Polymerization-induced aramid nanofiber in-situ loaded poly-pyrrole for construction of ultra-strong microwave absorption aerogel

• Published in: Carbon (New York) Vol. 229; p. 119549
• Main Authors: Peng, Guiyu, Zhou, Jintang, Yao, Junru, Lu, Lu, Liu, Jun, Zou, Kexin, Tao, Jiaqi, Liu, Yijie, Yao, Zhengjun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.10.2024
• Subjects: Aerogel; Microwave absorption; Ppy@ANF; Thermal properties; Thermal properties; Ppy@ANF; Microwave absorption; Aerogel
• ISSN: 0008-6223
• DOI: 10.1016/j.carbon.2024.119549

Increasing electromagnetic (EM) radiation and EM pollution have driven extensive attention for high efficiency EM wave absorbing materials, especially aerogel-based composite absorbing materials, which are lightweight, flexible, and heat-insulating. Here, highly efficient absorbing poly-pyrrole@aramid nanofibers (Ppy@ANF) aerogels were assembled using Ppy@ANF nanofibers with core-shell structure. Ppy@ANF nanofibers were constructed for the first time by introducing a Ppy capping layer on the surface of ANF induced by ambient polymerization through a simple redox reaction. Benefit from the macroscopic porous structure of the aerogel and the microscopic core-shell structure design. The Ppy@ANF aerogels achieved an ultra-broadband absorption of 8.27 GHz at 3.43 mm, amd strong absorption characteristic with a reflection loss of −59.63 dB. Meanwhile, it had excellent thermal insulation and mechanical properties. Ppy@ANF aerogels are looked bright to be applied as flexible, lightweight, heat-insulating, and highly efficient absorbing material in wearable electronics, artificial intelligence and other high-tech fields. [Display omitted]