Abstract In this study, the self-healing ability of the E-glass fibers/epoxy composites based on microvascular channels under flexural and tensile loading was investigated by a three-part healant. The fabrication of the microvascular channels was conducted through embedding the solid preforms and removing them. The epoxy resin and premix anhydride hardener-CuBr2 (2-Methylimidazole) as the healing agents were used to study the self-healing ability of the composites at different healing times (4, 7 and 11 days) and various volume fractions for recovering the tensile (2.5, 4 and 8 vol%) and flexural (2, 3.2 and 3.7 vol%) strength. The optimum recovered tensile strength belonged to the composite containing the 4 vol% healant. The obtained healing efficiencies of this composite after 4, 7 and 11 days were 57, 68 and 69%, respectively. In the flexural test, the composite with the 3.2 vol% healant had the maximum healing efficiencies of 3, 46 and 44%, as compared with other composites. By using the field emission scanning electron microscopy and energy dispersed spectroscopy analysis, the healing ability of the composite was confirmed by this healing system.

中文翻译：

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含有三部分愈合剂的基于微血管通道的自愈合玻璃纤维/环氧树脂复合材料的愈合性能的实验研究

摘要 在这项研究中，基于微血管通道的无碱玻璃纤维/环氧树脂复合材料在弯曲和拉伸载荷下的自修复能力通过三部分修复剂进行了研究。微血管通道的制造是通过嵌入固体预制件并去除它们来进行的。以环氧树脂和预混酸酐硬化剂-CuBr2（2-甲基咪唑）作为愈合剂，研究了复合材料在不同愈合时间（4、7和11天）和不同体积分数下恢复拉伸的自愈合能力。 （2.5、4 和 8 vol%）和弯曲（2、3.2 和 3.7 vol%）强度。最佳恢复拉伸强度属于含有 4 vol% 修复剂的复合材料。该复合材料在 4、7 和 11 天后获得的愈合效率分别为 57、68 和 69%。在弯曲试验中，与其他复合材料相比，含有 3.2 vol% 愈合剂的复合材料的最大愈合效率分别为 3、46 和 44%。通过使用场发射扫描电子显微镜和能量色散光谱分析，该复合材料的愈合能力被该愈合系统证实。