Enhancement of thermal conductivity of BN/epoxy composite through surface modification with silane coupling agents

Jang, Inseok; Shin, Kyung-Ho; Yang, Il Seung; Kim, Hyeon; Kim, Juseong; Kim, Wan-Ho; Jeon, Sie-Wook; Kim, Jae-Pil

doi:10.1016/j.colsurfa.2017.01.011

Cited by 95 publications

(49 citation statements)

References 25 publications

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“…The band at 1094 cm −1 is attributed to the CO stretch . The observed bands at 2919 cm −1 and 2870 cm −1 represent the asymmetrical and symmetrical stretching of CH 3 and CH 2 groups, respectively . The FTIR spectrum of the f‐CNF (Figure B), however, demonstrates an additional weak band at 900 cm −1 which is related to the formation of the SiOC bond .…”

Section: Resultsmentioning

confidence: 96%

Property improvement of a fibrous composite using functionalized carbon nanofibers

Anjabin

Khosravi

2019

Polymer Composites

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This work focuses on the preparation and characterization of multiscale epoxymatrix composites reinforced by basalt fibers and carbon nanofiber (CNF). CNF powders were first functionalized with 3-aminopropyltrimethoxysilane and characterized by Fourier-transform infrared spectroscopy, and thermogravimetric analysis; then, the epoxy resin was incorporated with 0.05 wt%, 0.1 wt%, 0.3 wt%, and 0.5 wt% f-CNF. The influence of functionalized-CNF (f-CNF) loading on the interlaminar shear strength (ILSS), tensile, and wear behaviors of the multiscale basalt fiber/epoxy composites was studied. Whereas a relatively small improvement (12%) in tensile strength was achieved, a remarkable enhancement in ILSS (73%) was obtained for the multiscale specimen with an f-CNF loading of 0.3 wt%. Also, the multiscale specimen filled with 0.5 wt% f-CNF showed an improvement of 37% in tensile modulus. The wear rate and friction coefficient of the 0.3 wt% f-CNF loaded composite were decreased by 56% and 38% with respect to the neat specimen, respectively. To establish the microstructure-property relationship, the worn and fractured surfaces of the specimens were analyzed. K E Y W O R D Sbasalt fibers, carbon nanofibers, fibrous composites, mechanical properties, wear

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Section: Resultsmentioning

confidence: 96%

Property improvement of a fibrous composite using functionalized carbon nanofibers

Anjabin

Khosravi

2019

Polymer Composites

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“…The new absorption peaks at 2925, 1037, and 987 cm −1 in the APTS‐BNNSs can be ascribed to the presence of C‐H stretching vibration of the ‐CH 2 ‐ groups and the Si‐O stretching, suggesting that the silane coupling agent APTS is linked on the h‐BNNSs . Furthermore, the intensity of the broad absorption band around 3400 cm −1 reduces remarkably, which is related to the reaction of the ethoxy groups of the APTS with the hydroxyl groups on the surface of h‐BNNSs through covalent attachment . The shift in the B‐O band from 1086 to 1135 cm −1 further confirms covalent attachment of functional molecules to the surface of the h‐BNNSs and excludes simple physical adsorption of the molecules.…”

Section: Resultsmentioning

confidence: 91%

Covalent Functionalized Boron Nitride Nanosheets as Efficient Lubricant Oil Additives

Wang

Han

et al. 2019

Adv Materials Inter

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Hexagonal boron nitride nanosheets (h‐BNNSs) are obtained by a chemical exfoliation method from bulk h‐BN powders. The surface of h‐BNNSs is functionalized with 3‐aminopropyltriethoxysilane (APTS). Further, the amino functional groups on the surface of APTS‐modified h‐BNNSs (APTS‐BNNSs) are reacted with 4‐carboxyphenylboronic acid (CPBA) to obtain the covalently linked CPBA‐BNNSs. The morphology and structure of h‐BNNSs, APTS‐BNNSs, and CPBA‐BNNSs are comprehensively discussed. Of all the above four additives, the CPBA‐BNNSs can most outstandingly improve friction‐reducing and antiwear capacities of 150N base oil. The CPBA‐BNNSs possess excellent dispersion stability in base oil due to the phenylboronic acid groups on the surface of h‐BNNSs. Only 0.075 wt% CPBA‐BNNSs is added into the base oil, the coefficient of friction is decreased by 32.3%, and the wear scar diameter and mean wear volume of the rubbing surface are reduced by 42.9% and 88.4%. The analysis of the worn scar surface demonstrates that CPBA‐BNNSs can form a protective tribofilm containing boron and nitrogen elements on the rubbing surfaces, thereby decreasing the friction and protecting the surfaces from wear. Thus, the CPBA‐BNNSs may be recommended as a potential lubricant additive in practical applications.

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“…The XPS spectrum can reveal the composition of elements contained in a substance surface accurately. [34,35]. Moreover, energy bandwidth between Ag3d5/2 (366.6 eV) and Ag3d3/2 (372.6 eV) is 6 eV, meaning that the AgNPs are distributed on the surface of BNNSs in a form of granular [34].…”

Section: Morphology Characterization and Performances Measurementmentioning

confidence: 99%

Synergistic Effects of Boron Nitride (BN) Nanosheets and Silver (Ag) Nanoparticles on Thermal Conductivity and Electrical Properties of Epoxy Nanocomposites

Zhang

Negi

et al. 2020

Polymers

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Polymer composites, with both high thermal conductivity and high electrical insulation strength, are desirable for power equipment and electronic devices, to sustain increasingly high power density and heat flux. However, conventional methods to synthesize polymer composites with high thermal conductivity often degrade their insulation strength, or cause a significant increase in dielectric properties. In this work, we demonstrate epoxy nanocomposites embedded with silver nanoparticles (AgNPs), and modified boron nitride nanosheets (BNNSs), which have high thermal conductivity, high insulation strength, low permittivity, and low dielectric loss. Compared with neat epoxy, the composite with 25 vol% of binary nanofillers has a significant enhancement (~10x) in thermal conductivity, which is twice of that filled with BNNSs only (~5x), owing to the continuous heat transfer path among BNNSs enabled by AgNPs. An increase in the breakdown voltage is observed, which is attributed to BNNSs-restricted formation of AgNPs conducting channels that result in a lengthening of the breakdown path. Moreover, the effects of nanofillers on dielectric properties, and thermal simulated current of nanocomposites, are discussed.

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Enhancement of thermal conductivity of BN/epoxy composite through surface modification with silane coupling agents

Cited by 95 publications

References 25 publications

Property improvement of a fibrous composite using functionalized carbon nanofibers

Property improvement of a fibrous composite using functionalized carbon nanofibers

Covalent Functionalized Boron Nitride Nanosheets as Efficient Lubricant Oil Additives

Synergistic Effects of Boron Nitride (BN) Nanosheets and Silver (Ag) Nanoparticles on Thermal Conductivity and Electrical Properties of Epoxy Nanocomposites

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