Abstract

Lyocell fibers, one of the green and regenerated cellulose fibers, are widely used in the textile fields. However, lyocell fibers are highly flammable which will cause fire accidents. Herein, a novel biomass-based flame retardant derived from vitamin C (VCFR) was designed and synthesized. Then, the lyocell fabrics were finished with VCFR through esterification to fabricate durable flame retardant lyocell fabrics (RF-lyocell). The structure of the different fabrics was characterized by X-ray photoelectron spectroscopy and Fourier transform infrared analysis analysis. The limiting oxygen index value of the FR-lyocell was as high as 39.8%, which still remained 26.4% after 30 washing cycles, indicating excellent flame retardancy and durability. Thermogravimetric-Fourier transform infrared analysis proved that non-combustion compounds, such as CO₂ and water were generated, and provided an obvious flame retardant effect in the gas phase. Cone calorimeter tests showed that the peak of heat release rate and total heat release had a reduction of 89.5% and 54.5%, respectively. These results suggested that VCFR can be used as an effective biomass-based flame retardant for lyocell fabrics.

Graphic abstract

中文翻译：

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通过使用衍生自维生素C的生物质基改性剂制备耐用且阻燃的莱赛尔织物

摘要

莱赛尔纤维是绿色和再生纤维素纤维之一，广泛用于纺织领域。但是，莱赛尔纤维易燃，会引起火灾。本文中，设计并合成了一种新型的基于维生素C的生物质基阻燃剂（VCFR）。然后，通过酯化作用用VCFR对莱赛尔织物进行整理，以制造耐用的阻燃莱赛尔织物（RF-lyocell）。通过X射线光电子能谱和傅立叶变换红外分析法对不同织物的结构进行了表征。FR-lyocell的极限氧指数值高达39.8％，在30个洗涤循环后仍保持26.4％，表明具有出色的阻燃性和耐久性。热重-傅立叶变换红外分析证明不燃烧化合物，如一氧化碳₂和水的产生，在气相中具有明显的阻燃作用。锥形量热仪测试表明，放热速率和总放热峰值分别降低了89.5％和54.5％。这些结果表明，VCFR可以用作莱赛尔织物的一种有效的基于生物质的阻燃剂。

图形摘要