Affiliation:
1. Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical Engineering Northwestern Polytechnical University Xi'an Shaanxi 710072 P. R. China
2. School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore
Abstract
AbstractFlexible multifunctional polymer‐based electromagnetic interference (EMI) shielding composite films have important applications in the fields of 5G communication technology, wearable electronic devices, and artificial intelligence. Based on the design of a porous/multilayered structure and using polyimide (PI) as the matrix and polymethyl methacrylate (PMMA) microspheres as the template, flexible (Fe3O4/PI)–Ti3C2Tx–(Fe3O4/PI) composite films with controllable pore sizes and distribution of Ti3C2Tx hollow microspheres are successfully prepared by sacrificial template method. Owing to the porous/multilayered structure, when the pore size of the Ti3C2Tx hollow microspheres is 10 µm and the mass ratio of PMMA/Ti3C2Tx is 2:1, the (Fe3O4/PI)–Ti3C2Tx–(Fe3O4/PI) composite film has the most excellent EMI shielding performance, with EMI shielding effectiveness (EMI SE) of 85 dB. It is further verified by finite element simulation that the composite film has an excellent shielding effect on electromagnetic waves. In addition, the composite film has good thermal conductivity (thermal conductivity coefficient of 3.49 W (m·K)−1) and mechanical properties (tensile strength of 65.3 MPa). This flexible (Fe3O4/PI)–Ti3C2Tx–(Fe3O4/PI) composite film with excellent EMI shielding performance, thermal conductivity, and mechanical properties has demonstrated great potential for applications in EMI shielding protection for high‐power, portable, and wearable flexible electronic devices.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
273 articles.
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