Highly thermal conductivity of PVA-based nanocomposites by constructing MWCNT-BNNS conductive paths

Zhou, Jianwei; Yu, Zi-Hao; Lv, Yarong; Hu, Ping; Liu, Yong

doi:10.1016/j.compositesa.2022.107195

Cited by 20 publications

(7 citation statements)

References 49 publications

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“…Based on our previous study, liquid-phase exfoliation was employed to prepare BNNSs. 2 g of h-BN was dispersed in 200 mL of mixed solvent (1:1 volume ratio of deionized water to IPA).…”

Section: Methodsmentioning

confidence: 99%

“…16−19 Among the various types of thermally conductive fillers, two-dimensional boron nitride nanosheets (BNNSs) have become an attractive choice for the preparation of insulating and thermally conductive composites because of their ultrahigh thermal conductivity, excellent electrical insulation properties, high thermal stability, and outstanding thermal expansion coefficient. 20,21 However, due to its twodimensional structure and high surface energy, BNNS undergoes stacking, resulting in agglomeration between nanosheets and reducing heat conduction paths between the sheets, which affect the formation of effective BNNS thermal conductivity networks. 22−25 Cao et al 26 process, avoiding serious agglomeration among BNNSs.…”

Section: Introductionmentioning

confidence: 99%

“…The most popular method to enhance the heat transfer performance of polymer composites is to incorporate different fillers with excellent thermal conductivity into the polymer matrix, such as carbon materials, ceramic fillers, and metal fillers. − Among the various types of thermally conductive fillers, two-dimensional boron nitride nanosheets (BNNSs) have become an attractive choice for the preparation of insulating and thermally conductive composites because of their ultrahigh thermal conductivity, excellent electrical insulation properties, high thermal stability, and outstanding thermal expansion coefficient. , However, due to its two-dimensional structure and high surface energy, BNNS undergoes stacking, resulting in agglomeration between nanosheets and reducing heat conduction paths between the sheets, which affect the formation of effective BNNS thermal conductivity networks. − Cao et al prepared polyimide (PI)/BNNS composites by hot-pressing PI microspheres coated with BNNSs. The microspheres are used to align BNNS with each other during the hot-pressing deformation process, avoiding serious agglomeration among BNNSs.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Constructing Hierarchical Polymer Nanocomposites with Strongly Enhanced Thermal Conductivity

Zhou,

Yu,

Mohideen

et al. 2023

ACS Appl. Mater. Interfaces

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“…Based on our previous study, liquid-phase exfoliation was employed to prepare BNNSs. 2 g of h-BN was dispersed in 200 mL of mixed solvent (1:1 volume ratio of deionized water to IPA).…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Constructing Hierarchical Polymer Nanocomposites with Strongly Enhanced Thermal Conductivity

Zhou,

Yu,

Mohideen

et al. 2023

ACS Appl. Mater. Interfaces

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“…The polymer composite exhibited excellent tensile strength and good electrical insulation. According to J Zhou et al [27], a hybrid nanocomposite of PVA filled with boron nitride nanosheet and multiwalled carbon nanotubes achieved 11.49 --Wm K 1 1 at 20% weight fraction compared to.819…”

Section: Introductionmentioning

confidence: 99%

MWCNTs polymer nanocomposite with enhanced thermomechanical properties and electrical insulation for effective encapsulation

Kumar

Singh

Tiwari

2023

Mater. Res. Express

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This study presents the effect of the variation in weight fraction of multiwall carbon nanotubes (MWCNTs) in polymer with the objective of enhancing the thermo-mechanical properties along with the electrical insulating properties. Polymer multi-walled nanocomposites (PMWCNC) and MWCNTs/Al2O3 bi-layer nanocomposites were prepared by solution mixing method with ultrasonication and magnetic stirring, then molded in vertical sandwich molds, made of acrylic and aluminum sheet as per ASTM standards. The tensile strength of PMWCNC was enhanced by 32%, 23%, 15%, and 5% compared to unmodified epoxy with the incorporation of 1 wt.%, 0.75 wt.%, 0.5 wt.%, and 0.25 wt.% of MWCNTs. The dispersion morphology of MWCNTs in epoxy was observed with field emission-scanning electron microscope (FE-SEM). The thermogravimetric analyzer (TGA) investigation found that increasing the weight percentage of MWCNTs resulted in improved thermal stability. The enhanced electrical conductivity of PMWCNC caused by the addition of MWCNTs was countered through the deposition of a thin film layer of alumina-filled polymer nanocomposite on the top surface of PMWCNC to retain the electrical insulation properties. The representative volume element (RVE) technique was employed to predict the effective modulus of nanocomposite based on the various constituent properties, weight fractions and interfacial behavior between MWCNTs and epoxy with the help of finite element analysis. Additionally, Modified Mori-Tanaka (MMT) micromechanics scheme was used to find the effective elastic modulus of the nanocomposite with the help of the MATLAB code. The elastoplastic behavior of polymer nanocomposites was also simulated in ANSYS APDL through the Voce model. The enhanced thermomechanical properties while retaining the electrical insulation properties suggest that the MWCNTs-based polymer would make the electronic chip more reliable.

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“…Among these, ceramic fillers (Al 2 O 3 , SiO 2 , AlN, Si 3 N 4 , MgO, and BN) have been widely investigated for their potential in thermal conductive and electrical insulation in composites due to their inherent properties. Based on numerous investigations, [23][24][25][26][27][28] boron nitride nanosheet (BNNS) has emerged as the superior choice for thermally conductive but electrically insulating fillers in fabricating polymer composites. This is attributed to the dominance of high TC, low dielectric constant, and high breakdown strength.…”

Section: Introductionmentioning

confidence: 99%

Substantial improvement of thermal conductivity and mechanical properties of polymer composites by incorporation of boron nitride nanosheets and modulation of thermal curing reaction

He,

Zhang,

Liu

et al. 2023

Polymer Composites

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Thermal conductive polymer‐based composites synchronously with stable dielectric and excellent mechanical properties are urgently needed for high‐temperature‐resistant electronic devices. Here, a significant improvement in the thermal conductivity (TC), thermal stability, dielectric, and mechanical performance was simultaneously achieved in the polyarylene ether nitrile (PEN)/divinyl siloxane‐bisbenzocyclobutene (BCB) matrix through the incorporation of boron nitride nanosheets (BNNS) combined together with the post‐solid phase chemical reaction technique. The significant increase in the effective filler‐filler and filler‐crystal contacts in the composites was the main reason for the improvement in TC and dielectric constant. Besides, glass transition temperature (Tg) and mechanicals were enhanced in the presence of cross‐linked networks. By synchronously adding 15 vol% BNNS, the TC of composites after treatment reached up to 5.582 W/m.K, enhanced by 4.4 times higher than untreated. The dielectric constant was down to 2.93 at 1 MHz and the loss remained at a relatively low level. Meanwhile, the composite showed significantly enhanced thermal stability, mechanicals, and hydrophobicity (Tg = 336°C, T5% = 529°C, tensile strength and modulus was 94.5 MPa and 5.3 GPa, respectively, the contact angle was 101.76°). Thus, it promotes an effective strategy for fabricating a high‐performance‐polymer composite, which has the potential used in electronic materials.Highlights Crystallization‐crosslinking strategy optimizes overall performance. Crystals fill gaps between BNNS layers and connect thermal conductive pathway. Crosslinked networks limit molecular chain motion to reduce phonon scattering. The highest TC of the PEN/BCB/BNNS composite is up to 7.451 W/m.K. Thermal property shows significant improvement after crosslinking especially Tg.

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Highly thermal conductivity of PVA-based nanocomposites by constructing MWCNT-BNNS conductive paths

Cited by 20 publications

References 49 publications

Constructing Hierarchical Polymer Nanocomposites with Strongly Enhanced Thermal Conductivity

Constructing Hierarchical Polymer Nanocomposites with Strongly Enhanced Thermal Conductivity

MWCNTs polymer nanocomposite with enhanced thermomechanical properties and electrical insulation for effective encapsulation

Substantial improvement of thermal conductivity and mechanical properties of polymer composites by incorporation of boron nitride nanosheets and modulation of thermal curing reaction

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