Electrospun non-woven mats of EVOH

Abstract

The poly(ethylene-co-vinyl alcohol) (EVOH) non-woven fabrics are prepared by electrospinning technique. The influence factors - the spinning electric voltage (Vs), capillary-screen distance (C-SD), aqua density (W E ) which affect the fiber diameter and their distribution of the tiny pore in the non-woven fabrics are discussed and the SEM is utilized to characterize the features of the non-woven fabrics. The study results show that the non-woven fabrics could be prepared by electrospinning technique when the Vs is 10∼40KV, C-SD is 20∼30cm, and the diameter of the fiber electrospun on this condition will be around 0.8∼5.0pm under the solvent of isopropyl alcohol/ water and 50∼200nm under the solvent of N,N'-dimethylacetamide; The diameter of the fiber will be affected mainly by W E , V S during the electrospinning, the diameter of the fiber increased with W E and decreased with V S ; the diameter of the pore in the non-woven fabrics will be influenced greatly by the condition of receiver-plate and decrease with V S . Finally the changes of relative surface potential with decay time caused by corona discharge are tested on the electrospun EVOH non-woven fabrics in this article.