Thermal Conductivity Performance of 2D hBN/MoS2/Hybrid Nanostructures Used on Natural and Synthetic Esters.

Jaime Taha-Tijerina,Anna Paula Godoy,Josué Marciano De Oliveira Cremonezzi,Milene Adriane Luciano,Ricardo Jorge Espanhol Andrade,Marcos Antônio Gimenes Benega,Samuel Castro,Karla Aviña,Juan Manuel Martínez,Guilhermino José Macedo Fechine,Hélio Ribeiro,Ganguli Babu

doi:10.3390/nano10061160

Abstract

In this paper, the thermal conductivity behavior of synthetic and natural esters reinforced with 2D nanostructures—single hexagonal boron nitride (h-BN), single molybdenum disulfide (MoS2), and hybrid h-BN/MOS2—were studied and compared to each other. As a basis for the synthesis of nanofluids, three biodegradable insulating lubricants were used: FR3TM and VG-100 were used as natural esters and MIDEL 7131 as a synthetic ester. Two-dimensional nanosheets of h-BN, MoS2, and their hybrid nanofillers (50/50 ratio percent) were incorporated into matrix lubricants without surfactants or additives. Nanofluids were prepared at 0.01, 0.05, 0.10, 0.15, and 0.25 weight percent of filler fraction. The experimental results revealed improvements in thermal conductivity in the range of 20–32% at 323 K with the addition of 2D nanostructures, and a synergistic behavior was observed for the hybrid h-BN/MoS2 nanostructures.

Highlights

For over a century, fossil fuels have been the major contributor to the energy sector
The addition of Thermal tMranosSp2ortwpithheinnomneantaurinal esters showed an improvement nanofluids was influenced by physical trend similar and chemical to hexagonal boron nitride (h-boron nitride (BN))
It is suggested that due to the low filler fraction used, the observed enhancement on thermal conductivity is due to molecular interactions between the fluid and the 2D

Summary

Introduction

Fossil fuels have been the major contributor to the energy sector. Two-dimensional nanomaterials appear as an attractive alternative due to the high surface area they possess for heat transfer Among these 2D nanomaterials are hexagonal boron nitride (h-BN) and molybdenum disulfide (MoS2), which are suitable for development of high-performance composites applied in several industrial and technological sectors due to their exceptional electrical, thermal, and mechanical properties [37,38,39]. In this sense, hexagonal boron nitride (h-BN) is investigated in this study, since it is applied to several substrates to reduce viscosity and increase thermal conductivity [7,24,37,38,39,40,41]. The nanofluids with only h-BN or MoS2 nanofiller components were compared with their hybrid h-BN/MoS2 combination

Materials and Methods

Conclusions

Findings

56. GE Prolec—VG-100