Large scale synthesis of hexagonal boron nitride nanosheets and their use in thermally conductive polyethylene nanocomposites

Ali, Mehamed; Abdala, Ahmed

doi:10.1002/er.7149

Cited by 9 publications

(6 citation statements)

References 56 publications

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“…Ali et al explored the influence of milling parameters on the quality and yield of BNNS. 54 It was found that the optimum milling conditions are a ratio of 10:1 ball to powder and rotation speed of 250 rpm. Besides, the introduction of ball milling additives is also conductive to achieving their synergistic surface functionalization.…”

Section: Mechanical Exfoliationmentioning

confidence: 99%

“…Moreover, the lateral diameter and yield of BNNS are closely related to the ball milling parameters, including the ball size, extra additives, speed, and time. Ali et al explored the influence of milling parameters on the quality and yield of BNNS 54 . It was found that the optimum milling conditions are a ratio of 10:1 ball to powder and rotation speed of 250 rpm.…”

Section: Preparation Of Bnnsmentioning

confidence: 99%

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Controllable exfoliation of hexagonal boron nitride and tailored three‐dimensional network for highly thermally conductive polymer composites

Lin,

Dong,

Chen

et al. 2023

J of Applied Polymer Sci

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Thermally conductive but electrically insulating composites have become significant components for efficient thermal dissipation in electronic devices due to their miniaturization, integration, and functionalization. Over the past decade, extensive efforts have been dedicated to improving the thermal conductivity of polymer‐based composites through incorporating various thermally conductive fillers. In particular, boron nitride nanosheets (BNNS) with outstanding intrinsic thermal conductivity, electrical insulation, and chemical stability, have sparked intensive interest from researchers. However, BNNS usually suffers from severe aggregation in polymer matrices, leading to high interfacial thermal resistance. Rational construction of three‐dimensional (3D) BNNS continuous networks is crucial for efficient thermal transport and has also been established as a feasible and effective approach to achieve significant enhancement of thermal conductivity for polymer/BNNS composites. In this brief review, we summarized and introduced recent progress on the controllable exfoliation of h‐BN and tailored three‐dimensional networks for highly thermally conductive polymer composites. The fabrication strategies for 3D BNNS networks and the structure–properties relationships of polymer/BNNS composites are highlighted. Finally, the opportunities and challenges for polymer/BNNS composites based on 3D thermally conductive networks are prospected.

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Section: Mechanical Exfoliationmentioning

confidence: 99%

Section: Preparation Of Bnnsmentioning

confidence: 99%

Controllable exfoliation of hexagonal boron nitride and tailored three‐dimensional network for highly thermally conductive polymer composites

Lin,

Dong,

Chen

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Besides the improved optical properties and chemical stability; with their high surface area, they reduce interchain mobility and improve the mechanical and thermal properties of polymers. Due to their fascinating properties, they have great potential in various applications including coatings, automotive, catalysts, medicine, sensors, electronics, high-resolution imaging, energy storage, water purification, and UV emitters [16][17][18][19]. The h-BNNs can be prepared by using various methods.…”

Section: Introductionmentioning

confidence: 99%

Processing and Characterization of Polypropylene Nanocomposite Films Reinforced with Hexagonal Boron Nitride Nanosheets

Bayramoğlu

Mudu²

2023

Period. Polytech. Chem. Eng.

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In this study, we synthesized hexagonal boron nitride nanosheets (h-BNN) via the molten hydroxide exfoliation method which results in small flakes and nanoscrolls. The resultant h-BNNs can be dispersed in various solvents such as water, ethanol, and acetone, and form a stable dispersion. The morphological and structural analysis of h-BNNs were performed with Fourier Transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), and scanning electron microscopy (SEM). The masterbatch (MB) method was used to incorporate the h-BNNs into the polypropylene (PP) matrix via melt mixing. Dilution and film production processes were performed using a twin screw extruder. Nanocomposite films having an h-BNN weight ratio of 1%, 2%, 3%, and 5% were prepared. Thermogravimetric analyzer (TGA) and differential scanning calorimetry (DSC) were used to investigate the thermal stability. Crystallization (Tc) temperatures were increased with the increased amount of h-BNNs and h-BNNs nucleating agent behavior on the PP crystallization was observed. Oxidation induction time (OIT) of the pure PP was increased from 8.84 min to 17.82 min. The results show a considerable effect of the h-BNN content on the thermo-oxidative stability of the nanocomposites studied. The rheological and mechanical properties of the PP-hBNN nanocomposite films were also determined depending on the particle loading ratio. Optimum particle content providing the best thermal, mechanical, and rheological properties were found to be 3% wt.

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“…It is interesting as well as challenging to study the elastic properties of BNNS due to the involvement of their atomistic structural parameters. Recent studies by Ali and Abdala [27] worked on the synthesis of h-BN by ball milling and analysed the effect of the same concerning speed and time, which resulted in enhancing the thermo-mechanical properties of nanocomposites. Choyal et al [28] investigated the effect of E on boron nitride nanotubes using MD simulation and found that the value of E increases as the AR increases.…”

Section: Introductionmentioning

confidence: 99%

Computational study on the effect of aspect ratio on Young’s modulus of boron nitride nanosheets

Kumari

Sarangi

2023

Phys. Scr.

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The effect of the aspect ratio on Young’s modulus (E) of boron nitride nanosheet (BNNS) was studied using molecular dynamics simulation techniques employing the Tersoff potential field. The aspect ratio (L/B) of BNNS may influence the elastic properties; therefore, the values are varied from 2 to 12. Our results revealed that the E of BNNS decreased with an increase in the aspect ratio up to 9 and then became stable in both armchair and zigzag directions. It is anticipated that the result will provide a beneficial understanding of the elastic properties of BNNS which can aid in the design and implementation of structured and tailored nanoelectromechanical devices, transistors, sensors, ultralight-weight materials and automotive sectors.

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Large scale synthesis of hexagonal boron nitride nanosheets and their use in thermally conductive polyethylene nanocomposites

Cited by 9 publications

References 56 publications

Controllable exfoliation of hexagonal boron nitride and tailored three‐dimensional network for highly thermally conductive polymer composites

Controllable exfoliation of hexagonal boron nitride and tailored three‐dimensional network for highly thermally conductive polymer composites

Processing and Characterization of Polypropylene Nanocomposite Films Reinforced with Hexagonal Boron Nitride Nanosheets

Computational study on the effect of aspect ratio on Young’s modulus of boron nitride nanosheets

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