纳米纤维无纺布在医药和生命科学、过滤材料等方面有着重要的应用前景。熔喷和静电纺丝是生产纳米纤维无纺布最重要的方法。纳米纤维无纺布制备技术有两个研究方向：熔喷纤维纳米化和静电纺丝的规模生产。熔喷的气流场和静电纺丝的电场都是作用于聚合物射流的外场，纤维形成过程依赖于外部场力的拉伸作用，因此纳米纤维无纺布制备技术的研究有赖于对纺丝拉伸成型力学机理的掌握。本项目关注纳米纤维无纺布制备技术的两个方向，从模拟纤维在不同熔喷气流场和多针头静电纺丝电场中的运动入手，通过设计气流场和电场来控制纤维运动并预测纤维细度，从而研究熔喷气流场特性和多针头静电纺丝电场分布对纤维细度、纤维网形态的影响，以获得纤维更细的纳米纤维无纺布为主要目标，来改良制备纳米纤维无纺布的装置，包括熔喷装置关键部件的设计，以及设计可提高静电纺丝生产率的多喷头静电纺丝装置，建立纳米纤维无纺布生产过程中的自主核心技术。

Nanofibrous nonwovens find a variety of applications in areas of filtration media, life science, medical, and industrial applications. Melt blowing and electrospinning are two major processes for producing nanofibrous nonwovens. Studies aimed at producing meltblown nanofibers and mass production of nanofibers by electrospinning are of great interest for the researchers. During melt blowing and electrospinning,the polymer jets are drawn in the external fields. Therefore, the study on the manufacturing technology of nanofibrous nonwovens relys on the understanding of the mechanical mechanism of the spinning processes. This study focuses on producing meltblown nanofibers and mass production of electrospun fibers. By modeling the fiber motions in melt-blowing airflow fields and electric fields of electrospinning, suitable airflow field and electric field are designed to control the fiber motions, and consequently the effects of airflow field characteristics and the electric field distributions on the fiber diameter and the web morphology are investigated. With the object of producing nanofibrous nonwovens with smaller fiber diameters, the apparatus for manufacturing nanofibrous nonwovens are improved. The improvements include the design of the die structuring of the melt blowing apparatus, and the design of the multi-jet electrospinning apparatus which will enhance productivity. This study will establish the key technology for manufacturing nanofibrous nonwovens.