Tang Wufei, Qin Zuodong, Li Xinle, Liu Ting, Cao Xidong, Yang Hua, Cao Zhenmin, Jin Xiaodong, Yuan Peng
Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425199, China.
Hunan Engineering Technology Research Center for Comprehensive Development and Utilization of Biomass Resources, College of Chemistry and Bioengineering, Hunan University of Science and Engineering, Yongzhou 425199, China.
Int J Biol Macromol. 2024 Dec;282(Pt 2):136868. doi: 10.1016/j.ijbiomac.2024.136868. Epub 2024 Oct 23.
Nowadays, there are many types of flame retardants, whether halogenated or halogen-free, that can improve the flame retardancy of wood. However, they continue to pose a significant threat to our environment and cause a substantial increase in the weight gain rates after treatment. It is highly desirable yet challenging to develop an eco-friendly and efficient flame retardant with low weight gain rates. Here, we report a simple and fast process for making eco-friendly flame retardants (chitosan, gelatin, sodium phytate and clay) with weight gain rates of 3.7 %, which form excellent flame retardancy systems. This method can be used to create a 53.5 % reduction in peak heat release rate (pHRR) an 189 % increase in ignition time (cone colorimeter), and a 71.9 % reduction in peak temperature (alcohol spray lamps) compared to raw wood. The results displayed that the effect of flame retardancy (Decreased ratio for pHRR/Weight percent gain) was the best in the past three years. In addition, the flame retardancy mechanism is thoroughly analyzed using the techniques of Raman and so on. This study proposes a novel strategy featured by eco-friendly and simple preparation process for enhancing the flame retardancy of wood in important areas.
如今，有许多类型的阻燃剂，无论是卤化的还是无卤的，都可以提高木材的阻燃性。然而，它们继续对我们的环境构成重大威胁，并导致处理后增重率大幅增加。开发一种具有低增重率的环保高效阻燃剂是非常理想但具有挑战性的。在此，我们报告了一种简单快速的制备环保型阻燃剂（壳聚糖、明胶、植酸钠和粘土）的方法，其增重率为3.7%，形成了优异的阻燃体系。与原始木材相比，该方法可使峰值热释放速率（pHRR）降低53.5%，着火时间（锥形量热仪）增加189%，峰值温度（酒精喷灯）降低71.9%。结果表明，阻燃效果（pHRR/增重百分比降低率）在过去三年中是最好的。此外，使用拉曼等技术对阻燃机理进行了深入分析。本研究提出了一种以环保且制备过程简单为特色的新策略，用于在重要领域提高木材的阻燃性。
