Abstract
Post-process thermal treatment of electrospun fibers obtained from poly(ethylene oxide) (PEO) water and methanol solutions was examined. PEO fibers from methanol solution showed larger diameters as observed by scanning electron microscopy. Fibers both from water and methanol solutions exhibited a significant dimensional stability and surface cracking during the specific exposure time after thermal treatments at 40, 50, and 60 °C. Changes in crystallinity after the thermal treatment were studied by wide-angle X-ray diffraction. The kinetics of secondary crystallization were positively influenced by the as-processed level of the amorphous phase and temperature of thermal treatment. Samples treated at 60 °C were degraded by thermooxidation within the time.
Highlights
Poly(ethylene oxide) (PEO) is a nontoxic highly crystalline polymer with a glass transition temperature of approximately −50 ◦ C, promising extensive chain flexibility [1]
The experimental results of this study have shown the following conclusions for poly(ethylene oxide) (PEO)
Electrospun fibers: 1. Electrospun PEO fibers processed from methanol solution possess higher diameters compared with fibers obtained from water
Summary
Poly(ethylene oxide) (PEO) is a nontoxic highly crystalline polymer with a glass transition temperature of approximately −50 ◦ C, promising extensive chain flexibility [1]. It can be dissolved in various organic solvents, such as methanol or ethanol, and water, which classifies it as an spinnable material. PEO often serves as a carrier liquid facilitating the electrospinning process of some polymers, such as chitosan or cellulose [9]. These nanofibrous membranes perform many beneficial properties, including a high pore density and surface area. Bao et al [14] studied the morphology of PEO nanofibrous membranes
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