基于喷气涡流下取向微纳米纤维成纱的演化过程与机理研究

This study will adopt the rotating air vortex with certain pressure and velocity to twist oriented nanofibers into yarns. Two concentric metal rings with the same potential, replacing other orientation receivers( such as rotating drum and framing devices), will be employed to obtain highly oriented nanofibers. Furthermore, this study will adopt the rotating air vortex with certain pressure and velocity to twist oriented nanofibers into yarns. Based on reasonable nanofiber-aligning and yarn-fabricating devices, the following two models,including the relation model about electro-field intensity/electrostatic forces subjected by nanofibers in two concentric metal rings and the two-phase flow model formed by oriented nanofibers/ electrostatic field, will be built. At the same time, the theoretical analysis and numerical calculation about collecting oriented nanofibers will be accomplished. Moreover，mechanics analysis will be proceeded in nanofibers yarns based the rotating air vortex and three dimensional nolinear oscillation equation will also be built. Finally, electric field simulation will be carried out into oriented nanofibers and yarns and Ansoft Maxwell 3D will be used to solve the electric field. The achievement of theoretic research apply into normal electrospinning oriented nanofibers and yarns field, prodict and control the quality of micro or nanofibers by mass production, and compare with experiments, design elecrospun nanofibers machines with independent property. The research achievement will enrich textile connotation.

本研究以一定速度和压力的喷气涡流为基础来对取向微纳米纤维进行可控聚集成纱。高度取向的微纳米纤维将采用相同电位的两个同心金属圆环代替其他类型的取向接收装置（旋转滚筒、框架结构）等。在此基础上，构建电场强度与双圆环间取向纤维受力的关系模型和取向纤维形成的纤维/电场两相流模型，完成取向微纳米纤维收集的理论分析和数值计算。同时，对喷气涡流纺微纳米纤维纱线进行完整的力学分析，建立完善的纱线三维非线性振动方程，从而达到控制整个成纱系统达到稳定性的目的。最后，对取向微纳米纤维与喷气涡流场中的微纳米纤维进行电场模拟，将采用Ansoft Maxwell 3D 软件仿真的方法求解静电纺丝的电场，并做大量实验工作来验证理论的准确性。理论研究的结果应用于普遍的取向纤维及纱线的静电纺丝技术，预测和控制取向微纳米纤维及其纱线的质量，并与实验进行比较，形成设计加工有自主产权的先进设备的能力。研究成果将丰富纺织学科的内涵

本项目以喷气涡流为基础来对取向微纳米纤维进行可控聚集成纱。采用相同电位的两个同心金属圆环作为取向接收装置并研制对喷牵引式连续自取向静电纺纱实验装置，制备了高度取向的微纳米纤维纱线。在此基础上，建立了电场强度与双圆环间取向纤维受力的关系模型和取向纤维形成的纤维/电场两相流模型，并对取向微纳米纤维收集进行理论分析和数值计算。通过实验验证修正模型。完整分析了喷气涡流纺微纳米纤维纱线的力学模型，建立了完善的纱线三维非线性振动方程。对取向微纳米纤维与喷气涡流场中的微纳米纤维进行了电场模拟，并采用数学仿真的方法求解了静电纺丝的电场。对所建立的模型和电场进行实验验证，完善了取向纤维及纱线的静电纺丝技术，并对取向微纳米纤维及其纱线的质量进行预测和控制，设计加工了有自主产权的静电纺成纱设备。