In recent years, bio-based flame retardants have attracted extensive interest on account of their environmental-friendly character compared with traditional flame retardants. It is reported that oyster shell powder (OSP), composed of 95% calcium carbonate and 5 % organic matter, displays excellent flame retardant potential. In this paper, a novel bio-based flame retardant named functionalized oyster shell powder (FOSP) was prepared by mechanochemistry strategy based on OSP and ammonium polyphosphate (APP) and applied to enhance the fire safety of epoxy resin (EP) composites. The results showed that FOSP emerged with notable effects in improving the fire safety performance for EP composites. Compared with pure EP, the peak value of smoke production rate (pSPR) and peak value of heat release rate (pHRR) reduced by 69.4 % and 78.2 %, respectively. In addition, the char yields of EP composites were higher than EP. Conspicuously, the total CO production for EP composites with the addition of FOSP decreased by 44.9 % compared with EP composites with the addition of APP. Therefore, OSP, a typical marine solid waste, will become a promising candidate for high fire safety polymers.

近年来，与传统阻燃剂相比，生物基阻燃剂因其对环境友好的特性而引起了广泛的关注。据报道，由 95% 的碳酸钙和 5% 的有机物组成的牡蛎壳粉 (OSP) 具有优异的阻燃潜力。本文以OSP和聚磷酸铵（APP）为基础，采用机械化学策略制备了一种新型生物基阻燃剂，名为功能化牡蛎壳粉（FOSP），并应​​用于增强环氧树脂（EP）复合材料的防火安全性。结果表明，FOSP的出现在提高EP复合材料的防火安全性能方面效果显着。与纯EP相比，产烟率峰值（pSPR）和放热率峰值（pHRR）分别降低了69.4%和78.2%。此外，EP 复合材料的炭产率高于 EP。值得注意的是，与添加 APP 的 EP 复合材料相比，添加 FOSP 的 EP 复合材料的 CO 总产量降低了 44.9%。因此，作为一种典型的海洋固体废物，OSP将成为高防火聚合物的有希望的候选者。