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叙述了一种自修补纤维增强聚合物基结构复合材料。在复合材料的基体相中分散着装有修补剂的微胶囊和固体化学催化剂,一旦裂纹穿越微胶囊,修补剂就被释放到裂纹表面,从而引发对复合材料的修补。随后修补剂与化学催化剂接触,发生聚合反应,裂纹表面就被粘接。采用宽锥形双悬臂梁断裂试样对自修补效应进行了验证。首先在试样的中间层产生分层,然后使其愈合。结果表明,室温下的自修补能使试样的层间断裂韧性恢复到原来的45%,80℃下则能恢复到80% 以上。文章还对结构复合材料的自修补动力学与纯环氧基体作了比较研究。
A self-repairing fiber-reinforced polymer-based composite structure is described. In the matrix phase of the composite, microcapsules filled with repairs and solid chemical catalysts are dispersed. As soon as the crack passes through the microcapsules, the repairs are released to the crack surface, causing the repair of the composite. The repair agent is then brought into contact with the chemical catalyst and a polymerization reaction occurs whereby the crack surface is adhered. The self-healing effect was verified with a wide-tapered double-cantilever beam specimen. First, delaminate in the middle layer of the sample and then heal it. The results show that self-repairing at room temperature can restore the interlaminar fracture toughness of the sample to 45% of its original value and recover to over 80% at 80 ℃. The article also made a comparative study of self-healing kinetics and pure epoxy matrix of structural composites.