We report the preparation of polymer nanofibers with enhanced flame retardancy by coaxial electrospinning polyamide 66 (PA 66) and nanoscale graphene hybridized with red phosphorus (NG–RP). Transmission electron microscopy and energy-dispersive X-ray spectroscopy revealed that the nanofibers contained a NG–RP-based core surrounded by a PA 66 shell. The flame-retardant characteristics of the nanofibers were investigated by thermal gravimetric analysis, micro combustion calorimetry, and a series of vertical flame tests. The encapsulation of the NG–RP not only enhanced the flame-retardant characteristics of the nanofibers, but also improved their mechanical properties while maintaining the color and luster of the polymer, making the resultant nanofibers appropriate for use in a wide range of applications.

中文翻译：

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具有增强阻燃性的核-壳结构聚酰胺66纳米纤维

我们报告了通过同轴静电纺丝聚酰胺66（PA 66）和与红磷（NG-RP）混合的纳米级石墨烯制备具有增强阻燃性的聚合物纳米纤维的方法。透射电子显微镜和能量色散X射线光谱学表明，纳米纤维包含被PA 66壳包围的基于NG-RP的核。通过热重分析，微燃烧量热法和一系列垂直火焰测试研究了纳米纤维的阻燃特性。NG-RP的封装不仅增强了纳米纤维的阻燃特性，而且改善了它们的机械性能，同时保持了聚合物的颜色和光泽，使所得的纳米纤维适用于广泛的应用。