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东华大学材料科学与工程学院,先进纤维材料全国重点实验室,上海 201620
*滕翠青,E-mail: cqteng@dhu.edu.cn
收稿日期:2025-06-06,
录用日期:2025-07-26,
纸质出版日期:2025
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文欣欣, 张哲, 董杰, 赵昕, 滕翠青. 高强芳纶纳米纤维柔性电磁屏蔽复合薄膜的研究. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2025.25.169
Wen, X. X.; Zhang, Z.; Dong, J.; Zhao, X.; Teng, C. Q. Study on high strength aramid nanofiber flexible electromagnetic shielding composite film. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2025.25.169
文欣欣, 张哲, 董杰, 赵昕, 滕翠青. 高强芳纶纳米纤维柔性电磁屏蔽复合薄膜的研究. 高分子通报, doi: 10.14028/j.cnki.1003-3726.2025.25.169 DOI:
Wen, X. X.; Zhang, Z.; Dong, J.; Zhao, X.; Teng, C. Q. Study on high strength aramid nanofiber flexible electromagnetic shielding composite film. Polym. Bull. (in Chinese), doi: 10.14028/j.cnki.1003-3726.2025.25.169 DOI:
芳纶纳米纤维(ANF)因其优异的机械性能和耐高温特性,常被用作聚合物基体或增强相,与功能性填料复合以制备高性能多功能复合材料。本研究采用真空辅助抽滤,结合热压成型工艺制备出双层结构ANF/碳化钛纳米片(MXene)@银纳米线(AgNW)电磁屏蔽复合薄膜,以二维MXene和一维AgNW构筑三维网络为高效导电层,ANF为聚合物增强层,系统研究双层结构和不同组分协同对复合薄膜力学性能、导电性能、电磁屏蔽(EMI)性能和导热性能的影响规律。研究结果表明:由于MXene、AgNW以及ANF之间存在丰富的氢键相互作用以及强韧的ANF层作为框架支撑结构,保证了整体结构的稳定性,并提高了复合薄膜的力学强度和电磁屏蔽性能。当MXene@AgNW含量为40 wt%时,复合薄膜的拉伸强度和断裂伸长率分别为200.9 MPa和15.5%,电导率和电磁屏蔽效能(EMI SE)分别为751 S/cm和53.1 dB。此外,ANF/MXene@AgNW复合薄膜还展现出优良的柔韧性、耐久性以及导热性能,使得其在智能和柔性可穿戴电子产品设备的电磁屏蔽方面展现出良好前景。
Aramid nanofibers (ANF) are often used as a polymer matrix or reinforcing phase to prepare high-performance multifunctional composites with functional fillers owing to their excellent mechanical properties and high temperature resistance. In this study
a double-layer structure ANF/titanium carbide nanosheets (MXene)@silver nanowires (AgNW) electromagnetic shielding composite film was prepared by vacuum assisted filtration combined with hot pressing process. The three-dimensional network constructed using two-dimensional MXene and one-dimensional AgNW was used as an efficient conductive layer
and the ANF was a polymer enhanced layer. The effects of the double-layer structure and different components on the mechanical properties
electrical conductivity
electromagnetic interference (EMI) shielding performance
and thermal conductivity of the composite film were systematically studied. The results show that owing to the rich hydrogen bond interaction between MXene
AgNW
and ANF and the strong and tough ANF layer as the framework support structure
the stability of the overall structure is ensured
and the mechanical strength and electromagnetic interference shielding effectiveness (EMI SE) of the composite film are improved. When the MXene@AgNW content was 40 wt%
the tensile strength and elongation at break of the composite film were 200.9 MPa and 15.5%
respectively
and the conductivity and electromagnetic shielding effectiveness were 751 S/cm and 53.1 dB
respectively. In addition
the ANF/MXene@AgNW composite film exhibited excellent flexibility
durability
and thermal conductivity
making it a promising candidate for the electromagnetic shielding of smart and flexible wearable electronic devices.
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