Liu Ju, Zhan Huanhui, Song Jianan, Wang Chenfei, Zhao Tong, Fu Bo
Nantong Institute of Technology, College of Safety Engineering and Emergency Management, Nantong 226002, China.
Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China.
Polymers (Basel). 2024 Oct 4;16(19):2814. doi: 10.3390/polym16192814.
In this study, sodium alginate (SA) aerogel cross-linked with Ca was selected as the basic skeleton to construct a lightweight, flame retardant, and thermal insulating composite aerogel via modification with melamine and phytic acid. The resulting aerogel, SA-1.0 MP, achieved a thermal conductivity as low as 0.0379 W/(m·K). Compared to pristine SA aerogel, SA-1.0 MP demonstrated improved fire resistance, evidenced by a substantial increase in the limiting oxygen index (LOI) from 21.5% to 48.8% and a V-0 rating in the UL-94 test. Furthermore, a synergistic mechanism was proposed to explain its remarkable flame-retardant capability.
在本研究中，选择与钙交联的海藻酸钠（SA）气凝胶作为基本骨架，通过用三聚氰胺和植酸进行改性来构建一种轻质、阻燃和隔热的复合气凝胶。所得气凝胶SA-1.0 MP的热导率低至0.0379 W/(m·K)。与原始SA气凝胶相比，SA-1.0 MP的耐火性有所提高，极限氧指数（LOI）从21.5%大幅提高到48.8%，并且在UL-94测试中达到V-0等级，证明了这一点。此外，还提出了一种协同机制来解释其卓越的阻燃能力。
