Ultrathin, flexible, and high-strength polypyrrole/Ti3C2Tx film for wide-band gigahertz and terahertz electromagnetic interference shielding. Issue 44 (31st October 2022)

• Record Type: Journal Article
• Authors: Yang, Shaodian; Yang, Rongliang; Lin, Zhiqiang; Wang, Ximiao; Liu, Shaojing; Huang, Weibo; Chen, Zibo; Wei, Jianhong; Zeng, Zhiping; Chen, Huanjun; Hu, Yougen; Gui, Xuchun
• Is Part Of: Journal of materials chemistry. Volume 10:Issue 44(2022)
• Page Start: 23570
• Page End: 23579
• Publication Date: 2022-10-31
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d2ta06805b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : An ultrathin, flexible, and high-strength Ti3 C2 T x MXene film enhanced by "pyrrole bridge" is constructed. The obtained film demonstrates excellent EMI SE of 64.5 dB in the gigahertz range and 71.4 dB in the terahertz band at 4 μm. Abstract : High-frequency radio technology, especially fast-growing terahertz technology, brings great convenience to human life but also raises concern about electromagnetic interference. However, it still lacks a high-performance shielding material containing the features of a high shielding bandwidth (in both GHz and THz bands), high shielding effectiveness (SE), high mechanical strength, and small thickness. Here, an ultrathin and flexible polypyrrole/Ti3 C2 T x (PPy/Ti3 C2 T x ) film with high electromagnetic interference (EMI) shielding performance and high mechanical property was constructed by a vacuum filtration and hot-press process. The inserted PPy chains tightly connected each Ti3 C2 T x nanosheet, acting as both the out-of-plane electron–transport pathways and elastic hinges between the nanosheets. With only 9 wt% of PPy, an as-fabricated PPy/Ti3 C2 T x film showed the highest conductivity of ∼780 000 S m −1 and highest tensile strength of ∼200 MPa. The enhanced conductivity and compressed multilayer structure brought remarkable GHz and THz EMI shielding performance. A highest average EMI SE value of 64.5 dB in the GHz range (8.2–40.0 GHz) and a highest value of 71.4 dB in the THz range (0.2–1.6 THz) were delivered by the PPy/Ti3 C2 T x sample with an ultrasmall thickness of 4 μm. The outstanding comprehensive performances of the PPy/Ti3 C2 T x film demonstrate its great potential in EMI shielding for next-generation smart and wearable electronics.