Thermal conductivity and mechanical performance of hexagonal boron nitride nanosheets-based epoxy adhesives

Wang, Shuo; Xue, Hongqian; Araby, Sherif; Demiral, Murat; Han, Sensen; Cui, Can; Zhang, Rui; Meng, Qingshi

doi:10.1088/1361-6528/ac0470

Cited by 11 publications

(7 citation statements)

References 47 publications

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“…GO causes rigidity enhancement of the PVA chain to restrict the movement of the molecular chains, leading to a high Young's modulus [46,47]. Tensile strength and elongation at break commonly drop after a certain weight percentage while the Young's modulus continues to rise [48,49].…”

Section: Mechanical Measurementsmentioning

confidence: 99%

Porous polyvinyl alcohol/graphene oxide composite film for strain sensing and energy-storage applications

Guo

Araby

et al. 2022

Nanotechnology

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In this study, a flexible porous polyvinyl alcohol (PVA)/graphene oxide (GO) composite film was developed and tested for flexible strain sensing and energy-storage applications. Morphology and mechanical properties were studied; tensile strength and Young’s modulus increased by 225% and 86.88%, respectively, at 0.5 wt% GO. The PVA/GO film possesses exceptional sensing ability to various mechanical strains, such as tension, compression, bending, and torsion. For example, the gauge factor of the PVA/GO film as a tensile-strain sensor was measured as 2.46 (246%). Under compression loads, the PVA/GO composite film showed piezoresistive and capacitive strain-sensing characteristics. Under 5 kPa of compression load, the relative resistance increased by 81% with a 100 msec response time; the relative capacitance increased by 160% with a 120 msec response time. The PVA/GO strain sensor exhibited high durability and reliability over 20 × 103 cycles of tensile strain and bending at 3.33 Hz. Moreover, the PVA/GO composite film showed good electrochemical properties due to its porous structure; the maximum capacitance was 124.7 F g−1 at 0.5 wt% GO. After 20 × 103 charging–discharging cycles, the capacitance retention rate was 94.45%, representing high stable capacitance performance. The results show that electrically conductive porous PVA nanocomposite films are promising candidates for strain sensing and energy-storage devices.

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Section: Mechanical Measurementsmentioning

confidence: 99%

Porous polyvinyl alcohol/graphene oxide composite film for strain sensing and energy-storage applications

Guo

Araby

et al. 2022

Nanotechnology

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“…In addition, various intelligent multi-functional fabrics with outstanding thermal management ability have also been reported in the literature. 15−17 One of the frequently reported strategies for producing thermal adhesives is to modify resins with thermal nanofillers, e.g., graphene, 18 boron nitride nanosheets (BNNSs), 19,20 and multi-walled carbon nanotubes (MWCNTs). 21 They possess ultrahigh specific surface area, excellent thermal properties, and unique micro topography, making them capable of effectively improving the thermal transfer ability of adhesive resins even under relatively low concentrations.…”

Section: Introductionmentioning

confidence: 99%

In Situ Constructing High-Performance, Recyclable Thermally Conductive Adhesives with a Hyperbranched-Star Reversibly Cross-Linking Structure

Song

Yue

et al. 2023

ACS Appl. Polym. Mater.

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Thermally conductive adhesives have attracted considerable attention in recent years due to their dual functions in promoting interfacial bonding and thermal transfer. A great number of strategies have been explored for producing them. However, most of them are based on irreversible covalent cross-linking resins, which are difficult to be recycled. Herein, we demonstrate a strategy for in situ producing high-performance, recyclable thermal adhesives from common stocks with a reversibly cross-linkable hyperbranched-star copolymer, HBPE@PSF. The copolymer possesses a hyperbranched polyethylene core covalently bearing multiple polystyrene side chains with small amount of furan moieties, which can be synthesized from commercially available ethylene and styrene as the main monomers. As a stabilizer, the copolymer can effectively promote the exfoliation of hexagonal boron nitride (h-BN) in chloroform under sonication to render high-quality boron nanosheets (BNNSs). Moreover, some of the copolymer can be irreversibly adsorbed on the BNNS surface based on the noncovalent CH−π and π–π interactions. From the resultant nanofiller, BNNS/HBPE@PSF composite adhesives have been successfully prepared through an in situ solution cast process directly with the copolymer as the matrix. After the cross-linking via the Diels–Alder reaction, the resultant adhesives simultaneously exhibit excellent interfacial bonding, thermal transfer, and recyclability, despite their extremely low furan content, 0.30 mol %. This has been confirmed to originate from the unique chain structure of the copolymer, which can form a hyperbranched-star, reversibly cross-linking structure in the composite system. The composite adhesives obtained herein may find their important applications as thermal interface materials in the areas of various electronic products.

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“…Han and Elliott [22] studied the elastic behavior of CNT reinforced polymer nanocomposite and reported the elastic modulus as 94.6 GPa and 138.9 GPa for 12% and 17% volume fractions of CNT, respectively. Wang et al [24] studied the thermal conductivity and mechanical performance of boron nitride nanosheets (BNNS) based epoxy adhesives and found that addition of 1 wt% BNNS in epoxy enhances the Young's modulus, lap shear strength, fracture toughness and energy release rate by 69%, 31%, 122% and 118%, respectively. Lago et al [25] studied the dependence of the polycarbonate mechanical performances on boron nitride fakes morphology and observed the difference in Young's modulus of 56 MPa, being the increment, compared to pristine polycarbonate with 0.1 wt% of loading.…”

Section: Introductionmentioning

confidence: 99%

Evaluating the elastic behaviour of boron nitride nanotube (BNNT) reinforced phenolic nanocomposites

Sinha,

Kumar,

Goel

et al. 2023

Eng. Res. Express

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The present analysis concerns investigation of the elastic behavior of boron nitride nanotube (BNNT)-reinforced phenolic nanocomposite using molecular dynamics (MD) simulations. In the investigation, an armchair BNNT with chiral vectors (10, 10) was used as reinforcement and novolac-type phenolic chains and formaldehyde mixture was used as a matrix. The crosslinking of phenolic chains and formaldehyde mixture was achieved to obtain the three-dimensional crosslinked structure reinforced with BNNT. In addition to the tensile elastic modulus, the glass transition temperature was evaluated for the bulk phenolic resin and the nanocomposite using the density-temperature relationship. Based on the results, it was concluded that 6.8 % (volume fraction) of BNNT can enhance the elastic modulus of the composite by ~15 times. Poisson’s ratio was found to be independent of the mixing ratio. It was also observed that reinforcement with BNNT can enhance the glass transition temperature of the nanocomposite. Continuum-based rule of mixture showed a good correlation with the MD predictions.

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Thermal conductivity and mechanical performance of hexagonal boron nitride nanosheets-based epoxy adhesives

Cited by 11 publications

References 47 publications

Porous polyvinyl alcohol/graphene oxide composite film for strain sensing and energy-storage applications

Porous polyvinyl alcohol/graphene oxide composite film for strain sensing and energy-storage applications

In Situ Constructing High-Performance, Recyclable Thermally Conductive Adhesives with a Hyperbranched-Star Reversibly Cross-Linking Structure

Evaluating the elastic behaviour of boron nitride nanotube (BNNT) reinforced phenolic nanocomposites

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