Abstract

The current study investigates the reinforcement properties of novel nano-calcium carbonate (nano-CaCO₃) synthesized from Achatina fulica snail shell. The shell was wet-milled to nanoparticle sizes using mechanochemical procedures. Epoxy nanocomposites prepared with nanofiller content ranges of 1–7 wt.% were fabricated using a conventional resin casting method. Thermal stability and degradation with mechanical properties such as tensile strength, impact strength, and the hardness properties of prepared nanocomposites were determined. It was observed that the reinforcement by the synthesized nano-CaCO₃ improved the thermal stability and mechanical properties of neat epoxy irrespective of the filler content. Significantly, the inclusion of 1 w.% Achatina fulica snail shell nanoparticles increased the neat epoxy tensile strength by 75%, stiffness by over 25%, impact strength by 25%, and hardness 35%. These improved properties indicate that nano-CaCO₃ synthesized from A. fulica snail shell possesses suitable reinforcement properties that can be used for nanocomposite fabrication.

摘要

目前的研究调查新颖的纳米碳酸钙（纳米碳酸钙的补强性能₃从合成）非洲大蜗牛蜗牛壳。使用机械化学程序将壳湿磨成纳米颗粒大小。使用传统的树脂浇注方法制备纳米填料含量范围为 1-7 重量％的环氧树脂纳米复合材料。测定了制备的纳米复合材料的热稳定性和降解性以及机械性能，如拉伸强度、冲击强度和硬度。观察到合成纳米CaCO ₃的增强提高了纯环氧树脂的热稳定性和机械性能，而与填料含量无关。值得注意的是，包含 1 w.%Achatina fulica蜗牛壳纳米粒子将纯环氧树脂拉伸强度提高了 75%，刚度提高了 25% 以上，冲击强度提高了 25%，硬度提高了 35%。这些改进的特性表明，从A. fulica蜗牛壳合成的纳米 CaCO ₃具有合适的增强特性，可用于纳米复合材料的制备。