“龟裂”纳米纤维片/玻纤织物复合预制体的层间渗流特性

Permeability Property of “Cracked” Nanofiber Sheets/Glass FiberComposite Preform

中文关键词: “龟裂”纳米纤维片 玻纤预制体 径向流动实验 渗透率 渗流模式

英文关键词: “cracked” nanofiber sheets, glass fiber composite preform, radial flow experiments, permeability, impregnating pattern

中文摘要:

      结合静电纺丝技术和高温煅烧方法制备了“龟裂”TiO₂纳米纤维/玻纤织物复合预制体,使用光学显微镜对TiO₂纳米纤维片的制备工艺进行了优选,采用径向法测量了含有不同厚度TiO₂纳米纤维片复合预制体的渗透率,重点分析了层间“龟裂”纳米纤维片对玻纤织物预制体渗流模式的影响。结果表明,纺丝溶胶液用量为1.0~4.0 mL时可在玻纤织物表面制备出成型良好且附着力强的“龟裂”纳米纤维片；与空白玻纤预制体相比,复合预制体的主渗透率增加了2~3个数量级；复合预制体表现出的各向异性程度随溶胶液用量的增加呈增大的趋势,宏微观流动存在同步性,且随注入时间的延长,同步性更加显著。

英文摘要:

      The “cracked” TiO₂ nanofiber sheets/glass fiber composite preforms were fabricated by electrospinning and high temperature sintering in this paper. The preparation process of TiO₂ nanofiber sheets was optimized by optical microscope. The permeability of composite preforms incorporated with TiO₂ nanofiber sheets with different thickness was measured by the radial flow experiments with emphasis on the effect of the "cracked" nanofiber sheets on the impregnating pattern of glass-fiber preforms. The results show that the nanofiber sheets with good cracking morphology and high adhesion can be fabricated on the surface of glass fiber with the amount of spinning sols of 1.0—4.0 mL. Compared with the blank glass-fiber preforms, the principal permeabilities of composite preforms increase by two or three orders of magnitude. The anisotropy extent of composite preforms increase with the increa-sing of the amount of spinning sols. The Synchronization of macro-and micro-flow exist in the composite preforms, meanwhile, it increase with the filling time.