抄録
Wet electrospinning here is not the “dry-jet-wet electrospinning”, but an electrospinning that is conducted in an insulator coagulant. The process is shown to be possible by spinning polystyrene-chloroform into the coagulant of fluorinert FC-40 (Sumitomo 3M Ltd.) in our previous paper. The products were, however, not good comparing with those by the ordinary electrospinning. Rhodamine B was added in the spinning solution to improve the spinnability in this paper. Spinning solutions of polystyrene-chloroform containing rhodamine B are prepared. The concentration of polystyrene was 5 to 25wt% and that of rhodamine B was 0 to 1.59mg⁄g. Observations of jet ejection show that distinguished difference occurred due to addition of rhodamine B. Multiple jets were ejected for the spinning solution without addition of rhodamine B. The jets were so thick that the liquid did not accumulate at the tip of the nozzle. On the other hand, Taylor cone was formed and thin jets were ejected from the apex of the cone as a usual electrospinning when rhodamine B was added. Beaded fibers were obtained from 20wt% polystyrene spinning solution, while the fiber beads were eliminated by addition of 0.15mg⁄g rhodamine B. The effects of rhodamine B were attributed to the increasing dielectric constant of the spinning solution.
