Oxidation-resistant vitamin C/MXene foam via surface hydrogen bonding for stable electromagnetic interference shielding in air ambient

• Published in: Applied surface science 2023-02, Vol.610, p.155396, Article 155396
• Main Authors: Wang, Guohong, Liu, Jianxi, Liu, Xiangcheng, Li, Minghang, Liu, Jiongjie, Chai, Nan, Ye, Fang, Xue, Jimei, Fan, Xiaomeng, Xu, Hailong, Liu, Xingmin, Cheng, Laifei
• Format: Article
• Language: English
• Subjects: Electromagnetic interference; Foam; MXenes; Oxidation resistant
• ISSN: 0169-4332; 1873-5584
• DOI: 10.1016/j.apsusc.2022.155396

[Display omitted] •Oxidation-resistant vitamin C/Ti3C2TX foam composite was developed via surface hydrogen bonding as an EMI shielding material.•The EMI SE of vitamin C/Ti3C2TX foam is more stable than that of Ti3C2TX foam in air ambient.•Vitamin C protects the Ti3C2TX from oxidation by donating electrons. MXenes have been the spotlight of interest as electromagnetic (EM) functional materials. However, the susceptibility (e.g., easy oxidation and fast decomposition) of MXenes leads to the fast fading of EM interference shielding effectiveness (EMI SE), which can be attributed to the easy degredation of MXene by reaction with water and oxygen in air. In this work, a series ofoxidation-resistant vitamin C/Ti3C2TX foam composites were developed as an EMI shielding material. The vitamin C/Ti3C2TX foam composites exhibited improved EM SE stability due to the protection of vitamin C by donating electrons. After exposing to air for 10 days, the EMI SE of vitamin C/Ti3C2TX foam decreased slightly from 42.5 dB to 41 dB while the EMI SE of Ti3C2TX foam dropped significantly from 47 dB to 35 dB. The EMI SE of vitamin C/Ti3C2TX foam and Ti3C2TX foam decreased correspondingly with further increase of exposuring time in air. However, the decreasing rate of vitamin C/Ti3C2TX foam is always slower than that of the Ti3C2TX foam. This work offers an effective way for the designing of oxidation-resistant MXene-based EMI shielding materials.