Abstract
Ultrafine fibrous membranes of poly(vinyl alcohol)(PVA) were prepared by electrospinning from aqueous solutions of fully hydrolyzed PVA.The morphology of the electrospun PVA fibers was observed under a scanning electron microscope.The crystallization behavior was investigated by X-ray diffraction (XRD).Mechanical properties and water up-take of the fibrous PVA membrane were also evaluated.Results suggested that the average diameter of ultrafine PVA fibers was (184±26) nm.XRD analysis exhibited poor development of crystallinity in electrospun fibrous PVA membranes.The tensile strength,tensile modulus and elongation at break of the fibrous PVA membrane were (5.10±0.77) MPa,(236±27) MPa and (8.28±2.38)% respectively,indicating weak mechanical properties compared with the casting PVA film.Water up-take of fibrous PVA membranes was more than 300%,higher than that of the casting PVA film.Crosslinking of the fibrous PVA membrane did not show significant influence on its water up-take.
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