Solution-processable thermally conductive polymer composite adhesives of benzyl-alcohol-modified boron nitride two-dimensional nanoplates

Jung, Daewoong; Kim, Jun Min; Yoon, Hyun-Woo; Nam, Ki Min; Kwon, Yong-Eun; Jeong, Sooyeol; Baek, Young Hee; Choi, Yeon Suk; Chang, Sung‐Jin; Yi, Gi‐Ra; Cho, Jung Young; Lee, Gaehang

doi:10.1016/j.cej.2018.12.128

Cited by 42 publications

(14 citation statements)

References 41 publications

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“…With this, a large number of charge carrier develops at the interface and the developed material shows decrement in dielectric constant with increment in frequency. [28] Similar behavior for neat polymer and their composites are obtained by Konieczna et al [29] when they were studying the dielectric constant of polyethylene terephthalate and polyphenylene sulfide and their composites with barium titanate.…”

Section: Dielectric Constantsupporting

confidence: 65%

“…With the reduction in the distance between the molecules in this multi-phase system, hindrance between the molecules increases and with this increased hindrance, expansion of combination gets suppressed. [27] Jung et al [28] reported a similar decrement in CTE of epoxy resin when reinforced with surface modified boron nitride with benzyl alcohol.…”

Section: Coefficient Of Thermal Expansionmentioning

confidence: 78%

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An experimental investigation of epoxy‐based hybrid composites with hexagonal boron nitride and short sisal fiber as reinforcement for high performance microelectronic applications

Agrawal

Chandraker

2021

Polymer Engineering & Sci

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In the present article, an investigation is presented on epoxy-based composites where the discontinuous phases are microsized boron nitride and sisal fiber (SF). Both the reinforcing materials are surface modified before incorporating them into the epoxy matrix. Hexagonal boron nitride (hBN) surface is treated by silane-coupling agent, whereas the aqueous NaOH solution is used to modify the surface of SF. The effect of fillers on the physical, mechanical, thermal, and dielectric properties of hybrid composites is studied through experimentation. The result shows that the inclusion of hBN increases the thermal conductivity of epoxy appreciably and dielectric constant marginally, while the inclusion of SF reduces the thermal conductivity marginally and dielectric constant appreciably. The maximum thermal conductivity of 1.88 W/m-K is obtained for the combination of 30 wt% hBN and 3 wt% SF. For the same combination, the dielectric constant is 4.57 at 1 GHz, which is almost similar to neat epoxy. Also, other properties like compressive strength, hardness, glasstransition temperature, and coefficient of thermal expansion improve when combinations of ceramic filler and natural fiber were incorporated in the epoxy matrix. Due to outstanding comprehensive properties, epoxy/hBN/SF composites found potential application in wide microelectronic applications.

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Section: Dielectric Constantsupporting

confidence: 65%

Section: Coefficient Of Thermal Expansionmentioning

confidence: 78%

An experimental investigation of epoxy‐based hybrid composites with hexagonal boron nitride and short sisal fiber as reinforcement for high performance microelectronic applications

Agrawal

Chandraker

2021

Polymer Engineering & Sci

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“…Figure 5b shows the in-plane thermal conductivities (λ) of the ANF/BNNS, ANF/GO-5/BNNS, and ANF/GO-10/BNNS thermally conductive composite films, respectively. The values of λ for the composite films were calculated from Equation (1) using the measurement results of C p , α, and ρ [27]:…”

Section: Resultsmentioning

confidence: 99%

Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet

Wei

et al. 2021

Nanomaterials

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Dielectric materials with excellent thermally conductive and mechanical properties can enable disruptive performance enhancement in the areas of advanced electronics and high-power devices. However, simultaneously achieving high thermal conductivity and mechanical strength for a single material remains a challenge. Herein, we report a new strategy for preparing mechanically strong and thermally conductive composite films by combining aramid nanofibers (ANFs) with graphene oxide (GO) and edge-hydroxylated boron nitride nanosheet (BNNS-OH) via a vacuum-assisted filtration and hot-pressing technique. The obtained ANF/GO/BNNS film exhibits an ultrahigh in-plane thermal conductivity of 33.4 Wm−1K−1 at the loading of 10 wt.% GO and 50 wt.% BNNS-OH, which is 2080% higher than that of pure ANF film. The exceptional thermal conductivity results from the biomimetic nacreous “brick-and-mortar” layered structure of the composite film, in which favorable contacting and overlapping between the BNNS-OH and GO is generated, resulting in tightly packed thermal conduction networks. In addition, an outstanding tensile strength of 93.3 MPa is achieved for the composite film, owing to the special biomimetic nacreous structure as well as the strong π−π interactions and extensive hydrogen bonding between the GO and ANFs framework. Meanwhile, the obtained composite film displays excellent thermostability (Td = 555 °C, Tg > 400 °C) and electrical insulation (4.2 × 1014 Ω·cm). We believe that these findings shed some light on the design and fabrication of multifunctional materials for thermal management applications.

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“…However, the alcohol TPD profiles of Au/BN c all exhibited a close desorption behavior, and the desorption temperatures are in between p BN and Au/ p BN (Figure S6). The aromatic compounds could be adsorbed onto the p BN surface through π–π interactions. , It was supposed that the Au nanoparticles can distribute electrons to the nearby p BN support, enhancing its interaction with the alcohols. In addition, the desorption gap of 100 °C between the benzyl alcohol and CH 3 OH is mainly due to the presence of π–π interactions between the p BN and benzyl alcohol.…”

Section: Resultsmentioning

confidence: 99%

Insight into the Effective Aerobic Oxidative Cross-Esterification of Alcohols over Au/Porous Boron Nitride Catalyst

Zhang

Yang

Zheng

et al. 2019

ACS Appl. Mater. Interfaces

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Boron nitride (BN) has attracted great attention with an unexpected ability in aerobic catalysis. Still, its related probe reactions are relatively rare, and the effect of the BN-supported metal catalyst on O 2 activation is still ambiguous, and opinions are varied. In this work, the porous BN (pBN)-supported Au catalyst with a porous structure and exposed edges exhibits high activity in the oxidative crossesterification reactions between the aromatic and C 1 −C 3 aliphatic alcohols at ambient temperature. The turnover frequency value for methyl benzoate is 118 h −1 at 30 °C, and the calculated apparent activation energy (Ea, 58 kJ/mol) is comparable to that of AuPd/TiO 2 , Ru/Al 2 O 3 , and PdBiTe catalysts. Combined with temperatureprogrammed desorption (TPD) results, the loading of Au enhances the desorption of O 2 and the interaction with alcohols; thus, a synergistic effect between the O-rich pBN and Au is considered. The free-radical scavenger can dramatically suppress the conversion (∼6%), suggesting that the reaction proceeds via the O 2 * radicals. According to the vibration of ν O−O , δ OO−H , and ν B−O−O−B detected by attenuated total reflectance-infrared spectroscopy (ATR-IR), we are prone to consider the oxygen activation route by the edge B atoms. Then, a possible L−H reaction mechanism was proposed: benzyl alcohol and O 2 adsorb on the Au/pBN initially, then O 2 is converted to O 2 *, and the α-H elimination proceeds; as the semi-acetal formed, another α-H elimination proceeds and methyl benzoate is finally formed.

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Solution-processable thermally conductive polymer composite adhesives of benzyl-alcohol-modified boron nitride two-dimensional nanoplates

Cited by 42 publications

References 41 publications

An experimental investigation of epoxy‐based hybrid composites with hexagonal boron nitride and short sisal fiber as reinforcement for high performance microelectronic applications

An experimental investigation of epoxy‐based hybrid composites with hexagonal boron nitride and short sisal fiber as reinforcement for high performance microelectronic applications

Robust Biomimetic Nacreous Aramid Nanofiber Composite Films with Ultrahigh Thermal Conductivity by Introducing Graphene Oxide and Edge-Hydroxylated Boron Nitride Nanosheet

Insight into the Effective Aerobic Oxidative Cross-Esterification of Alcohols over Au/Porous Boron Nitride Catalyst

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