An aqueous-only, green route to exfoliate boron nitride for preparation of high thermal conductive boron nitride nanosheet/cellulose nanofiber flexible film

Hu, Zhuorong; Wang, Shan; Chen, Guokang; Zhang, Qian; Wu, Kun; Shi, Jun; Liang, Liyan; Lu, Mangeng

doi:10.1016/j.compscitech.2018.09.020

Cited by 91 publications

(56 citation statements)

References 49 publications

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“…The h-BN nanosheets consist of mono-layered h-BN planes. The 2D h-BN nanosheets are exfoliated from bulk h-BN by long term sonication similar to the process adopted in [20]. Fig.…”

Section: Materials and Methodologymentioning

confidence: 99%

Investigation of the Dielectric and Thermal Properties of Non-Edible Cottonseed Oil by Infusing h-BN Nanoparticles

et al. 2020

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Vegetable oils have emerged as insulating fluids in transformer applications and as a prominent and effective alternative for traditional dielectric fluids. However, most of vegetable oils are edible causing their application on a large scale to be limited. In the present work, a novel non-edible vegetable oil is developed as an insulating fluid. The developed oil is oxidation-inhibited cottonseed oil (CSO) based nanofluids. Tertiary butylhydroquinone was used as antioxidant. The concept of nanofluids was used to overcome the limited dielectric and thermal properties of cottonseed oil. Hexagonal Boron Nitride (h-BN) nanoparticles at low weight fractions (0.01 -0.1 wt%) were proposed as nanofillers to achieve adequate dielectric strength and improved thermal conductivity. Stability of prepared CSO based nanofluids was analyzed using Ultraviolet-visible (UV-Vis) spectroscopy. Then, the prepared nanofluids were tested for dielectric and thermal properties under a temperature range between 45 • C and 90 • C. The dielectric properties include breakdown strengths under AC and lightning impulse voltages, dielectric constant, dissipation factor, and resistivity, while thermal properties include thermal conductivity and thermogram analysis. The dielectric and thermal properties were significantly improved in CSO based nanofluids. The creation of electric double layer at nanoparticle/oil interface and the lattice vibration of nanoparticles were used to clarify the obtained results. The proposed CSO based h-BN nanofluids open up a great opportunity in both natural ester insulating fluid applications and thermal energy management systems. INDEX TERMSVegetable oils, transformers, nanofluids, dielectric properties, thermal properties. NOMENCLATURE b Absorbance in y intercept BDV Breakdown voltage [kV] c p Specific heat capacity [J/(kg.K)] CSO Cottonseed oil EDL Electric Double Layer Enh. Enhancement h-BN Hexagonal Boron Nitride k B Boltzmann constant [1.3806505e −23 J/K] LI Lightning impulse m Coefficient of molar extinction [M −1 .cm −1 ] NEIO Natural ester insulating oil The associate editor coordinating the review of this manuscript and approving it for publication was Jenny Mahoney.

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“…The h-BN nanosheets consist of mono-layered h-BN planes. The 2D h-BN nanosheets are exfoliated from bulk h-BN by long term sonication similar to the process adopted in [20]. Fig.…”

Section: Materials and Methodologymentioning

confidence: 99%

Investigation of the Dielectric and Thermal Properties of Non-Edible Cottonseed Oil by Infusing h-BN Nanoparticles

et al. 2020

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“…More environmentally-aware works aiming similar scheme have been published recently. A method to prepare h-BN nanosheet/CNF composite films without utilizing organic solvents was reported [82]. A soy-derived protein was employed for surface modification of h-BN nanosheets to obtain h-BN nanosheets/CNF composites [83].…”

Section: Nanocelluloses As Composite Scaffoldsmentioning

confidence: 99%

Nanocelluloses and Related Materials Applicable in Thermal Management of Electronic Devices: A Review

2020

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Owing to formidable advances in the electronics industry, efficient heat removal in electronic devices has been an urgent issue. For thermal management, electrically insulating materials that have higher thermal conductivities are desired. Recently, nanocelluloses (NCs) and related materials have been intensely studied because they possess outstanding properties and can be produced from renewable resources. This article gives an overview of NCs and related materials potentially applicable in thermal management. Thermal conduction in dielectric materials arises from phonons propagation. We discuss the behavior of phonons in NCs as well.

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“…68 Boron nitride platelets were also combined with CNF, to enhance thermal conductivity. 50,69,70 For nanocomposites based on cellulosic polymers and GO, the data for mechanical properties are oen low, and much lower than theoretical predictions from composite micromechanics. This is true for solvent cast methyl cellulose-GO 71 and dissolved and regenerated cellulose-GO.…”

Section: Introductionmentioning

confidence: 96%

Strong reinforcement effects in 2D cellulose nanofibril–graphene oxide (CNF–GO) nanocomposites due to GO-induced CNF ordering

Mianehrow

Carosio

et al. 2020

J. Mater. Chem. A

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An aqueous-only, green route to exfoliate boron nitride for preparation of high thermal conductive boron nitride nanosheet/cellulose nanofiber flexible film

Cited by 91 publications

References 49 publications

Investigation of the Dielectric and Thermal Properties of Non-Edible Cottonseed Oil by Infusing h-BN Nanoparticles

Investigation of the Dielectric and Thermal Properties of Non-Edible Cottonseed Oil by Infusing h-BN Nanoparticles

Nanocelluloses and Related Materials Applicable in Thermal Management of Electronic Devices: A Review

Strong reinforcement effects in 2D cellulose nanofibril–graphene oxide (CNF–GO) nanocomposites due to GO-induced CNF ordering

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