New observations of jets that produce nanofibers
Longitudinal stresses and critical radial electric fields were observed in electrospinning jets. Viscoelastic stresses in the straight segment of electrically-driven jets of polymer solutions were determined from the propagation of a lateral displacement pulse along the jet. The displacement was applied to the orifice from which the jet issued. A sensitive video camera was used to observe the location and intensity of the light emitted from corona discharges that were created at particular locations around the jet. Since the onset of a corona discharge in air occurred predictably at a critical value of the radial electric field, the corona showed where, along the tapering jet, the electric field reached the critical value. The corona continued, for a short distance along the jet, while the electric field at the surface decreased, and then stopped. When corona was present, many segments of the collected fibers were split longitudinally into two or more smaller, side-by-side nanofibers.
HAN Tao YARIN Alexander L. TRIPATANASUWAN Sureeporn RENEKER Darrell H.
Department of Polymer Science ，The University of Akron, Akron, Ohio, 44325-3909 Department of Mechanical and Industrial Engineering, University of Illinois at Chicago,Chicago, Illi
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
123-126
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）