Effects of silane-modified carbon nanotubes on flexural and fracture behaviors of carbon nanotube-modified epoxy/basalt composites

2012 ◽  
Vol 43 (5) ◽  
pp. 2298-2302 ◽  
Author(s):  
M.T. Kim ◽  
K.Y. Rhee ◽  
S.J. Park ◽  
D. Hui
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Fracture Behaviors ◽  
Modified Carbon Nanotubes ◽  
Modified Epoxy

scholarly journals Effect of structure regulation of hyper-branched polyester modified carbon nanotubes on toughening performance of epoxy/carbon nanotube nanocomposites

RSC Advances ◽  
2019 ◽  
Vol 9 (23) ◽  
pp. 12864-12876 ◽  
Author(s):  
Lu Li ◽  
Xia Liao ◽  
Xingyue Sheng ◽  
Zengheng Hao ◽  
Leilei He ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Epoxy Resin ◽  
Hyperbranched Polyesters ◽  
Structure Regulation ◽  
Modified Carbon Nanotubes ◽  
Effect Of Structure ◽  
Properties Of Composites

Carboxylic carbon nanotubes were modified by a series of hyperbranched polyesters (HBP), and epoxy resin/carbon nanotubes composites were prepared. The effect of structure regulation of HBP on toughening properties of composites was discussed.

Effect of carbon nanotube modification on poly (butylene terephthalate)-based composites

2016 ◽  
Vol 70 (6) ◽  
Author(s):  
Agnieszka Piegat ◽  
Anna Jędrzejewska ◽  
Robert Peƚech ◽  
Iwona Peƚech
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Lower Amount ◽  
Butylene Terephthalate ◽  
The Matrix ◽  
Multi Walled Carbon Nanotubes ◽  
Modified Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractThe influence of the chemical modification of carbon nanotubes on the mechanical, thermal and electrical properties of poly(butylene terephthalate)-based composites was investigated. Polymer composites based on poly(butylene terephthalate) were obtained via in situ polymerisation or extrusion. Commercially available multi-walled carbon nanotubes (Nanocyl NC7000) at different loadings (mass %: 0.05, 0.25, 1, 2) were used as fillers. The functionalisation process took place under a chlorine atmosphere followed by a reaction with sodium hydroxide. The effect of carbon nanotube modification was analysed according to the changes in the polymer thermal and mechanical properties. An addition of modified carbon nanotubes in the amount of 0.05 mass % improved the mechanical properties of the composites in terms of both Young’s modulus and tensile strength by 5–10 % and 17–30 % compared with composites with unmodified carbon nanotubes and neat poly(butylene terephthalate), respectively. The in situ method of composite preparation was a more effective technique for enhancing the matrix–filler interactions, although a significantly lower amount of fillers were used than in the extrusion method.

Influence of the carbon nanotube surface modification on the microstructure of thermoplastic binders

RSC Advances ◽  
2015 ◽  
Vol 5 (64) ◽  
pp. 51621-51630 ◽  
Author(s):  
S. V. Larin ◽  
A. D. Glova ◽  
E. B. Serebryakov ◽  
V. M. Nazarychev ◽  
J. M. Kenny ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Molecular Dynamics ◽  
Surface Modification ◽  
Carbon Nanotube ◽  
Molecular Dynamics Simulations ◽  
Structural Properties ◽  
Polymer Nanocomposites ◽  
Dynamics Simulations ◽  
Surface Modified ◽  
Modified Carbon Nanotubes

The structural properties of polymer nanocomposites based on thermoplastic polyimides filled with surface-modified carbon nanotubes (CNT) have been studied by means of fully-atomistic molecular-dynamics simulations.

Structure and Characteristics of Carbon Nanotube Reinforced SiC Composite

2017 ◽  
Vol 726 ◽  
pp. 127-131 ◽  
Author(s):  
Qiang Li ◽  
You Jun Zheng ◽  
Jin Feng Xia ◽  
Dan Yu Jiang
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Multiwall Carbon Nanotubes ◽  
Micro Structure ◽  
Reinforced Composite ◽  
Sic Composites ◽  
Modified Carbon Nanotubes ◽  
The Relationship ◽  
Multiwall Carbon

Carbon nanotube plays an important role in various applications due to its extreme optic, electronic and mechanical properties. In the present work, attempts have made to investigate the effects of incorporation of multiwall carbon nanotubes (MWNTs) on microstructure and mechanical properties of SiC composites. Firstly, carbon nanotubes were modified by chemical method in order to add carboxyl group on their surface. Then modified carbon nanotubes were located on the surface on SiC particles by silicon coupling agent. A designed carbon nanotube reinforced composite was obtained after pressureless sintering. SEM was employed to investigate the micro-structure of as-prepared SiC material. Its properties of, such as density, hardness, strength, etc. were determined in detail. The relationship between the micro-structure and properties of carbon nanotube reinforced SiC composite were discussed.

Mechanical, electrical, and melt flow properties of polyurethane elastomer/surface-modified carbon nanotube composites

2016 ◽  
Vol 51 (14) ◽  
pp. 1987-1996 ◽  
Author(s):  
Umit Tayfun ◽  
Yasin Kanbur ◽  
Ufuk Abacı ◽  
Hasan Yüksel Güney ◽  
Erdal Bayramlı
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Melt Flow Index ◽  
Flow Index ◽  
Polyurethane Elastomer ◽  
Index Test ◽  
Melt Flow ◽  
Interfacial Interactions ◽  
Surface Modified ◽  
Modified Carbon Nanotubes

Carbon nanotube-reinforced polyurethane elastomer composites were prepared by melt-mixing. Nitric acid oxidation and silanization were applied to carbon nanotube surfaces to achieve better interfacial interactions with polyurethane elastomer. Tensile and hardness tests, differential scanning calorimetry, melt flow index test, dielectric measurements, and morphological studies of composites were reported. The best results were obtained for surface-modified carbon nanotubes containing composites with lower loading levels. Addition of carbon nanotubes leads to almost two-fold increase in strain and modulus compared to pristine polyurethane elastomer. Tensile strength of composites was also improved by inclusion of carbon nanotubes. However, strength values drop down with increasing carbon nanotube content. Shore hardness increased with the inclusion of modified carbon nanotube to polyurethane elastomer while pristine carbon nanotube caused remarkable decrease in hardness of polyurethane elastomer. Relatively higher melting points and slightly lower glass transition temperatures were observed for carbon nanotube-loaded composites compared to polyurethane elastomer because of plasticizing effect of carbon nanotube. Incorparation of carbon nanotube to polyurethane elastomer matrix caused reduction in melt flow index values due to formation of agglomarates, and n the contrary, surface modifications of carbon nanotube exhibited increase in melt flow index thanks to enhanced interfacial interactions between carbon nanotube and polyurethane elastomer. Significant increase in dielectric constant of composites was observed. Better dispersion of surface modified carbon nanotubes into polyurethane elastomer was also concluded from SEM micrographs of composites.

Electrochemical Combustion of Phenol at the Carbon Nanotube Electrode

2005 ◽  
Vol 23 ◽  
pp. 289-292 ◽  
Author(s):  
C.G. Hu ◽  
W.L. Wang ◽  
Bo Feng
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Nitric Acid ◽  
Phosphate Buffer ◽  
Aqueous Media ◽  
Phosphate Buffer Solution ◽  
Buffer Solution ◽  
Long Time ◽  
Modified Carbon Nanotubes ◽  
Electrochemical Combustion

The carboxyl modified carbon nanotubes were obtained by treating them in the concentrated nitric acid with a little surfactant. The complete electrochemical combustion of phenol has been found under 5 M at the carboxyl modified carbon nanotube electrode in phosphate buffer solution. The reaction was discussed in details. Due to the porous tubule of the structure of the carbon nanotube and large quantity of hydroxyl exists in the carboxyl modified carbon nanotube electrode, which were necessary for the continually electrochemical combustion of phenol. Long time potentiostatic oxidation showed that the phenol could be eliminated from the aqueous media without any foul at the carbon nanotube electrode.

Fabrication of Carbon Nanotube Triode Using Helicon Plasma Cvd with Electroplated Nico Catalyst

2003 ◽  
Vol 772 ◽  
Author(s):  
Masakazu Muroyama ◽  
Kazuto Kimura ◽  
Takao Yagi ◽  
Ichiro Saito
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Metal Catalyst ◽  
Ni Catalyst ◽  
Plasma Cvd ◽  
Helicon Plasma ◽  
Plasma Enhanced Cvd ◽  
Turn On ◽  
Aligned Carbon Nanotubes ◽  
Vertically Aligned

AbstractA carbon nanotube triode using Helicon Plasma-enhanced CVD with electroplated NiCo catalyst has been successfully fabricated. Isolated NiCo based metal catalyst was deposited at the bottom of the cathode wells by electroplating methods to control the density of carbon nanotubes and also reduce the activation energy of its growth. Helicon Plasma-enhanced CVD (HPECVD) has been used to deposit nanotubes at 400°C. Vertically aligned carbon nanotubes were then grown selectively on the electroplated Ni catalyst. Field emission measurements were performed with a triode structure. At a cathode to anode gap of 1.1mm, the turn on voltage for the gate was 170V.

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