporating carbon nanotubes in a polymeric solution. Using this technique, nanotubes can be dispersed homogeneously in the ENR matrix with an attempt to increase the mechanical properties of these nanocomposites. The properties of the nanocomposites such as volume resistivity, tensile strength and tensile modulus were studied. Mechanical test results show an increase in the initial modulus for up to 14 times in relation to pure ENR. In addition to mechanical testing, the dispersion state of the MWNTs into ENR was studied by field emission electron microscopy (FESEM) and atomic force microscope (AFM) in order to understand the morphology of the resulting system. According to the present study, application of the physical and mechanical properties of carbon nanotubes to ENR can result in rubber products which have improved mechanical, physical and chemical properties.

High Molecular Weight Polyethylene Nanospheres: Synthesis, Physical and Mechanical Properties—Second Harmonic Generation

2008 ◽  
Vol 8 (6) ◽  
pp. 2979-2982
Author(s):  
C. J. Hsu ◽  
L. W. Chang ◽  
S. Y. Miao ◽  
J. T. Lue
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Molecular Weight ◽  
Harmonic Generation ◽  
Signal Intensity ◽  
Second Harmonic ◽  
Physical And Mechanical Properties ◽  
Graphene Sheets ◽  
Multi Wall Carbon Nanotubes ◽  
Anharmonic Oscillation

The weak second harmonic light generating from carbon nanotubes are detected. The signal intensity closely related to the density of π-bonds attributed to the defects in the rolled graphene sheets, which is stimulated to have anharmonic oscillation as strongly affected by the environment. The intensities of SHG are diminished in order of well-aligned multi-wall carbon nanotubes (MWCNTs), randomly-aligned MWCNTs, and then to single-wall CNTs.

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