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首页> 外文期刊>ACS applied materials & interfaces >Mussel-Inspired and Magnetic Co-functionalization of Hexagonal Boron Nitride in Poly(vinylidene fluoride) Composites Toward Enhanced Thermal and Mechanical Performance for Heat Exchangers
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Mussel-Inspired and Magnetic Co-functionalization of Hexagonal Boron Nitride in Poly(vinylidene fluoride) Composites Toward Enhanced Thermal and Mechanical Performance for Heat Exchangers

机译：聚（偏二氟乙烯）复合材料中六角形氮化物的爆发和磁共官能化朝向热交换器的增强热和机械性能

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摘要

Thermal-conductive polymer composites have developed to be a hotspot in academic and industrial fields recently. Both efficient heat transport and superior mechanical properties are of critical significance for high-performance thermal-conductive devices. In this paper, magnetic hexagonal boron nitride (mhBN) with excellent interfacial compatibility is successfully synthesized by dopamine and magnetic co-functionalization, and mhBN-poly(vinylidene fluoride) (mhBN-PVDF) composites with a combination of high thermal conductivity and outstanding mechanical property are achieved due to the integration of excellent interfacial interaction and aligned filler architecture into one material's system. The thermal conductivity increases from 0.35 W/(m K) for the 20 wt % pure BN-PVDF to 0.82 W/(m K) after the dopamine modification and further to 1.43 W/(m K) after alignment. The effective medium approximation model demonstrates that the optimization of mhBN orientation and decrease of thermal resistance are two major factors for the enhancement of thermal conductivity. Moreover, the mhBN-PVDF composites also exhibit excellent tensile strength (168.5 MPa at 15 wt % content) and impact strength (20-30 kJ/m(2)). The significantly enhanced thermal and mechanical properties result in the excellent heat exchange ability and durability in the heat exchange test, which is important for potential application in the heat exchange industry.
机译：导热聚合物复合材料最近已开发为学术和工业领域的热点。高效的热传输和优异的机械性能既具有重要意义，对高性能导热装置具有重要意义。本文通过多巴胺和磁共官能化成功地合成了具有优异的界面相容性的磁性六方硼氮化硼（MHBN），以及MHBN-聚（偏二氟乙烯）（MHBN-PVDF）复合材料，具有高导热率和杰出的机械由于将优异的界面相互作用和将填充架构与一个材料的系统一致而实现，因此实现了性质。导热率从多巴胺改性后的20wt％纯BN-PVDF为0.85W /（M k）增加至0.82 w /（m k），并在取向后进一步为1.43w /（m k）。有效介质近似模型表明，MHBN取向的优化和热阻降低是增强导热率的两个主要因素。此外，MHBN-PVDF复合材料还表现出优异的拉伸强度（168.5MPa为15wt％含量）和冲击强度（20-30kJ / m（2））。显着增强的热和机械性能导致热交换试验中的优异的热交换能力和耐久性，这对于热交换行业的潜在应用是重要的。

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