Bio-Inspired Aramid Fibers@silica Binary Synergistic Aerogels with High Thermal Insulation and Fire-Retardant Performance.

Content Provider	Europe PMC
Author	Zhou, Jinman Liu, Xianyuan He, Xiaojiang Wang, Haoxin Ma, Dongli Lu, Xianyong
Editor	Antunes, Marcelo
Copyright Year	2022
Abstract	Flame-retardant, thermal insulation, mechanically robust, and comprehensive protection against extreme environmental threats aerogels are highly desirable for protective equipment. Herein, inspired by the core (organic)-shell (inorganic) structure of lobster antenna, fire-retardant and mechanically robust aramid fibers@silica nanocomposite aerogels with core-shell structures are fabricated via the sol-gel-film transformation and chemical vapor deposition process. The thickness of silica coating can be well-defined and controlled by the CVD time. Aramid fibers@silica nanocomposite aerogels show high heat resistance (530 °C), low thermal conductivity of 0.030 W·m−1·K−1, high tensile strength of 7.5 MPa and good flexibility. More importantly, aramid fibers@silica aerogels have high flame retardancy with limiting oxygen index 36.5. In addition, this material fabricated by the simple preparation process is believed to have potential application value in the field of aerospace or high-temperature thermal protection.
Journal	Polymers
Volume Number	15
PubMed Central reference number	PMC9824314
Issue Number	1
PubMed reference number	36616490
e-ISSN	20734360
DOI	10.3390/polym15010141
Language	English
Publisher	MDPI
Publisher Date	2022-12-28
Access Restriction	Open
Rights License	Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). © 2022 by the authors.
Subject Keyword	aramid nanofibers bionic structure silica heat resistance flame retardancy
Content Type	Text
Resource Type	Article
Subject	Chemistry Polymers and Plastics