A METHOD FOR JET STABILITY AND FIBER （飞机的稳定性和纤维的方法）.pdfVIP

A METHOD FOR JET STABILITY AND FIBER ALIGNMENT DURING ELECTROSPINNING PROCESSES Brent B. Collins, Jorge L. Jimenez-Rios, Sankha Bhowmick and Alex J. Fowler Department of Mechanical Engineering. University of Massachusetts Dartmouth. North Dartmouth, MA, 02747 Introduction proven techniques [1, 4, 5] to align PEO fibers on a Electrospinning is the formation of micron to submicron rotating surface as shown in figure 1. The concentric polymer fibers from an electrostatically driven jet of lens element consists on 8 copper rings of 4.5 in. polymer solution. It is a relatively simple process diameter with a thickness of 0.25 in. and 0.5 in. between developed decades ago, but in recent years it has rings. Two high-voltage power supplies (Gamma High experienced a growth in interest from the engineering Voltage Research) were used to apply the required community. The applications of electrospun materials in charge of +8KV and +5KV on the needle tip and the nanotechnology include fibers for drug delivery, tissue concentric lens elements respectively. A third power engineering, chemical sensing, membrane-based supply (Glassman High Voltage) was used to provide a filtration, and many others [1]. One strong advantage of charge of -11KV on the collection surface. The PEO these fibers is the large surface area to volume ratio [2]. solution was fed through a glass syringe and 18