With the rapid progress of electronics and 5 G technology, high flame retardancy and low toxicity epoxy resin have been crucial. Hence, the bio-carbon dot (CD) doped with N, P, and Mo elements was prepared by hydrothermal method using corn straw as the biomass carbon source, ethylenediamine as the nitrogen source, and phosphomolybdic acid as the phosphorus and molybdenum source. As a P-containing compound, ADP complexed with CD containing the transition metal element Mo on the surface to obtain complexes (ADP/CD). The flame retardant epoxy resin composites (EP/ADP/CD) were further prepared by ADP/CD as a flame retardant and 4,4′-diaminodiphenylmethane (DDM) as a curing substance. Transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR) were used to analyze the shape and chemical structure of CD. The experimental results indicate that when the additive amount of ADP/CD was 4 % (ADP: CD=3.5:0.5), the limiting oxygen index (LOI) of the EP/3.5ADP/0.5CD was 37.5 % (41.5 % higher than pure EP) and reached the UL94 V-0 rate. Cone calorimeter testing revealed a 51.4 %, 39.1 %, 19.6 %, and 70.4 % decrease in the peak heat release rate (pHRR), total heat release (THR), carbon monoxide production (COP), and carbon dioxide production (CO₂P) of EP/ADP/CD. respectively, then with EP. Furthermore, the mechanical properties of EP/3.5ADP/0.5CD were discussed. Therefore, this work designs a flame-retardant carbon dot, providing a new scheme for creating a multifunctional epoxy resin with flame retardancy, smoke reduction, and toxicity reduction.

随着电子和5G技术的快速进步，高阻燃、低毒的环氧树脂变得至关重要。为此，以玉米秸秆为生物质碳源，乙二胺为氮源，磷钼酸为磷、钼源，采用水热法制备了掺杂N、P、Mo元素的生物碳点（CD）。作为含P化合物，ADP与表面含有过渡金属元素Mo的CD络合，得到络合物(ADP/CD)。以ADP/CD为阻燃剂、4,4′-二氨基二苯甲烷(DDM)为固化物进一步制备了阻燃环氧树脂复合材料(EP/ADP/CD)。使用透射电子显微镜（TEM）和傅里叶变换红外光谱（FTIR）分析CD的形状和化学结构。实验结果表明，当ADP/CD添加量为4%（ADP:CD=3.5:0.5）时，EP/3.5ADP/0.5CD的极限氧指数（LOI）为37.5%（比EP/3.5ADP/0.5CD高41.5%）。纯EP）并达到UL94 V-0等级。锥形量热仪测试显示，峰值放热率 (pHRR)、总放热量 (THR)、一氧化碳生成量 (COP) 和二氧化碳生成量 (CO P) EP/ADP/CD。分别，然后用EP。此外，还讨论了EP/3.5ADP/0.5CD的力学性能。因此，本工作设计了阻燃碳点，为制备具有阻燃、减烟、减毒的多功能环氧树脂提供了新的方案。