Highly Thermally Conductive and Flame-Retardant Waterborne Polyurethane Composites with 3D BNNS Bridging Structures via Magnetic Field Assistance

IF 26.6 1区材料科学 Q1 Engineering

Nano-Micro Letters Pub Date : 2025-02-07 DOI:10.1007/s40820-025-01651-1

Hao Jiang, Yuhui Xie, Mukun He, Jindao Li, Feng Wu, Hua Guo, Yongqiang Guo, Delong Xie, Yi Mei, Junwei Gu

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引用次数: 0

Abstract

Highlights

By simultaneously incorporating the magnetic filler-modified boron nitride nanosheets (M@BNNS) and the non-magnetic filler U-BNNS into the polymer matrix, a three-dimensional heat conduction pathway composites are obtained under a horizontal magnetic field.
Owing to the microstructural design of the 3D-bridging architecture, with the addition of only 5 wt% U-BNNS, the λ_⊥ of composites achieved 2.88 W m⁻¹ K⁻¹, representing a remarkable increase of 194.2% compared to single-oriented composites.
The 3D-bridging architecture composite also demonstrates excellent flame retardancy, attributed to the synergistic mechanisms of condensed and gas phases, effectively mitigating the risks of thermal runaway in electronic devices.

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高导热阻燃水性聚氨酯复合材料与三维BNNS桥接结构通过磁场辅助

将磁性填料修饰的氮化硼纳米片（M@BNNS）和非磁性填料U-BNNS同时加入到聚合物基体中，在水平磁场下获得了三维热传导通道复合材料。由于3d桥接结构的微结构设计，仅添加5 wt%的U-BNNS，复合材料的λ⊥达到2.88 W m−1 K−1，与单取向复合材料相比显着增加了194.2%。3d桥接结构复合材料也表现出优异的阻燃性，归因于凝聚相和气相的协同机制，有效地降低了电子设备中热失控的风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Nano-Micro Letters NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

32.60

自引率

4.90%

发文量

981

审稿时长

1.1 months

期刊介绍： Nano-Micro Letters is a peer-reviewed, international, interdisciplinary, and open-access journal published under the SpringerOpen brand. Nano-Micro Letters focuses on the science, experiments, engineering, technologies, and applications of nano- or microscale structures and systems in various fields such as physics, chemistry, biology, material science, and pharmacy.It also explores the expanding interfaces between these fields. Nano-Micro Letters particularly emphasizes the bottom-up approach in the length scale from nano to micro. This approach is crucial for achieving industrial applications in nanotechnology, as it involves the assembly, modification, and control of nanostructures on a microscale.