Nanofibrous Membranes with High Air Permeability and Fluffy Structure based on Low Temperature Electrospinning Technology

Due to its small diameter and high density, electrospun nanofiber membranes have high resistance which obstacles their application. In this paper, we proposed a new electrospinning method based on low-temperature, which can affect the deposition process of electrospinning by utilizing the freezing process of steam in the receiving plate. The filling and supporting of ice could enlarge the pores of membranes and intervals among fibers, which caused the high porosity (92 %), rough surface, fluffy structure and low pressure drop (123 Pa) of polyvinylidene fluoride (PVDF) nanofibrous membranes. The results suggested that the electrospinning method is a promising way to prepare nanofibrous membranes with high air permeability and fluffy structure for air filtration.