Preparation method of hydrophilic nanofiber membrane

Abstract

The invention discloses a preparation method of a hydrophilic nanofiber membrane. A shell-core type permanent hydrophilic nanofiber pure membrane material is prepared in a coaxial electrostatic spinning mode, no base material is needed, a PAN material is dissolved in a mixed solution of an organic solvent and a volatile agent, and a uniform and stable spinning shell solution is formed; a PVDF material is dissolved in the mixed solution of the organic solvent and the volatile agent, a uniform and stable spinning core solution is formed, the spinning distance is set through a special needle device for coaxial electrostatic spinning, the two spinning solutions are not mixed before curing, a shell-core type Taylor cone is formed under the action of an electric field, the solvent is substantially volatilized completely when the shell-core material is collected by a receiving roller, and the shell-core type nanofiber membrane is formed at the receiving roller.

Description

Technical field [0001] The invention relates to a method for preparing a fiber membrane, in particular to a method for preparing a hydrophilic nano fiber membrane. Background technique [0002] Through electrospinning, many literature examples of nanofiber membranes have been reported on the market, such as polystyrene, polycaprolactone, polymethyl methacrylate, polyurethane and inorganic silica fibers. The nanofiber membrane prepared by the electrospinning method can produce nano-scale fibers with a diameter of tens or hundreds of nanometers. The formed fiber mat has good permeability, large specific surface area, high porosity, uniform pore size distribution and dispersion in the nanofiber layer Small, good connectivity of internal pores, very suitable as a filter material. [0003] Since most of the spinnable polymer materials are hydrophobic materials with good physical and chemical properties and thermal stability, the hydrophobic materials have good strength but poor anti-po...

AI Technical Summary

Problems solved by technology

[0006] 1. Hydrophilic modification of organic and inorganic composite method, the disadvantage is that after long-term use of the filter membrane, the inorganic material will be lost and lose hydrophilicity;

[0007] 2. Hydrophilic modification by physical and chemical methods, physical method radiation or other physical methods graft modification effect is not ideal, and chemical method modification is polluting and consumes a lot of energy;

[0008] 3. Material blending method modification, due to the different solvents of polymer materials, many materials are difficult to blend with electrospinning

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