含环氧-SiC复合微/纳米纤维的层合板制备及其力学性能

Fabrication and mechanical properties of composite laminates with epoxy-SiC compound ultrafine fiber interfaces

应用同轴静电纺丝技术制备环氧包覆纳米SiC复合微/纳米纤维,将该复合微/纳米纤维收集成无纺布薄膜引入层合板层间界面并固化成型,研究其对层合板力学性能的影响。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)分析了微/纳米纤维的形貌和结构,并测试了微/纳米纤维薄膜的拉伸性能。应用三点弯曲、短梁剪切和简支式冲击实验测定了层合板的弯曲性能、层间剪切强度和冲击韧性。结果表明,一定厚度及一定SiC含量的微/纳米纤维无纺布薄膜对层合板的力学性能无显著影响。

The effects of compound ultrafine fibrous membranes as interlaminar interfaces on the mechanical performances of laminated composites were investigated. The compound ultrafine fibers were prepared by co-axial electrospinning of Epoxy 609 （E-03 609） and SiC solutions. The morphology and microstructure of the compound ultrafine fibers were analyzed with scanning electron microscope （SEM） and transmission electron microscopy （TEM）, and the mechanical behavior of the membranes was studied through tensile testing. The non-woven nano fibrous membranes were incorporated into the interlaminar interfaces in between adjacent plies of the laminates before curing. The mechanical properties of the cured laminate panels were measured through three-point bending, short-beam shearing and lateral impact tests. The results show that the mechanical performances of the composite laminates do not change remarkably when the interfacial nanofibrous membranes have a proper thickness and a suitable content of SiC.