杂化涂层对玻璃纤维/环氧树脂复合材料高温场下界面性能的影响

Effect of Hybrid Coating on the Interfacial Property of Glass Fiber/Epoxy Composite Processed at High Temperature

以杂化涂层处理后的玻璃纤维(GF)为增强材料,以环氧树脂(EP)为基体,制备出单根GF/EP复合材料。利用扫描电镜(SEM)观察和单纤维复合材料断裂试验,对高温热处理后的复合材料断面形貌和界面剪切强度进行分析。结果表明:杂化涂层的存在降低了GF与EP基体间热线性膨胀系数不匹配性,使GF/EP复合材料的耐热性能得到有效提高,其界面剪切强度较未改性前提高了68.9%。

The glass fibers（GF）coated by hybrid coating as the reinforcing material and the epoxy paint（EP）as the matrix were used to prepare the GF/EP composites.The cross-section morphology and interfacial shear strength（IFSS）of the composites after treatment at high temperature were analyzed by scanning electron microscope（SEM）and the fracture test of single fiber composites.The result indicates the hybrid coating formed on the glass fiber surface alleviates the mismatching of thermal expansion coefficient of GF and EP matrix,which enhances heat-resistant property of GF/EP composites.The IFSS of the composites after treatment at high temperature increases by 68.9%.