静电纺丝阻燃纳米纤维的研究进展

Research progress of electrospinning flame retardant nanofiber

静电纺丝纳米纤维具有可调控的纤维直径和分布、相互连通的孔结构、高孔隙率、高比表面积、可控纤维堆积密度等优点,成为近年来研究的热点。阻燃性是高分子材料的重要特性,阻燃纤维相较普通纤维具有使用安全性高的特点,研发具有阻燃特性的纳米纤维具有重要意义。静电纺丝技术提供了将纳米颗粒结合到聚合物溶液中并获得具有多种功能复合纤维材料的可能性。基于此,本文综述了采用静电纺丝技术制备阻燃纳米纤维的研究进展,特别是对静电纺丝阻燃纳米纤维的结构进行了分类,主要包括共混结构、核-壳结构、并列结构和多孔结构,并总结了不同结构阻燃纳米纤维的优缺点。然后对静电纺丝阻燃纳米纤维在锂离子电池隔膜、空气过滤、火灾报警传感、防护材料等领域的应用进行了归纳,最后对静电纺丝阻燃纳米纤维未来的发展方向进行了展望。

Electrospinning nanofiber exhibits several advantages,such as adjustable fiber diameter and distribution,interconnected pore structure,high porosity,high specific surface area,and controllable fiber packing density,which is a prominent research hot spot in recent years.Flame-retardant is an important characteristic of polymer materials,and flame-retardant fibers have the characteristic of higher safety in use compared to ordinary fibers.The development of nanofibers with flame-retardant properties is of great significance.Electrospinning technology refers to the jet spinning of polymer solutions or melts under strong electric fields,providing technical support for constructing nanofibers with special functions.It not only provides the possibility of combining functional fillers into polymers,but also provides the possibility of uniform dispersion of functional fillers within the polymer,which helps to more conveniently produce nanocomposites with special properties in situ.Based on this,this review introduced the development of flame-retardant nanofibers via electrospinning technology.Specially,the structure of electrospinning flame-retardant nanofibers was discussed,mainly including blend structure,core-shell structure,side-by-side structure,and porous structure.Their advantages and disadvantages were also emphasized.Moreover,the application status of flame-retardant nanofibers in lithium-ion battery separators,air filtration systems,fire alarm sensors,and protective materials were introduced.Finally,the future development directions of electrospinning flame-retardant nanofibers were foreseen.