Controllable Strong and Ultralight Aramid Nanofiber‑Based Aerogel Fibers for Thermal Insulation Applications

作     者：Mengmeng Li Xian Chen Xiuting Li Jie Dong Xin Zhao Qinghua Zhang 

作者机构：State Key Laboratory for Modification of Chemical Fibers and Polymer MaterialsCollege of Materials Science and EngineeringDonghua UniversityShanghai 201620People’s Republic of China 

出 版 物：《Advanced Fiber Materials》 (先进纤维材料（英文）)

年 卷 期：2022年第4卷第5期

页      面：1267-1277页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(NSFC)(21975040) the Scientific Research Innovation Plan of Shanghai Education Commission(2019-01-07-00-03-E00001) the Fundamental Research Funds for the Central Universities and the Graduate Student Innovation Fund of Donghua University(CUSF-DH-D-2021007) 

主　　题：ANFs High mechanical properties Aerogel fiber Thermal insulation 

摘      要：High-performance polymer-based aerogel fibers with ultrahigh porosity,mechanical robustness and outstanding thermal stability are demanded for applying in effective thermal insulation devices,especially in harsh ***,the poor mechanical properties and thermal stability of the commonly reported polymer-based aerogel fibers restricted their applications in many *** a special nano-build-block,aramid nanofiber-based aerogel fiber is expected to conquer this problem in virtue of the outstanding performance,intrinsically related to aramid ***,a series of aramid nanofiber-based aerogel fibers were fabricated via a facial wet-spinning method combined with freeze-drying *** effects of coagulation bath temperature and the solid contents of the spinning precursors on their morphologies and mechanical properties were systematically *** obtained aerogel fibers possessed high porosity(92%),good mechanical prop-erties(tensile strength~8.1 MPa)and high specific surface area(~239 m^(2)/g).Meanwhile,the woven textiles exhibited a low thermal conductivity(~34 mW/(m·K))and outstanding thermal insulation properties under a wide range of *** addition,surface modification by Teflon resin could make the ANAFs hydrophobic,thus exhibiting their applicational pros-pects in a humid ***,the aramid nanofiber-based aerogel fibers and their textile throw light in a favorable direction for developing high-performance thermal insulation fibers and textiles.