This paper is granted with a novel method for improving the toughness of phenolic composite laminates. This method employs electrospun hybrid nanofibers containing polyvinyl butyral (PVB) and pyrolytic carbon (PyC), which are interleaved between mid-layers of the laminate. Mode-II fracture test is used for studying the toughening behavior of modified laminates. The results suggest shortage of pure PVB nanofibers in causing a substantial increase in the fracture toughness of laminates (about 7% increase). However, incorporation of PyC particles to PVB nanofibers can enhance the fracture toughness up to about 24%. Scanning electron microscope images reveal the toughening mechanism provided by each type of nanofibrous mat. Thermal gravimetric analysis was also applied for studying the role of PyC particles in the thermal stability of PVB nanofibers.

本文被认为是一种改善酚醛复合材料层压板韧性的新方法。该方法使用了包含聚乙烯醇缩丁醛（PVB）和热解碳（PyC）的电纺杂化纳米纤维，它们插层在层压板的中间层之间。II型断裂试验用于研究改性层压板的增韧性能。结果表明，纯PVB纳米纤维的缺乏会导致层压板的断裂韧性大幅提高（约增加7％）。但是，将PyC颗粒掺入PVB纳米纤维可以将断裂韧性提高到约24％。扫描电子显微镜图像揭示了每种类型的纳米纤维毡提供的增韧机理。热重量分析法还用于研究PyC颗粒在PVB纳米纤维热稳定性中的作用。