Highly Thermally Conductive Fluorinated Graphene/Aramid Nanofiber Films with Superior Mechanical Properties and Thermostability,Industrial & Engineering Chemistry Research

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Highly Thermally Conductive Fluorinated Graphene/Aramid Nanofiber Films with Superior Mechanical Properties and Thermostability
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2021-06-03 , DOI: 10.1021/acs.iecr.1c01260
Li-Hua Zhao ₁ , Yi-Fei Jin ₁ , Zhi-Guo Wang ₂ , Jun-Wen Ren ₁ , Li-Chuan Jia ₁ , Ding-Xiang Yan _{2,

3} , Zhong-Ming Li ₂

Affiliation

Thermally conductive polymer composites (TCPCs) are in urgent demand for thermal management in modern power electronic systems. However, poor mechanical properties and low heat resistance (<200 °C) restrict their practical applications. Herein, a mechanically strong and highly thermostable fluorinated graphene/aramid nanofiber (f-G/ANF) film was developed by utilizing one-dimensional (1D) ANFs as reinforced blocks and two-dimensional (2D) f-G as a thermally conductive filler for thermal management. The f-G/ANF film exhibited a superior in-plane thermal conductivity of 10.51 W/(m K) due to the formation of a well-arranged layered structure. The in-plane thermal conductivity remained almost unchanged even at 250 °C, demonstrating remarkable thermostability. The f-G/ANF film also possessed excellent tensile strength (>110 MPa) and toughness (>9.9 MJ/m³). It was demonstrated that no obvious change was observed for the in-plane thermal conductivity of the f-G/ANF film even after repeated 1000 folding cycles. These desirable properties make it promising for thermal management in various fields, especially where high mechanical performance and temperature stability are strictly required.

中文翻译：

具有优异机械性能和热稳定性的高导热氟化石墨烯/芳纶纳米纤维薄膜

导热聚合物复合材料 (TCPC) 在现代电力电子系统中迫切需要用于热管理。然而，较差的机械性能和低耐热性（<200°C）限制了它们的实际应用。在此，通过利用一维 (1D) ANF 作为增强块和二维 (2D) fG 作为热管理的导热填料，开发了一种机械强度高且热稳定性高的氟化石墨烯/芳纶纳米纤维 (fG/ANF) 薄膜。由于形成排列良好的层状结构，fG/ANF 膜表现出 10.51 W/(m K) 的优异面内热导率。即使在 250°C 下，面内热导率也几乎保持不变，表现出显着的热稳定性。fG/ANF 薄膜还具有优异的拉伸强度 (>³）。结果表明，即使在重复 1000 次折叠循环后，fG/ANF 薄膜的面内热导率也没有明显变化。这些理想的特性使其有望用于各个领域的热管理，特别是在严格要求高机械性能和温度稳定性的领域。

更新日期：2021-06-17

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