PEO solutions were electrospun under different technological conditions to prepare superfine nanofibers Dispeming morphology of electrospun fibers was characterized by SEM

and crystallization behavior of electmspun fibers was characterized by DSC and XRD Dispersing morphology of electrospun fibers was affected by the solution concentration

the voltage and the distance between two electrodes．In all parameters

the concentration was the key factor Electmspun fibers gradually became fine when the concentration was reduced

and/or the voltage and the distance between two electrodes was increased．The crystallinity of PEO electrospun fibers was lower than that of PEO powders

and the possible mechanism was analysed．