Table 1.

Summary of the typical morphologies of the droplets and fibers

THF/DMF ratio	Droplet	Coarse fiber	Finer fiber	Fibers
5:1	Porous	Grooved	Grooved	Single grooved
2:1	Smooth	Single grooved	Single grooved	Single grooved
1:1	Smooth	Wrinkled	Grooved	Grooved
1:2	Smooth	Smooth	Smooth	Smooth
1:5	Porous	Smooth	Smooth	Smooth