Key Laboratory of Flame Retardancy Finishing of Textile Materials (CNTAC), National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China.
Key Laboratory of Flame Retardancy Finishing of Textile Materials (CNTAC), National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Renai Road, Suzhou 215123, China.
Int J Biol Macromol. 2024 Nov;279(Pt 4):135516. doi: 10.1016/j.ijbiomac.2024.135516. Epub 2024 Sep 10.
The facile development of a sustainable and durable flame-retardant approach for protein silk is of interest. Inspired by silk tin-weighting technology, this study developed a novel and sustainable in-situ deposition strategy based on biomass phytic acid to impart durable flame-retardant performance to silk fabrics. The chemical structure of insoluble chelating precipitation, and the surface morphology, thermal stability, combustion behavior, flame-retardant capacity, laundering resistance, and flame-retardant mode of action of the tin-weighting silk samples, were explored. The Sn-, P-, Si-containing insoluble chelating precipitation formed within the fiber interior and combined with silk fibers through electrostatic attraction and metal salt chelation. As a result, the tin-weighting silk displayed excellent self-extinguishing capacity, with the damaged length reduced to 9.2 cm and the LOI increased to 31.6 %; it also achieved self-extinguishing after 30 washing cycles, demonstrating high flame-retardant efficacy and laundering resistance. Moreover, the tin-weighting silk also showed the obvious suppression in smoke and heat generation by 55.6 % and 35.7 %, respectively. The synergistic charring action of phosphate groups, tin metal salts, and silicates was beneficial for enhancing the fire safety of silk. The tin-weighting treatment also displayed a minor impact on mechanical performance of silk fabrics.
为蛋白质丝开发一种简便、可持续且耐用的阻燃方法是很有意义的。受丝增重技术的启发，本研究开发了一种基于生物质植酸的新型可持续原位沉积策略，赋予丝绸织物持久的阻燃性能。探讨了不溶性螯合沉淀的化学结构以及增重丝样品的表面形态、热稳定性、燃烧行为、阻燃性能、耐洗性和阻燃作用模式。锡增重丝内部形成了含有 Sn、P、Si 的不溶性螯合沉淀，并通过静电吸引和金属盐螯合与丝纤维结合。结果表明，锡增重丝具有出色的自熄能力，损毁长度降至 9.2cm，LOI 提高至 31.6%；经过 30 次洗涤循环后仍能自熄，表现出优异的阻燃效果和耐洗性。此外，锡增重丝还分别显著抑制了 55.6%和 35.7%的烟雾和热量产生。磷基团、锡金属盐和硅酸盐的协同碳化作用有利于提高丝绸的消防安全。增重处理对丝绸织物的机械性能也几乎没有影响。
