A high-performance, oxidation resistance and flexible Zn@MXene/cellulose nanofibers electromagnetic shielding film. Issue 10 (27th February 2023)

• Record Type: Journal Article
• Authors: Da, Yunsheng; Qu, Qiqi; Kong, Ling; Liu, Qiang; Zhu, Menghan; Du, Yiming; Tian, Xingyou; Liu, Yanyan; Wang, Hua
• Is Part Of: RSC advances. Volume 13:Issue 10(2023)
• Page Start: 6619
• Page End: 6629
• Publication Date: 2023-02-27
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2ra07791d
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : This work focuses on studying the excellent oxidation resistance performance and flexibility of electromagnetic shielding materials, greatly promoting the practical application in marine engineering, wearable field and electronic packaging field. Abstract : Next-generation wearable electromagnetic interference (EMI) materials need to be provided with oxidation resistance, lightness, and flexibility. In this study, a high-performance EMI film with synergistic enhancement of Zn 2+ @Ti3 C2 T x MXene/cellulose nanofibers (CNF) was found. The unique Zn@Ti3 C2 T x MXene/CNF heterogeneous interface facilitates the loss of interface polarization, making the total electromagnetic shielding effectiveness (EMI SET ) and shielding effectiveness per unit thickness (SE/ d ) of the films reach 60.3 dB and 5025 dB mm −1, respectively, in the X-band at the thickness of 12 μm ± 2 μm, significantly exceeding that of other MXene-based shielding materials. In addition, the coefficient of absorption gradually increases with the increasing CNF content. Moreover, under the synergistic effect of Zn 2+, the film shows excellent oxidation resistance (maintaining stable performance after 30 days), greatly exceeding the previous test cycle. Furthermore, the mechanical performance and flexibility of the film are greatly enhanced (tensile strength at 60 MPa, and maintaining stable performance after 100 times bending tests) due to the CNF and hot-pressing process. Therefore, with the enhancement of the EMI performance, high flexibility and oxidation resistance under high temperature and high humidity conditions, the as-prepared films have wide practical significance and broad application prospects in a series of complex applications, such as flexible wearable fields, ocean engineering fields and high-power device packaging fields.