Boron Nitride Nanosheets Modified with Polydopamine and Polyimide Nanofibers as Flexible Thermal Management Materials

Xie, Fan; Dai, Qiyang; Zhuo, Longhai; He, Chaobin; Dai, Xiyi; Liu, Qiaoling; Wei, Haitao; Lu, Zhaoqing

doi:10.1021/acsanm.3c05047

Cited by 4 publications

(1 citation statement)

References 47 publications

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“…Based on this property, the highly oriented arrangement of the filler in the matrix can effectively improve the conductivity of polymer composites. Currently reported methods that enable the orientation of fillers in a polymer matrix include the ice template method, electrostatic spinning, 3D printing, magnetic fields, electric fields, and force fields (vacuum-assisted filtration, two-roll milling, and hot pressing) …”

Section: Introductionmentioning

confidence: 99%

Preparation of Conductive Silicone-Rubber Composites by Dynamic Magnetic Field-Induced Orientation of Ferrosoferric Oxide-Loaded Reduced Graphene Oxide

Xie,

Zhou,

Guo

et al. 2024

ACS Appl. Polym. Mater.

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Conductivity in flexible silicone rubber (SR) is usually achieved by a large number of fillers, which tend to degrade the mechanical properties. Therefore, improving the efficiency of conductive fillers is key to producing high performance conductive SR composites. In this study, approximately 28.58% ferrosoferric oxide was loaded onto graphene (Fe3O4@RGO) to prepare SR composites by inducing Fe3O4@RGO alignment in a room-temperature vulcanized SR matrix using homemade translational and rotational magnetic fields. Raman spectroscopy and scanning electron microscopy showed that the formation of magnetic field-induced Fe3O4@RGO-oriented alignment significantly improves the electrical conductivity of the SR composites. The orientation of Fe3O4@RGO in SR was achieved with a magnetic-field strength of 180 mT in a 2 cm/s translational magnetic field or in a 2 r/s rotating magnetic field. Moreover, the conductivity and electromagnetic shielding efficacy were up to 1.10 ms/mm and 20 dB for orientation with translational magnetic field, and 0.84 ms/mm, 21.6 dB for orientation with rotating magnetic field, respectively. The material’s overall conductivity is improved by the formation of controllable gradient conductive materials under the influence of a translational magnetic field and a rotating magnetic field. Thus, this study provides a feasible method for preparing highly conductive soft polymers.

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Section: Introductionmentioning

confidence: 99%

Preparation of Conductive Silicone-Rubber Composites by Dynamic Magnetic Field-Induced Orientation of Ferrosoferric Oxide-Loaded Reduced Graphene Oxide

Xie,

Zhou,

Guo

et al. 2024

ACS Appl. Polym. Mater.

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Synthesis of Spherical Hexagonal Boron Nitride via Precursor Morphology Control

Nam,

Yun,

Cho

et al. 2024

Adv Eng Mater

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The growing demand for high‐performance semiconductors, driven by the advancement of emerging industries such as artificial intelligence (AI), necessitates the development of novel materials for thermal management. In this respect, hexagonal boron nitride (h‐BN) has emerged as a promising candidate due to its unique properties. However, challenges arise from its two‐dimensional layered structure, resulting in thermal transfer anisotropy and poor fluidity when mixed with polymers for thermal management. To address these challenges, researchers have attempted to fabricate h‐BN into spherical shapes. In this study, a two‐step synthesis method of spherical h‐BN (s‐BN) particles via control of the precursor morphology and a subsequent thermal reaction is proposed. Therefore, as‐fabricated s‐BN exhibits solid spherical shapes with a uniform size distribution, with a median particle size of 0.955 μm. These s‐BN particles, when integrated into epoxy resin, disperse homogeneously, forming efficient heat transfer networks that achieve a 138% improvement in thermal conductivity compared to h‐BN particles with similar diameters, even at lower viscosities. This can overcome the limitations found in the conventional particle shapes while preserving the advantages of h‐BN. Furthermore, it is anticipated that the s‐BN will be applied in thermal management systems, thereby accelerating advancements in electronic technology.

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Growth of polyaniline nanowire arrays on boron nitride microrods enables high‐efficient thermal transport

Han,

Liu,

Zhou

et al. 2024

Polymer Composites

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The rapid development of flexible conductive materials has promoted the research on conductive polymer (CP)‐based materials. However, CPs have relatively low thermal conductivity (TC), which can result in severe heat dissipation problems for device applications. In this work, core–sheath structured polyaniline@boron nitride (BN@PANI) composites were prepared by in‐situ growth strategy, in which PANI nanowire arrays were uniformly anchored to the surface of BN microrods. Thanks to the particular structure, the as‐prepared BN@PANI composite shows excellent thermal management capabilities. Specifically, the TC of the BN@PANI composite is 4.32 W/m·K at low BN loading of 10 wt%, which is almost 17.8 times that of pure PANI. Moreover, the excellent heat dissipation performance is intuitively presented through infrared imaging technology. Impressively, the PANI nanowire arrays are vertically arranged on the BN surface to form a conductive pathway, which results in conductivity comparable to pure PANI. This work broadens the ideas for preparing high‐performance CP‐based composites by using insulating fillers.Highlights Core–sheath structured BN@PANI composites were prepared by an in‐situ growth strategy. The thermal conductivity of composite was 4.32 W/m·K at 10 wt% BN loading. The introduction of BN had little effect on the conductivity of PANI. The BN@PANI composites possessed excellent thermal management capability. This work contributes to understanding heat transport in conductive polymers.

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Boron Nitride Nanosheets Modified with Polydopamine and Polyimide Nanofibers as Flexible Thermal Management Materials

Cited by 4 publications

References 47 publications

Preparation of Conductive Silicone-Rubber Composites by Dynamic Magnetic Field-Induced Orientation of Ferrosoferric Oxide-Loaded Reduced Graphene Oxide

Preparation of Conductive Silicone-Rubber Composites by Dynamic Magnetic Field-Induced Orientation of Ferrosoferric Oxide-Loaded Reduced Graphene Oxide

Synthesis of Spherical Hexagonal Boron Nitride via Precursor Morphology Control

Growth of polyaniline nanowire arrays on boron nitride microrods enables high‐efficient thermal transport

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