Electrospinning of Polymer Nanofibers

本课题拟对静电纺丝聚合物纳米纤维制备纳米纤维的机理进行全面的实验和理论研究。目的是提高基本的理解展宽过程，使其可以控制和用于各种工业应用。将继续对介电和导电射流的稳态运动进行建模，并考虑牛顿和非牛顿粘性聚合物流体。在对单射流稳态解进行稳定性分析的基础上，建立了射流展流的电流体动力学模型。该模型在连续减小的尺度上的多次应用将描述自复制的射流。将尝试用实验来验证超临界状态的存在。由于拉伸是聚合物静电纺丝的独特之处，它提供了一种在短距离内产生聚合物纳米纤维的机制，而不是仅仅拉伸单个射流。用这种方法可以生产大量的纳米纤维。与生物医学材料行业和NIST有合作。

9813098 Dzenis This proposal is to conduct a comprehensive experimental and theoretical study of the electrospinning of polymer nanofibers by a splaying of a charged jet as a mechanism to produce nanofibers. The intent is to improve fundamental understanding of the splaying process so that it can be controlled and used for various industrial applications. Modeling of the steady state motion of the dielectric and conductive jets will be continued, with Newtonian and non-Newtonian viscous polymer fluids considered. An electrohydrodynamic model of splaying will be developed based on stability analysis of the steady-sate solution for a single jet. The self-replicating splaying jet will be described by the multiple application of the model at consecutively decreasing scales. Experimental verification of the existence of a supercritical regime will be attempted. Since splaying is unique for the electrospinning of polymers, it provides a mechanism that produces polymer nanofibers in a short distance, as opposed to a mere stretching of a single jet. High volumes of these nanofibers can be produced in this manner. There is collaboration with the biomedical materials industry and with NIST.