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Processing nomex nanofibers by Ionic Solution Blow‑Spinning for Efficient High‑Temperature Exhausts Treatment

Advanced Fiber Materials 2023年第2期5卷 497-513页

作者： Zekun Cheng Haiyang Wang Ziwei Li Chong Yang Baopu Zhang Yiqian Zhou Yuxuan Wang Chao Jia Lei Li Hui Wu State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China National Engineering Research Center of Electric Vehicles Beijing Institute of TechnologyBeijing 100081China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

Hard-to-dissolve polymers provide next-generation alternatives for high-performance filter materials owing to their intrin-sically high chemical stability,superior mechanical performance,and excellent high-temperature ***,the mass production of hard-to-dissolve nanofibers still remains a critical challenge.A simple,scalable,and low-cost ionic solu-tion blow-spinning method has herein been provided for the large-scale preparation of hard-to-dissolve nomex polymeric nanofibers with an average diameter of nearly 100 *** rapidly dissolving nomex microfibers in the lithium chloride/dimethylacetamide(LiCl/DMAc)solution system,the conductive solution can be stably and conductivity-independently processed into *** method optimizes electrospinning and avoids spinnability degradation and potential safety hazards caused by high electrical *** to nanofibrous structure and high dipole moment,nomex nanofibrous filters show a stable high filtration efficiency of 99.92%for PM_(0.3) with a low areal density of 4.6 g m^(-2),as well as a low-pressure drop of 189.47 ***,the flame-retardant filter can work at 250°C and 280°C for a long and short time without shrinking or burning,respectively,exhibiting a high filtration efficiency of 99.50%for PM_(0.3-10.0).The outstanding properties and low cost enable the efficient capture of PM from various high-temperature exhausts,making nomex nanofi-brous membrane an even more ideal industrial-grade air filter than polypropylene,polytetrafluoroethylene,polyimide,and ceramic nanofibrous filters.

关键词： nomex nanofibers Solution blow-spinning High-temperature filtration Flame-retardant

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