Journal of Materials Science and Engineering with Advanced TechnologyAuthor's: Nakagawa Yuya, Wei Kai, Byoung-Suhk Kim and Ick-Soo Kim
Pages: [97] - [112]
Received Date: July 31, 2010
Submitted by:
We report the effects of various solvents and relative humidity on the
morphologies of the resultant electrospun poly(vinyl pyrrolidone)
(PVP) fibers during electrospinning process. The PVP solution
dissolved in ethanol (EtOH) exhibited the
best electrospun PVP fibers, whereas water and DMF produced the
film-like morphologies under the identical conditions, indicating the
failure of fiber formation, mostly due to slower evaporation of the
solvents, and thereby immediately re-dissolution by the water and
N,N-dimethylformamide (DMF) remained. In addition, the smooth PVP
nanofibers were successfully observed at the relative humidity of
with the fiber diameters ranging from 960nm
to 1000nm. However, at higher relative humidity 
the beaded fibers were formed. As the
relative humidity further increased to 
the resulting PVP fibers were fused and
resulted in film-like morphologies. This was ascribed to
re-dissolution and destruction of the fiber structures formed on the
collector due to higher humidity environment.
nanofibers, electrospinning, poly(vinyl pyrrolidone) fibers, morphologies.
