STRUCTURES AND PROPERTIES OF ELECTROSPUN PAN NANOFIBERS COLLECTED FROM TWO DIFFERENT METHODS INCLUDING WATER FLOW AND ROTATIONAL DEVICE

摘要

The electrospun PAN copolymer nanofibers with high degree of alignment and high-drawing were new material to produce continuous high-strength nano-scale carbon fibers. The preparation of ordered nanofibers became an important topic in electrospinn ing. Following techniques are some possible means which have been attempted to align electrospun nanofibers: A thin wheel with sharp edge, an auxiliary electrode/electrical field, parallel plate electrodes, static water bath to receive, a cylinder collector with high rotating speed, conductive template method.magnetic spinning method and so on. These methods can get unidirectional nanofibers arranged in a certain degree, but there were some flaws are more or less. Besides the static water bath collector other methods can't collect fibers for a long time, and the nanofibers can't be used as long fibers. Although the static water bath collector was possible to collect long-fibers, and not subject to time constraints, it collected nanofibers only in a low speed of 0.05m/s, so the nanofibers collected from the static water bath had a low degree in unidirectional arrangement