Taheri Farid, Chowdhury Shahriar Ahamed, Ghiaskar Ahmad
Advanced Composites and Mechanics Laboratory, Department of Mechanical Engineering, Dalhousie University, Halifax, NS B3H 4R2, Canada.
Polymers (Basel). 2025 May 15;17(10):1348. doi: 10.3390/polym17101348.
The present study focuses on the mechanical performances of basalt fiber-reinforced composites based on the more environmentally friendly Recyclamine resin (BR) and conventional and widely used room-cured epoxy systems (BE). Specifically, the study probes the tensile and compressive responses of the composites fabricated by vacuum-assisted resin transfer molding. Experimental results revealed that the tensile strength of basalt-Recyclamine was higher than its counterpart (464 MPa compared to 390.9 MPa). At the same time, the BR performed only marginally better under compression, with a strength of 237.7 MPa compared to 233.9 MPa for BE. However, the BR demonstrated significantly enhanced ductility reflected by its greater compressive strain capacity (3.9% compared to only 1.1%). Different microscopic analyses unveiled distinct failure mechanisms, with more progressive failure patterns observed in BR compared with the brittle fracture characteristics of the BE composite. The performance of several micromechanical models was also investigated, with their results corroborating with the experimental results with varying degrees of accuracy. The statistical analysis showed great consistency in the results, with the CoV value below 10%. Experimental results indicated that the basalt-Recyclamine composites can be considered a promising sustainable alternative to traditional polymeric resin-based systems due to their balanced mechanical performance and environmental advantages.
本研究聚焦于基于更环保的回收胺树脂（BR）以及传统且广泛使用的室温固化环氧体系（BE）的玄武岩纤维增强复合材料的力学性能。具体而言，该研究探究了通过真空辅助树脂传递模塑法制备的复合材料的拉伸和压缩响应。实验结果表明，玄武岩 - 回收胺复合材料的拉伸强度高于其对应材料（分别为464兆帕和390.9兆帕）。同时，BR在压缩时表现仅略好，其强度为237.7兆帕，而BE为233.9兆帕。然而，BR展现出显著增强的延展性，表现为其具有更大的压缩应变能力（分别为3.9%和仅1.1%）。不同的微观分析揭示了不同的失效机制，与BE复合材料的脆性断裂特征相比，BR观察到更多渐进式的失效模式。还研究了几种微观力学模型的性能，其结果在不同程度上与实验结果相符。统计分析表明结果具有高度一致性，变异系数值低于10%。实验结果表明，玄武岩 - 回收胺复合材料因其平衡的力学性能和环境优势，可被视为传统聚合物树脂基体系的一种有前景的可持续替代材料。
