Effect of LiCl mass concentration on stable part of electrospinning PVA polymer solution

During electrospinning process,if the solution is insulating completely or the applied voltage is not high enough,the electrostatic force cannot overcome the surface tension,no fiber can be produced by electrospinning.However,if some salt is added in the solution,the problem can be overcome.The diameter of nanofibers electrospun with PVA solutions with different mass concentrations of LiCl shows the following order: 1% LiCl0.8% LiCl0.5% LiCl0.2 % LiCl.Then the theory was studied between LiCl content and jet radius,derived the relation in the stable stage which satisfies:r~z-1/2.Finally,this relation is experimental verified by measuring the jet radius of PVA solution with different mass concentrations of LiCl added.The result accords well with the theory.