Effect of the main electrospinning parameters on fiber diameter and morphology.

	Polymer solution properties				Process parameters			Environmental parameters
	Relative molecular mass ↑	Concentration and viscosity ↑	Surface tension ↑	Conductivity ↑	Voltage ↑	Flow rate ↑	Receiving distance ↑	Temperature ↑	Humidity ↑
Fiber diameter	↑	↑	↑	↓	↓ Then ↑	↑	↓	↓
Fiber morphology	Less beads, uniform fibers	High viscosity, no continuous fiber	Increased probability of generating beaded structures	Wide fiber diameter distribution	The fiber diameter distribution is widened, which is not conducive to obtaining a fiber with a smooth surface, and a bead structure is generated at a high voltage	Excessive flow rate resulting in beaded fibers		More uniform fiber diameter distribution	Forming a multiporous structure on the surface of the fiber