MULTI-DIMENSIONAL HYDROPHILIC-HYDROPHOBIC COMPOSITE NANOFIBER MEMBRANE AND PREPARATION METHOD THEREOF

摘要

A multi-dimensional hydrophilic-hydrophobic composite nanofiber membrane and a preparation method thereof. The multi-dimensional hydrophilic-hydrophobic composite nanofiber membrane comprises a first hydrophobic layer (1), a first hydrophilic layer (2), a second hydrophilic layer (3), and a second hydrophobic layer (4) sequentially provided from top to bottom. A water contact angle of the first hydrophobic layer (1) and a water contact angle of the second hydrophobic layer (4) are greater than 90 degrees. A water contact angle of the first hydrophilic layer (2) and a water contact angle of the second hydrophilic layer (3) are less than 70 degrees. The second hydrophobic layer (4) is a nanofiber-based membrane. The above composite nanofiber membrane having a multi-dimensional hydrophilic-hydrophobic gradient structure is prepared by means of plasma technology and electrospinning technology. The membrane material achieves directional adsorption and fixation of particulate matter, and has a good filtration effect.