In situ synthesis of boron nitride “nanonoodles” based epoxy nanocomposites with enhanced thermal and dielectric properties

Abstract

The development of low loading fraction nanoscale reinforcements that can be used to improve the dielectric and thermal properties of a polymer remains a challenge by the reason of the insurmountable difficulties with exfoliation and dispersion of polymer nanocomposites. Here, we combined noodle‐like boron nitride nanoribbons (BNNRs) with epoxy resin (EP) by a facile in situ synthesis. The hydroxyl and amino on the BNNRs surface can not only improve dispersibility but also conduct the formation of EP with BNNRs by the in situ ring‐opening reaction. The thermal behavior, dielectric properties, and thermal conductivity of BNNRs/EP nanocomposites with different BNNRs contents were investigated. At an extremely low BNNRs loading fraction of 1 wt%, the thermal conductivity of the nanocomposite increased 48%, which is attributed to the long continuous heat conduction path formed by the strong integration of BNNRs and EP. In addition, the electrical breakdown strength increased from 95.58 to 159.17 kV·mm−1 as the BNNRs content increased, while the nanocomposites maintained acceptable dielectric properties. The results indicate the potential for BNNRs as a new class of nanofiller for dielectric polymers.

Improved dielectric properties of poly(arylene ether nitrile) with sulfonated poly(arylene ether nitrile) modified CaCu3Ti4O12

“…First, CCTO was fabricated using a wet chemical method and then hydroxylated its surface with piranha solution to produce CCTO-OH. 45 To improve its compatibility with PEN, it was esterified with sulfonated SPEN, offering the SPEN@CCTO hybrid material. Finally, to enhance the dielectric properties, the SPEN@CCTO hybrid material was integrated into the PEN matrix.…”

“…In this study, PEN composite films with superior dielectric and mechanical performance were prepared. First, CCTO was fabricated using a wet chemical method and then hydroxylated its surface with piranha solution to produce CCTO‐OH 45 . To improve its compatibility with PEN, it was esterified with sulfonated SPEN, offering the SPEN@CCTO hybrid material.…”

Improvement of thermo‐mechanical and dielectric properties of poly(lactic acid) and thermoplastic polyurethane blend composites using a graphene and BaTiO3 filler

“…22 Miao et al synthesized nanonoodles of boron nitride and used epoxy as a matrix to fabricate the compostes. 23 They have obained an improved thermal conductivity and maintained the dilectric property of the composites. Moreover, Xue et al have improved energy storage of TPU elastomerts by applying BaTiO 3 as a filler.…”

“…Thus, Zeyu et al incorporated 5 vol.% BaTiO 3 into a poly(vinylidene fluoride‐hexafluoropropylene) (PVDF‐HFP) matrix to obtain a 43% improvement in the dielectric constant, 21 while Taha et al enhanced the dielectric constant of polyvinyl alcohol (PVA) by incorporating 15 wt.% SrTiO 3 via solution mixing 22 . Miao et al synthesized nanonoodles of boron nitride and used epoxy as a matrix to fabricate the compostes 23 . They have obained an improved thermal conductivity and maintained the dilectric property of the composites.…”

ZnO nanowire‐decorated Al2O3/graphene aerogel for improving the thermal conductivity of epoxy composites

“…Therefore, fillers with excellent thermal conductivity are often added into epoxy resin matrix to improve its thermal conductivity. [10] At present, common fillers include metal materials, [11][12][13][14] ceramic materials [15][16][17][18][19] and carbon materials, [20][21][22][23][24] and so forth. Among them, alumina has the advantages of large filling capacity, good stability of particle size, so it is an ideal economic and suitable type of filler.…”