Chen Jiayi, Liu Yansong, Zhang Jiayue, Ren Yuanlin, Liu Xiaohui
School of Textiles Science and Engineering, Tiangong University, Tianjin 300387, China.
Key Laboratory of Advanced Textile Composite, Ministry of Education, Tiangong University, Tianjin 300387, China.
Molecules. 2021 Jun 11;26(12):3588. doi: 10.3390/molecules26123588.
Lyocell fabrics are widely applied in textiles, however, its high flammability increases the risk of fire. Therefore, to resolve the issue, a novel biomass-based flame retardant with phosphorus and nitrogen elements was designed and synthesized by the reaction of arginine with phosphoric acid and urea. It was then grafted onto the lyocell fabric by a dip-dry-cure technique to prepare durable flame-retardant lyocell fabric (FR-lyocell). X-ray photoelectron spectroscopy (XPS) and Fourier-transform infrared spectroscopy (FTIR) analysis demonstrated that the flame retardant was successfully introduced into the lyocell sample. Thermogravimetric (TG) and Raman analyses confirmed that the modified lyocell fabric featured excellent thermal stability and significantly increased char residue. Vertical combustion results indicated that FR-lyocell before and after washing formed a complete and dense char layer. Thermogravimetric Fourier-transform infrared (TG-FTIR) analysis suggested that incombustible substances (such as HO and CO) were produced and played a significant fire retarding role in the gas phase. The cone calorimeter test corroborated that the peak of heat release rate (PHRR) and total heat release (THR) declined by 89.4% and 56.4%, respectively. These results indicated that the flame retardancy of the lyocell fabric was observably ameliorated.
莱赛尔纤维织物在纺织品中广泛应用，然而，其高易燃性增加了火灾风险。因此，为解决该问题，通过精氨酸与磷酸和尿素反应设计并合成了一种新型的含磷和氮元素的生物质基阻燃剂。然后通过浸轧-干燥-焙烘技术将其接枝到莱赛尔纤维织物上，制备出耐久性阻燃莱赛尔纤维织物（FR-莱赛尔）。X射线光电子能谱（XPS）和傅里叶变换红外光谱（FTIR）分析表明阻燃剂成功引入到莱赛尔样品中。热重（TG）和拉曼分析证实改性莱赛尔纤维织物具有优异的热稳定性且残炭显著增加。垂直燃烧结果表明，洗涤前后的FR-莱赛尔形成了完整且致密的炭层。热重傅里叶变换红外（TG-FTIR）分析表明产生了不可燃物质（如HO和CO）并在气相中发挥了显著的阻燃作用。锥形量热仪测试证实热释放速率峰值（PHRR）和总热释放量（THR）分别下降了89.4%和56.4%。这些结果表明莱赛尔纤维织物的阻燃性能得到了显著改善。
