Micro-morphologies and Generating Mechanisms of Directly Electrospun Products of the SiO_2 Sol

Take tetraethyl orthosilicate(TEOS) as the raw material,the films of the SiO2 gel fiber were prepared by a sol-gel and electro spinning combined technique.How the SiO2 sol viscosity has influence on directly electro spinning performance of SiO2 sol and micro-morphologies of the electro spun products were studied.FESEM observations showed that when the aging time was appropriate(～ 47 h),the SiO2 sol with 200～350 mPa·s in viscosity had a better ability to electro spinning,the films composed of the uniform diameter of 2.5 m and bead-free gel fibers could be obtained.