Enhanced thermal conductive property of epoxy composites by low mass fraction of organic–inorganic multilayer covalently grafted carbon nanotubes

2016 ◽  
Vol 125 ◽  
pp. 90-99 ◽  
Author(s):  
Wenqi Yu ◽  
Jifang Fu ◽  
Liya Chen ◽  
Peisong Zong ◽  
Jintao Yin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Mass Fraction ◽  
Epoxy Composites ◽  
Low Mass ◽  
Conductive Property

Enhanced thermal conductive property of polyamide composites by low mass fraction of covalently grafted graphene nanoribbons

2015 ◽  
Vol 3 (42) ◽  
pp. 10990-10997 ◽  
Author(s):  
Peng Ding ◽  
Nan Zhuang ◽  
Xieliang Cui ◽  
Liyi Shi ◽  
Na Song ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Polymer Matrix ◽  
Mass Fraction ◽  
Graphene Nanoribbons ◽  
Low Mass ◽  
Thermal Contacts ◽  
Conductive Property

Covalently grafted graphene nanoribbons allows for reducing the number of thermal contacts between GNR layers and leading to the more efficient thermal paths in polymer matrix. The result is a 165% enhancement of the thermal conductivity of polyamide composites at a 0.5 wt% of GNR.

scholarly journals Comparison between multi-walled carbon nanotubes and titanium dioxide nanoparticles as additives on performance of turbine meter oil nano lubricant

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hadi Pourpasha ◽  
Saeed Zeinali Heris ◽  
Yaghob Mohammadfam
Keyword(s):  
Carbon Nanotubes ◽  
Titanium Dioxide ◽  
Friction Coefficient ◽  
Pressure Drop ◽  
Mass Fraction ◽  
Viscosity Index ◽  
Wear Depth ◽  
Nano Lubricant ◽  
Multi Walled Carbon Nanotubes ◽  
Walled Carbon Nanotubes

AbstractThis research aims of compare the impact of the mass fraction of multi-walled carbon nanotubes (MWCNTs) and titanium dioxide (TiO2) nano additive on the tribological and thermophysical attributes of turbine meter oil. These attributes include the average friction coefficient, pressure drop, wear, flash point, pour point, relative viscosity, kinematics viscosity, and viscosity index. The pressure drops and the average friction coefficient inside the copper tube were simulated and compared with experimental results. In this study, for the synthesis of nano lubricants from turbine meter oil as a pure fluid and from MWCNTs and TiO2 as nano additives in the mass fraction of 0.05, 0.1, 0.2, 0.3, and 0.4 wt.% and from oleic acid and Triton x100 as surfactants were utilized. The results illustrated that the wear depth of copper pins in the presence of nano lubricant with 0.4 wt.% of MWCNTs and 0.1 wt.% TiO2 was improved by 88.26% and 71.43%, respectively. Increasing 0.3 wt.% of TiO2 and MWCNTs into the oil caused to improvement in viscosity index. The simulation data and experimental data for the pressure drop were closer together and indicated a minor error that the maximum error is less than 10%.

Complex permittivity of epoxy composites with carbon nanotubes and TiO2 in microwave range

2021 ◽  
Vol 717 (1) ◽  
pp. 121-127
Author(s):  
O. V. Lozitsky ◽  
L. L. Vovchenko ◽  
L. Y. Matzui ◽  
V. V. Zagorodnii ◽  
V. V. Oliynyk ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Complex Permittivity ◽  
Epoxy Composites ◽  
Microwave Range

Roll-to-roll printed carbon nanotubes on textile substrates as a heating layer in fiber-reinforced epoxy composites

2017 ◽  
Vol 135 (10) ◽  
pp. 45950 ◽  
Author(s):  
Thomas Fischer ◽  
Julia Rühling ◽  
Nora Wetzold ◽  
Tino Zillger ◽  
Thomas Weissbach ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Epoxy Composites ◽  
Fiber Reinforced ◽  
Roll To Roll

scholarly journals Cosmological simulations of low-mass galaxies: some potential issues

2010 ◽  
Vol 6 (S270) ◽  
pp. 503-506
Author(s):  
Pedro Colín ◽  
Vladimir Avila-Reese ◽  
Octavio Valenzuela
Keyword(s):  
Star Formation ◽  
Adaptive Mesh Refinement ◽  
Mass Fraction ◽  
Star Formation Rate ◽  
Formation Rate ◽  
Mesh Refinement ◽  
Adaptive Mesh ◽  
Stellar Mass ◽  
The Galaxy ◽  
Low Mass

AbstractCosmological Adaptive Mesh Refinement simulations are used to study the specific star formation rate (sSFR=SSF/Ms) history and the stellar mass fraction, fs=Ms/MT, of small galaxies, total masses MT between few × 1010 M⊙ to few ×1011 M⊙. Our results are compared with recent observational inferences that show the so-called “downsizing in sSFR” phenomenon: the less massive the galaxy, the higher on average is its sSFR, a trend seen at least since z ~ 1. The simulations are not able to reproduce this phenomenon, in particular the high inferred values of sSFR, as well as the low values of fs constrained from observations. The effects of resolution and sub-grid physics on the SFR and fs of galaxies are discussed.

Effect of the addition of aliphatic diamine-functionalized carbon nanotubes on the interfacial adhesion of glass fiber/epoxy composites

2021 ◽  
pp. 004051752110519
Author(s):  
Yecheng Fan ◽  
Shen Ziyue ◽  
Shaohua Zeng ◽  
Pengpeng Chen ◽  
Ying Xu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Glass Fiber ◽  
Interfacial Adhesion ◽  
Control Sample ◽  
Epoxy Composites ◽  
Aliphatic Diamine ◽  
Uniform Dispersion ◽  
Fiber Matrix ◽  
Interlaminar Shear ◽  
Chain Lengths

To improve the interfacial adhesion of glass fiber (GF)/epoxy composites, the GF surface was treated by dispersing aliphatic diamine-functionalized multi-walled carbon nanotubes (MWCNTs). Carboxyl MWCNTs were first modified by aliphatic diamine with different alkyl chain lengths and then deposited on the surface of GF. The effect of aliphatic diamine chain lengths on the MWCNTs’ dispersion and interfacial properties of resultant composites was investigated in detail. The results showed that uniform dispersion of MWCNTs and strong fiber/matrix interfacial adhesion could be achieved, based on the grafting of 1,8-octanediamine onto MWCNTs. Compared with the control sample, the interlaminar shear, flexural, and tensile strengths of the treated composites increased by 41%, 29%, and 30%, respectively; the interlaminar fracture toughness and storage modulus in the glass region were significantly enhanced; and the glass transition temperature increased by more than 8°C. This work demonstrates that the carbon nanotubes functionalized by appropriate chain lengths of amine modifier can improve the fiber/matrix interfacial interactions and thus enhance the strength, toughness, and stiffness of fiber-reinforced composites.

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