Zhongyuan University of Technology, Zhengzhou, Henan 451191, China; Collaborative Innovation Center of Advanced Textile Equipment Jointly Constructed by Henan Province and Ministry of Education, Zhengzhou, Henan 451191, China; Zhengzhou Key Laboratory of Flame Retardant, Heat Insulating and Fire Resistant Functional Clothing and Materials, Zhengzhou, Henan 451191, China.
Zhongyuan University of Technology, Zhengzhou, Henan 451191, China.
Int J Biol Macromol. 2024 Oct;278(Pt 2):134873. doi: 10.1016/j.ijbiomac.2024.134873. Epub 2024 Aug 18.
To solve the problems of flammability and smoldering of cotton fabric, its flame-retardant finishing was executed with biomass wool keratin (WK) and cyclic phosphate ester (CPE) through the soaking and baking process. The synergistic mechanism of WK low-temperature melting and CPE catalytic dehydration prompted the formation of protective carbonization layer on cotton fabric surface, and this protective layer reduced its pyrolysis rate, inhibited the production of combustible materials and improved its flame retardancy. The results of synchronous thermal analysis indicate that the initial decomposition temperature of WK and CPE is lower than that of cotton fabric, and they precede the endothermic degradation before fabric main body. This effectively promotes the low-temperature carbonization of cotton fabric and inhibits its pyrolysis. The initial decomposition temperature of WK/CPE treated fabrics advances by 47.9 °C-97.8 °C, presenting significant low-temperature carbonization trend. Moreover, they form 3.0 %-20.0 % aromatic structural char before the pyrolysis of cotton cellulose due to the low-temperature dehydration and carbonization reactions. The damage length after vertical burning is only 4.0 cm for treated fabric with five layers, its after-flame and smoldering disappear, and its limiting oxygen index value increases to 28.7 %. This research provides an effective idea for the flammability and smoldering problems of cotton fabric.
为了解决棉织物易燃和阴燃的问题，采用生物质羊毛角蛋白（WK）和环状磷酸酯（CPE）通过浸渍和烘焙工艺对其进行了阻燃整理。WK 低温熔融和 CPE 催化脱水的协同作用机制促使在棉织物表面形成保护性碳化层，该保护层降低了其热解速率，抑制了可燃材料的产生，提高了其阻燃性。同步热分析的结果表明，WK 和 CPE 的初始分解温度低于棉织物，且在织物主体的吸热降解之前就开始。这有效地促进了棉织物的低温碳化，抑制了其热解。WK/CPE 处理的织物的初始分解温度提高了 47.9°C-97.8°C，呈现出明显的低温碳化趋势。此外，由于低温脱水和碳化反应，它们在棉纤维素热解之前形成了 3.0%-20.0%的芳香结构炭。经过五层处理的织物垂直燃烧后的损毁长度仅为 4.0cm，其续燃和阴燃消失，极限氧指数值增加到 28.7%。该研究为棉织物的易燃和阴燃问题提供了有效的思路。
