A facile chemical exfoliation method to obtain large size boron nitride nanosheets

CrystEngComm ◽  
2013 ◽  
Vol 15 (9) ◽  
pp. 1782 ◽  
Author(s):  
Miao Du ◽  
Yongzhong Wu ◽  
Xiaopeng Hao
Keyword(s):  
Boron Nitride ◽  
Boron Nitride Nanosheets ◽  
Large Size ◽  
Chemical Exfoliation

Preparation of boron nitride nanosheets using a chemical exfoliation method as a thermal conductive filler for the development of silicone thermal composites Part I: effect of single- and hybrid-filler additions on the silicone composite performance

2019 ◽  
Vol 90 (5-6) ◽  
pp. 666-684
Author(s):  
Chung-Feng Jeffrey Kuo ◽  
Jiong-Bo Chen ◽  
Po-Yen Chen ◽  
Min-Yan Dong
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Free Radical ◽  
Reaction Time ◽  
Boron Nitride ◽  
Conductive Filler ◽  
Boron Nitride Nanosheets ◽  
Chemical Exfoliation ◽  
Hybrid Fillers

This study developed a nano-size filler as a thermally conductive filler for a silicone thermal pad (STP) by exfoliating hexagonal-boron nitride ( h-BN) with the chemical exfoliation-free radical polymerization method to produce boron nitride nanosheets (BNNSs). We used N,N-dimethylacrylamide as the intercalation agent. After polymerization, it became poly( N,N-dimethylacrylamide) to exfoliate the h-BN layer. BNNSs were taken as a single-filler and hybrid-fillers with Al2O3 and then compared with h-BN to investigate their effect on the silicone composite properties. As the free radical polymerization reaction time increased, the interlayer distance of BNNSs lengthened to 0.35 nm, while the thickness of h-BN sheets decreased. The X-ray diffractometer results showed how the h-BN (002) crystal plane was enhanced and displaced. The Fourier transform infrared spectra showed that the characteristic peaks of 1372 and 812 cm−1 were enhanced, and the Raman results showed that the E2 g displacement and full width at half maximum increased, thus validating the successful preparation of BNNSs. Based on the scanning electron microscope-transmission electron microscope results, BNNSs with 24-hour reaction time offered the best results with a thickness of 5 nm. The highest thermal conductivity reached 3.66 W m−1 K−1 with the addition of 50 wt% BNNSs, and tensile strength of up to 11.30 kg/cm2. Hybrid-fillers showed enhancement of thermal conductivity to 5.28 W m−1 K−1 and tensile strength to 7.32 kg cm−2. Finally, the STP showed that the volume resistance (>1010 Ω cm), withstand voltage (>10 kV mm−1), and flame resistance (V-0) of the STP prepared by this study comply with the industrial application specifications.

High-performance NO2 sensors based on spontaneously functionalized hexagonal boron nitride nanosheets via chemical exfoliation

Nanoscale ◽  
2019 ◽  
Vol 11 (45) ◽  
pp. 21909-21916 ◽  
Author(s):  
Yue He ◽  
Dongdong Li ◽  
Wei Gao ◽  
Hong Yin ◽  
Fang Chen ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Gas Sensors ◽  
High Performance ◽  
Hexagonal Boron Nitride ◽  
Boron Nitride Nanosheets ◽  
Chemical Exfoliation

Sulfate modified BNNS based gas sensors exhibit superior sensing performances, offering a powerful platform for NO2 sensing and/or capturing applications.

Scalable exfoliation for large-size boron nitride nanosheets by low temperature thermal expansion-assisted ultrasonic exfoliation

2017 ◽  
Vol 5 (25) ◽  
pp. 6359-6368 ◽  
Author(s):  
Feng Yuan ◽  
Weicheng Jiao ◽  
Fan Yang ◽  
Wenbo Liu ◽  
Jiayin Liu ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Low Temperature ◽  
Boron Nitride ◽  
High Yield ◽  
Simple Method ◽  
Boron Nitride Nanosheets ◽  
Large Size

Few-layer and large-size BNNSs with a high yield of 26% are successfully prepared by a simple method.

Preparation of boron nitride nanosheets using a chemical exfoliation method as a thermal conductive filler for the development of silicone thermal pads: Part II: Optimization of process parameter design on the development of a silicone thermal pad

2020 ◽  
Vol 90 (17-18) ◽  
pp. 1891-1905
Author(s):  
Chung-Feng Jeffrey Kuo ◽  
Po-Yen Chen ◽  
Jiong-Bo Chen
Keyword(s):  
Thermal Conductivity ◽  
Tensile Strength ◽  
Boron Nitride ◽  
Conductive Filler ◽  
Control Factor ◽  
Boron Nitride Nanosheets ◽  
Loading Level ◽  
Control Factors ◽  
Chemical Exfoliation ◽  
Lamella Thickness

This study developed a silicone thermal pad with high thermal conductivity and high mechanical properties. Boron nitride nanosheets (BNNSs) with different lamella thicknesses were prepared in Part I and Al2O3 was filled with silicone rubber to prepare silicone thermal pads. The silicone thermal pads were prepared using the Taguchi method and the elimination and choice translating reality method. BNNSs with different lamella thicknesses, BNNS loading level, and Al2O3 loading level were set as control factors for the experiment. The effect of the three sets of control factors on the thermal conductivity, tensile property, and hardness of the silicone thermal pads was discussed so as to determine the optimum product optimization process parameters. According to the experimental results, the optimum experimental combination was BNNSs with lamella thickness (B24), a BNNS loading level of 20 wt%, and an Al2O3 loading level of 60 wt%. The thermal conductivity of the silicone thermal pads prepared by thermosetting was 5.25 W/mK, the maximum tensile strength was 7.55 kg/cm2, and the Shore hardness was 65.2 (Shore A). Under identical conditions, the thermal conductivity and tensile strength were higher than that of commercially available silicone thermal pads by 34.48% and 20.26%, respectively. The control factor influencing the thermal conductivity and tensile strength of silicone thermal pads was the BNNS loading level, with contribution degrees of 34.66% and 50.13%, respectively. Accurate parameter settings could be obtained for silicone thermal pad processes.

scholarly journals Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

RSC Advances ◽  
2020 ◽  
Vol 10 (25) ◽  
pp. 14785-14793
Author(s):  
Hossein Tafrishi ◽  
Sadegh Sadeghzadeh ◽  
Fatemeh Molaei ◽  
Hossein Siavoshi
Keyword(s):  
Thermal Properties ◽  
Boron Nitride ◽  
Ambient Temperature ◽  
Phase Change ◽  
Phase Change Material ◽  
Thermal Energy ◽  
Hybrid Nanoparticles ◽  
Boron Nitride Nanosheets ◽  
Change Material

Octadecane is an alkane that is used to store thermal energy at ambient temperature as a phase change material.

scholarly journals 2D boron nitride nanosheets in PIM-1 membranes for CO2/CH4 separation

2021 ◽  
pp. 119527
Author(s):  
Ahmed W. Ameen ◽  
Jing Ji ◽  
Marzieh Tamaddondar ◽  
Sajjad Moshenpour ◽  
Andrew B. Foster ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Boron Nitride Nanosheets

Ion-induced coagulation of hexagonal boron nitride nanosheets in aqueous environment

2021 ◽  
Vol 44 ◽  
pp. 100475
Author(s):  
Xiaobin Zhu ◽  
Liang Zhang ◽  
Bin Zuo ◽  
Zhengcun Zhou ◽  
Yifei Yang ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Hexagonal Boron Nitride ◽  
Aqueous Environment ◽  
Boron Nitride Nanosheets
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