Flexible Conductive Polyimide Fiber/MXene Composite Film for Electromagnetic Interference Shielding and Joule Heating with Excellent Harsh Environment Tolerance

被引:2
|
作者
Sun, Kang [1 ,2 ]
Wang, Fan [1 ,2 ]
Yang, Wenke [1 ,2 ]
Liu, Hu [1 ,2 ]
Pan, Caofeng [3 ,4 ]
Guo, Zhanhu [5 ]
Liu, Chuntai [1 ,2 ]
Shen, Changyu [1 ,2 ]
机构
[1] Zhengzhou Univ, Key Lab Mat Proc & Mold, Minist Educ, Zhengzhou, Henan, Peoples R China
[2] Zhengzhou Univ, Natl Engn Res Ctr Adv Polymer Proc Technol, Zhengzhou, Henan, Peoples R China
[3] Chinese Acad Sci, Beijing Inst Nanoenergy & Nanosyst, Beijing 100083, Peoples R China
[4] Chinese Acad Sci, Natl Ctr Nanosci & Technol NCNST, Beijing 100083, Peoples R China
[5] Univ Tennessee, Integrated Composites Lab ICL, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA
基金
中国国家自然科学基金;
关键词
polyimide fiber; MXene; lamellar structure; EMI shielding; Joule heating; MECHANICAL-PROPERTIES; CARBON NANOTUBE; NANOCOMPOSITES; ABSORPTION; FABRICATION; LIGHTWEIGHT; MXENES;
D O I
10.1021/acsami.1c15467
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The development of flexible MXene-based multi-functional composites is becoming a hot research area to achieve the application of conductive MXene in wearable electric instruments. Herein, a flexible conductive polyimide fiber (PIF)/MXene composite film with densely stacked "rebar-brick-cement" lamellar structure is fabricated using the simple vacuum filtration plus thermal imidization technique. A water-soluble polyimide precursor, poly(amic acid), is applied to act as a binder and dispersant to ensure the homogeneous dispersion of MXene and its good interfacial adhesion with PIF after thermal imidization, resulting in excellent mechanical robustness and high conductivity (3787.9 S/m). Owing to the reflection on the surface, absorption through conduction loss and interfacial/dipolar polarization loss inside the material, and the lamellar structure that is beneficial for multiple reflection and scattering between adjacent layers, the resultant PIF/MXene composite film exhibits a high electromagnetic interference (EMI) shielding effectiveness of 49.9 dB in the frequency range of 8.2-12.4 GHz. More importantly, its EMI shielding capacity can be well maintained in various harsh environments (e.g., extreme high/low temperature, acid/salt solution, and long-term cyclic bending), showing excellent stability and durability. Furthermore, it also presents fast, stable, and long-term durable Joule heating performances based on its stable and excellent conductivity, demonstrating good thermal deicing effects under actual conditions. Therefore, we believe that the flexible conductive PIF/MXene composite film with excellent conductivity and harsh environment tolerance possesses promising potential for electromagnetic wave protection and personal thermal management.
引用
收藏
页码:50368 / 50380
页数:13
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