层间纳米纤维膜对玻纤预制体渗流特性的影响

摘要

In order to investigate the effect of interlaminar nanofibrous membranes on permeability property of glass fiber fabrics,the super depth of field optical microscope was employed to characterize the microstructure of glass fiber fabric with different nanofiber contents.The permeability of glass-fiber preforms incorporated with interlaminar nanofibrous membranes was measured by the radial flow experiments with emphasis on the effect of the nanofiber contents on the impregnating pattern of glass-fiber preforms.The results show that the millimeter-scale regions between glass fiber bundles are filled and discretized into micron-scale regions.Both the porosity and permeability va-lues of preforms decrease with the nanofiber contents increasing.The anisotropy extent of preform was decreased as the increase of nanofiber contents.The area fraction of partially saturated regions behind resin macroscopic front increases with the nanofiber contents increasing.The area fraction of partially saturated region of preforms with the same nanofiber contents increases firstly,and then decreases with injection time increasing.%为了研究层间纳米纤维膜对玻纤织物渗流特性的影响,使用超景深三维显微镜表征了纳米纤维含量对玻纤织物微观结构的影响,采用径向法测量了纳米纤维膜夹层玻纤织物预制体的渗透率,重点分析了纳米纤维含量对玻纤织物预制体渗流模式的影响.结果表明:玻璃纤维束间的毫米尺度区域被纳米纤维膜填充而离散成微米尺度区域;预制体孔隙率及渗透率值均随着纳米纤维含量的增加而减小;随着纳米纤维含量的增加,复合预制体表现出的各向异性程度逐渐减小;树脂宏观流动前沿内部分饱和区域面积比例随纳米纤维含量的增加而增大;相同纳米纤维含量预制体的部分饱和区域面积比例随注入时间的增加呈先增大后减小趋势.