Simple, effective and safe flame retardants are required to improve flame retardant properties of polymer fibers. However, traditional additive flame retardants, such as halogen-flame retardants and intumescent flame retardants, are likely to cause phase separation of functional phases due to their poor dispersibility and compatibility, or are difficult to be suitable for the high temperature processing conditions of melt-spun fibers. Here, in an effort to develop a practical flame retardant system in which zinc diphosphinate (DEPZn) and D-glucose (DG) were selectively incorporated into polyethylene terephthalate (PET) fiber was developed. As a result, the dense nano-scale zinc phosphate microspheres were formed on the surface and inside the residual carbon during combustion. Thus, PET fibers were endowed with excellent flame retardancy through a thermal barrier and enhancement of physical strength for the carbon layer. Moreover, a synergistic flame-retardant effect was found between DEPZn and DG. DG reduced the size of the zinc phosphate nanosphere from 200 ​nm to 50 ​nm, making the carbon layer denser and smoother. As a result, the peak heat release of the resultant PET composite fiber decreased to 410 ​kW/m² compared 1276 ​kW/m² for neat PET fiber. Moreover, the total smoke release also dropped from 71 ​MJ/kg of neat PET fiber to 64 ​MJ/kg for PET composite fibers. These results provide a promising strategy for the production of industrialized PET flame retardant fibers.

需要简单，有效和安全的阻燃剂来改善聚合物纤维的阻燃性能。但是，传统的添加型阻燃剂，例如卤素阻燃剂和膨胀型阻燃剂，由于其分散性和相容性差，很可能引起功能相的相分离，或者很难适合熔体的高温加工条件。纺成纤维。在这里，为了开发一种实用的阻燃系统，其中二亚膦酸锌（DEPZn）和D将葡萄糖（DG）选择性地掺入聚对苯二甲酸乙二醇酯（PET）纤维中。结果，在燃烧过程中在残留碳的表面和内部形成了致密的纳米级磷酸锌微球。因此，PET纤维通过隔热层赋予了优异的阻燃性，并且增强了碳层的物理强度。此外，在DEPZn和DG之间发现了协同的阻燃作用。DG将磷酸锌纳米球的尺寸从200纳米减小到50纳米，使碳层更致密，更平滑。其结果是，所得到的PET复合纤维的峰值热释放降低至410千瓦/米²相比1276千瓦/米²用于纯净的PET纤维。此外，纯PET纤维的总烟雾释放量也从71 MJ / kg降至PET复合纤维的64 MJ / kg。这些结果为工业化的PET阻燃纤维的生产提供了有希望的策略。