Comparative study on thermal and electrical transport properties of hexagonal boron nitride and reduced graphene oxide/epoxy nanocomposite by transient plane source techniques and impedance spectroscopy

2021 ◽  
Author(s):  
Akash M. Chandran ◽  
S. Varun ◽  
Prasanna Kumar S. Mural
Keyword(s):  
Graphene Oxide ◽  
Impedance Spectroscopy ◽  
Boron Nitride ◽  
Electrical Transport ◽  
Hexagonal Boron Nitride ◽  
Plane Source ◽  
Electrical Transport Properties ◽  
Epoxy Nanocomposite ◽  
Transient Plane Source ◽  
Reduced Graphene

scholarly journals Boron nitride nanoplatelets as two-dimensional thermal fillers in epoxy composites: new scenarios at very low filler loadings

2020 ◽  
Vol 40 (10) ◽  
pp. 859-867
Author(s):  
Yao Shi ◽  
Genlian Lin ◽  
Xi-Fei Ma ◽  
Xiao Huang ◽  
Jing Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Boron Nitride ◽  
Filler Content ◽  
Hexagonal Boron Nitride ◽  
Filler Loading ◽  
Epoxy Composites ◽  
General Phenomenon ◽  
Sudden Drop ◽  
Reduced Graphene ◽  
Thermal Conducting

AbstractHexagonal boron nitride (h-BN) nanoplatelets (0.6 μm in diameter and 100 nm in thickness) are introduced into epoxy resin to improve the polymer’s thermal conducting ability. As expected, the thermal conductivities (TCs) of the composites, especially the in-plane TCs, are significantly increased. The in-plane TC of the epoxy composites can reach 1.67 W/mK at only 0.53 wt% loading, indicating h-BN nanopletelets are very effective thermal fillers. However, after carefully studied the correlation of the TC improvement and filler content, a sudden drop of the TC around 0.53 wt% filler loading is observed. Such an unexpected decrease in TC has never been reported and is also found to be consistent with the Tg changes versus filler content. Similar trend is also observed in other 2-D nanofillers, such as graphene oxide, reduced graphene oxide, which may indicate it is a general phenomenon for 2-D nanofillers. SEM results suggest that such sudden drop in TC might be coming from the enrichment of these 2-D nanofillers in localized areas due to their tendency to form more ordered phase above certain concentrations.

scholarly journals Three-Dimensional Heterostructured Reduced Graphene Oxide-Hexagonal Boron Nitride-Stacking Material for Silicone Thermal Grease with Enhanced Thermally Conductive Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 938 ◽  
Author(s):  
Weijie Liang ◽  
Xin Ge ◽  
Jianfang Ge ◽  
Tiehu Li ◽  
Tingkai Zhao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Boron Nitride ◽  
Reduced Graphene Oxide ◽  
Hexagonal Boron Nitride ◽  
Three Dimensional ◽  
Thermal Interface Materials ◽  
Reduced Graphene ◽  
Thermally Conductive ◽  
Thermal Grease ◽  
Conductive Properties

The thermally conductive properties of silicone thermal grease enhanced by hexagonal boron nitride (hBN) nanosheets as a filler are relevant to the field of lightweight polymer-based thermal interface materials. However, the enhancements are restricted by the amount of hBN nanosheets added, owing to a dramatic increase in the viscosity of silicone thermal grease. To this end, a rational structural design of the filler is needed to ensure the viable development of the composite material. Using reduced graphene oxide (RGO) as substrate, three-dimensional (3D) heterostructured reduced graphene oxide-hexagonal boron nitride (RGO-hBN)-stacking material was constructed by self-assembly of hBN nanosheets on the surface of RGO with the assistance of binder for silicone thermal grease. Compared with hBN nanosheets, 3D RGO-hBN more effectively improves the thermally conductive properties of silicone thermal grease, which is attributed to the introduction of graphene and its phonon-matching structural characteristics. RGO-hBN/silicone thermal grease with lower viscosity exhibits higher thermal conductivity, lower thermal resistance and better thermal management capability than those of hBN/silicone thermal grease at the same filler content. It is feasible to develop polymer-based thermal interface materials with good thermal transport performance for heat removal of modern electronics utilising graphene-supported hBN as the filler at low loading levels.

scholarly journals Research on tribological properties of oil containing graphene oxide or hexagonal boron nitride

2020 ◽  
Vol 68 (4) ◽  
pp. 29-55
Author(s):  
Patrycja Magdalena Nogas ◽  
Krzysztof Gocman ◽  
Tadeusz Kałdoński
Keyword(s):  
Graphene Oxide ◽  
Boron Nitride ◽  
Reduced Graphene Oxide ◽  
Tribological Properties ◽  
Surface Engineering ◽  
Electronic Materials ◽  
Hexagonal Boron Nitride ◽  
University Of Technology ◽  
Reduced Graphene ◽  
The Military

The aim of this publication is to present the results of studies on the SN-650 oil base with various concentrations of graphene oxide (GO), reduced graphene oxide (rGO) produced by the Institute of Electronic Materials Technology in Warsaw and hexagonal boron nitride (h-BN) produced according to the technology developed at the Military University of Technology. The first part of the publication presents basic information about graphene oxide and the possibilities of its use, in particular in the field of tribology. The second part of the publication presents the results of tests of lubricity properties of the samples with the addition of 0.05%, 0.1%, 0.5%, 1% and 2% of graphene oxide, reduced graphene oxide or hexagonal boron nitride. The measurements were carried out using the UNMT universal nano/microtester tester and the T-02 four-ball device, at the Department of Tribology, Surface Engineering and Logistics of Service Fluids, which is a part of the Institute of Mechanical Vehicles and Transport of the Mechanical Faculty of the Military University of Technology. The obtained results have demonstrated the beneficial effect of introducing additions in the form of graphene oxide or hexagonal boron nitride onto the tribological properties of the oil base. Keywords: graphene, hexagonal boron nitride, graphene oxide, oil base

Facile synthesis and characterization of a reduced graphene oxide/halloysite nanotubes/hexagonal boron nitride (RGO/HNT/h-BN) hybrid nanocomposite and its potential application in hydrogen storage

RSC Advances ◽  
2016 ◽  
Vol 6 (82) ◽  
pp. 79072-79084 ◽  
Author(s):  
R. Naresh Muthu ◽  
S. Rajashabala ◽  
R. Kannan
Keyword(s):  
Graphene Oxide ◽  
Boron Nitride ◽  
Hydrogen Storage ◽  
Reduced Graphene Oxide ◽  
Hexagonal Boron Nitride ◽  
Halloysite Nanotubes ◽  
Hybrid Nanocomposites ◽  
Reduced Graphene ◽  
Hydrogen Storage Performance

The hydrogen storage performance of hybrid nanocomposites composed of reduced graphene oxide, acid treated halloysite nanotubes and hexagonal boron nitride nanoparticles (RGO/A-HNT/h-BN) was studied.

scholarly journals Electrical transport properties of Si-doped hexagonal boron nitride epilayers

AIP Advances ◽  
2013 ◽  
Vol 3 (12) ◽  
pp. 122116 ◽  
Author(s):  
S. Majety ◽  
T. C. Doan ◽  
J. Li ◽  
J. Y. Lin ◽  
H. X. Jiang
Keyword(s):  
Boron Nitride ◽  
Transport Properties ◽  
Electrical Transport ◽  
Hexagonal Boron Nitride ◽  
Electrical Transport Properties ◽  
Si Doped

Three dimensional nanocomposite of reduced graphene oxide and hexagonal boron nitride as an efficient metal-free catalyst for oxygen electroreduction

2016 ◽  
Vol 4 (12) ◽  
pp. 4506-4515 ◽  
Author(s):  
Indrajit M. Patil ◽  
Moorthi Lokanathan ◽  
Bhalchandra Kakade
Keyword(s):  
Graphene Oxide ◽  
Boron Nitride ◽  
Reduced Graphene Oxide ◽  
Hexagonal Boron Nitride ◽  
Three Dimensional ◽  
Oxygen Electroreduction ◽  
Onset Potential ◽  
Metal Free ◽  
Reduced Graphene ◽  
Orr Kinetics

Excellent ORR kinetics by an h-BN/rGO nanocomposite is shown with an onset potential ∼0.8 V vs. RHE, attributed to the segregation mechanism and coalescence of graphitic planes of h-BN and rGO.

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