文献类型：期刊文献

英文题名：Ultrathin and flexible polyimide/Ti3C2TX MXene composite films for electromagnetic interference shielding with harsh environment tolerance

作者：Tan, Binzhe[1];Guo, Dongya[1];Tao, Zhirong[1];Chen, Zhibo[1];Lv, Zhijian[1];Wu, Guozhang[1];Lin, Yu[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2023

卷号：12

期号：1

起止页码：276

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY C

收录：;EI(收录号：20235115233859);WOS:【SCI-EXPANDED(收录号:WOS:001122448200001)】；

基金：This work was supported by the National Nature Science Foundation of China (51503066, 51873063), the National Basic Research Program of China (2013CB035505), the Shanghai Sailing Program (14YF1404900), and the China Postdoctoral Science Foundation (2019M660082).

语种：英文

外文关键词：Electromagnetic pulse - Electromagnetic shielding - Electromagnetic wave interference - Fracture mechanics - Lamellar structures - Polyimides - Signal interference - Strain

摘要：Two-dimensional MXene materials show great potential for electromagnetic interference (EMI) shielding application because of their superior electrical conductivity. However, the susceptibility to oxidation and the mechanical brittleness of MXenes greatly limit their extensive application. Herein, an ultrathin flexible polyimide (PI)/Ti3C2TX composite film with a nacre-like lamellar structure is successfully prepared using a simple vacuum filtration and thermal imidization process. Owing to the addition of PI, the composite film exhibits excellent mechanical properties with a tensile strength of 114.9 MPa and a fracture strain of 3.0%. Moreover, the nacre-like lamellar structure is conducive to multiple internal reflections, giving rise to the absorption of electromagnetic waves. The PI/Ti3C2TX composite film exhibits an outstanding EMI shielding effectiveness of 37 dB in the X-band range with an ultrathin thickness of only 15 mu m. Furthermore, PI serves as an antioxidation coating, and its EMI shielding performance is maintained even when the composite film is exposed to various harsh environments. Therefore, the resulting composite film exhibits excellent EMI shielding stability and durability, which enables the potential application of high-performance EMI shielding materials against harsh environments.