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말산과 젖산을 부가하여 전기방사한 Poly(vinyl alcohol) 부직포
정윤호,조민석,이운수,길명섭,박병기,김학용,Jung, Yoon-Ho,Cho, Min-Seok,Lee, Un-Soo,Khil, Myung-Seob,Pak, Pyong-Ki,Kim, Hak-Yong 한국섬유공학회 2007 한국섬유공학회지 Vol.44 No.2
Poly(vinyl alcohol) (PVA) solutions were prepared by dissolving PVA in malic acid (MA)/distilled water, lactic acid (LA)/distilled water, and distilled water (DW) as a comparison solvent Viscosity and electric conductivity of PVA solution were determined by using a digital viscometer and electric conductivity' meter at room temperature, respectively. The morphological characteristics of the electrospun PVA nonwoven mats were investigated with a scanning electron microscopy (SEM) after gold sputtering. Also, mechanical properties of electrospun PVA nonwoven mats were measured by a universal testing machine (UTM). SEM results indicated that the electrospun fibers prepared from 4 wt% MA/DW as a solvent showed highly entangled structure due to their bent shape, which resulted in high mechanical strength of electrospun PVA nonwoven mats. Tensile strength and breaking elongation of electrospun PVA fibers prepared from 4 wt% MA/DW were over 12 MPa and 420%, respectively.