Abstract

In this paper, a simple and facile polyol sorbitol was employed to design and synthesize a novel flame retardant containing phosphorus and nitrogen by the reaction of sorbitol with phosphoric acid and urea. The obtained sorbitol-based flame retardant was then used to treat lyocell fibers by a pad-dry-cure procedure. Formaldehyde and other harmful substances were not used during the preparation of flame retardant and modified fibers. For this strategy, only water is used as solvent, and the conditions are mild, safe and environmentally friendly. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy analyses show that the sorbitol-based flame retardant was successfully grafted onto lyocell fibers. Scanning electron microscopy analyses show that the surface morphology of the treated fibers remained unchanged. Thermogravimetric analyses imply that the residue of the treated fibers increases considerably. Vertical combustion and limit oxygen index results indicate that the treated fibers possess excellent flame retardant and durable properties. Based on the results of pyrolysis gas chromatography–mass spectrometry, thermogravimetric-infrared and Raman spectroscopy, the flame retardant operates in condensed phase and gas phase during burning of treated fibers.

中文翻译：

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一种新型，简便，高效的基于山梨糖醇的整理剂，用于耐久阻燃莱赛尔纤维的合成与应用

摘要

本文通过山梨醇与磷酸和尿素的反应，设计了一种简单易行的多元醇山梨醇阻燃剂，设计合成了一种含磷，氮的新型阻燃剂。然后，将所获得的基于山梨醇的阻燃剂通过垫干固化程序用于处理莱赛尔纤维。阻燃剂和改性纤维的制备过程中未使用甲醛和其他有害物质。对于此策略，仅将水用作溶剂，并且条件温和，安全且环境友好。傅里叶变换红外光谱和X射线光电子能谱分析表明，基于山梨醇的阻燃剂已成功接枝到莱赛尔纤维上。扫描电子显微镜分析表明，处理过的纤维的表面形态保持不变。热重分析表明处理过的纤维的残留量大大增加。垂直燃烧和极限氧指数结果表明，处理过的纤维具有出色的阻燃性和耐用性。根据热解气相色谱-质谱，热重红外和拉曼光谱的结果，阻燃剂在燃烧处理过的纤维时在冷凝相和气相中运行。