摘要
基于聚醚酰亚胺优越的力学性能和纳米纤维膜高比表面积、高孔隙率的特性,利用气泡静电纺丝工艺制备不同厚度的纳米纤维膜改善碳纤维环氧复合材料的层间韧性。结果发现不同膜厚度增韧的双悬臂梁(DCB)试件的I型层间断裂值(GIC)均有所提高,特别是膜厚为0.058±0.007 mm时,层合板的增韧效果最好,比未增韧试件提高了114.55%。通过复合材料层间断裂界面的SEM照片证实了纳米纤维膜在界面处通过桥联约束效应及钉锚作用有效提高了复合材料的层间断裂韧性。
Based on excellent physical property of Polyetherimide（ PEI） and high specific surface area and high porosity of nanofibers,PEI nanofiber membranes with different thickness being bubble-electrospun to be used to improve the interfacial toughness of the carbon fiber / epoxy composites. It is found that when the thickness of membrane is 0. 058 ± 0. 007 mm,the value of GICof DCB sample increases by 114. 55% in contrast to that of the untoughened,which is attributed to the nail-anchorage action of the PEI micro-beads at the interface.
出处
《材料开发与应用》
CAS
2015年第5期57-62,共6页
Development and Application of Materials
基金
第七二五所科技创新项目(LW130302)
关键词
纳米纤维膜
聚醚酰亚胺
层间增韧
碳纤维复合材料
nanofiber membranes
Polyetherimide
interfacial toughen
carbon fiber / epoxy composites
