碳纤维/氮化硼填料用于提高聚偏氟乙烯的通面导热性:协同效应与机理

IF 6.5 2区 材料科学 Q1 MATERIALS SCIENCE, COMPOSITES
Guoqing Yi , Jingliang Li , Luke C. Henderson , Weiwei Lei , Boyuan Zhu , Lian Du , Shuaifei Zhao
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引用次数: 0

摘要

通过热压添加不同质量比的氮化硼(BN)和碳纤维(CF),制备了两个系列的导热聚偏二氟乙烯(PVDF)复合材料。研究了双填料对热导率增强的协同效应。对 PVDF 复合材料的形态、热导率、结晶度、热稳定性、机械性能和长期化学稳定性进行了表征。结果表明,BN 和 CF 对提高基于 PVDF 的复合材料的热导率具有显著的协同效应。当在 PVDF 基体中添加 15 wt% 的 BN 和 15 wt% 的 CF 时,热导率达到最大值 1.89 W/(m-K),提高了 1014%。协同效应导致形成了高效的三维导热网络,协同效率高达 113%。利用 Agari 模型说明了热传导机制,揭示了双填料形成传导路径的能力得到了提高。PVDF 复合材料显示出良好的结晶性、热稳定性、机械强度和长期化学稳定性。这项研究强调了 PVDF/BN/CF 复合材料在膜热交换器中的应用潜力,并为高性能导热聚合物复合材料的设计提供了重要启示。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Carbon fiber/boron nitride fillers for enhancing through-plane thermal conductivity of poly(vinylidene fluoride): Synergistic effect and mechanism
Two series of thermally conductive poly(vinylidene fluoride) (PVDF) composites were prepared by adding boron nitride (BN) and carbon fiber (CF) of different mass ratios via hot-pressing. The synergistic effects of the dual fillers on the thermal conductivity enhancement were investigated. The morphology, thermal conductivity, crystallinity, thermal stability, mechanical properties, and long-term chemical stability of the PVDF composites were characterized. The results demonstrated a significant synergistic effect between the BN and the CF on enhancing the thermal conductivity of the PVDF-based composites. The maximum thermal conductivity of 1.89 W/(m·K) with an improvement of 1014 % was achieved when 15 wt% BN and 15 wt% CF were added in the PVDF matrix. The synergistic effect resulted in the formation of efficient three-dimensional thermally conductive networks with a synergistic efficiency up to 113 %. The Agari model was employed to illustrate the thermal conduction mechanism, revealing the improved ability of the dual fillers to form conductive pathways. The PVDF composites showed good crystallinity, thermal stability, mechanical strength, and long-term chemical stability. This study highlights the potential of the PVDF/BN/CF composites for applications in membrane heat exchangers and provides significant insights into the design of high-performance thermally conductive polymer composites.
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来源期刊
Composites Communications
Composites Communications Materials Science-Ceramics and Composites
CiteScore
12.10
自引率
10.00%
发文量
340
审稿时长
36 days
期刊介绍: Composites Communications (Compos. Commun.) is a peer-reviewed journal publishing short communications and letters on the latest advances in composites science and technology. With a rapid review and publication process, its goal is to disseminate new knowledge promptly within the composites community. The journal welcomes manuscripts presenting creative concepts and new findings in design, state-of-the-art approaches in processing, synthesis, characterization, and mechanics modeling. In addition to traditional fiber-/particulate-reinforced engineering composites, it encourages submissions on composites with exceptional physical, mechanical, and fracture properties, as well as those with unique functions and significant application potential. This includes biomimetic and bio-inspired composites for biomedical applications, functional nano-composites for thermal management and energy applications, and composites designed for extreme service environments.
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