A breathable and flexible fiber cloth based on cellulose/polyaniline cellular membrane for microwave shielding and absorbing applications

• Published in: Journal of colloid and interface science Vol. 605; pp. 193 - 203
• Main Authors: Zhang, Zhu, Wang, GeHuan, Gu, Weihua, Zhao, Yue, Tang, Shaolong, Ji, Guangbin
• Format: Journal Article
• Language: English
• Published: Elsevier Inc 01.01.2022
• Subjects: absorption; air; alloys; cell membranes; Cellulose; corrosion; electrical conductivity; electromagnetic interference; Electromagnetic interference shielding; Electromagnetic wave absorption; electronics; fabrics; Nanofiber fabric; nanofibers; permeability; Polyaniline; polymerization; Electromagnetic interference shielding; Nanofiber fabric; Electromagnetic wave absorption; Polyaniline; Cellulose
• ISSN: 0021-9797; 1095-7103; 1095-7103
• DOI: 10.1016/j.jcis.2021.07.085

In this work, cellulose/PANI fabrics were synthesized through facile electrospinning and in-situ polymerization process. These materials exhibit excellent EMI shielding and EM wave absorption performance. Besides, it also integrates flexibility, air permeability, and reliable durability, which makes these composites become promising candidates in the field of wearable electronics. [Display omitted] High-performance electromagnetic (EM) wave absorption and shielding materials integrating with flexibility, air permeability, and anti-fatigue characteristics are of great potential in portable and wearable electronics. These materials usually prepared by depositing metal or alloy coatings on fabrics. However, the shortcomings of heavy weight and easy corrosion hamper its application. In this work, the cellulose nanofiber (CF) fabric was prepared by electrospinning technology. Then, conductive polyaniline (PANI) was deposited on the CF surface via a facile in-situ polymerization process. The interweaving cellulose/polyaniline nanofiber (CPF) composite constructs a conductive network, and the electrical conductivity can be adjusted by polymerization time. Benefiting from optimal impedance matching, strong conductive loss, as well as interfacial polarization, the CPF possesses excellent EM absorption performance. The minimum reflection loss (RLmin) value is −49.24 dB, and the effective absorption bandwidth (RL < −10 dB, fe) reaches 6.90 GHz. Furthermore, the CPF also exhibits outstanding electromagnetic interference (EMI) shielding capability with shielding efficiency (SE) of 34.93 dB in the whole X band. Most importantly, the lightweight CPF fabrics have the merits of mechanical flexibility, breathability and wash resistance, which is highly applicable for wearable devices.