Preparation method for graphene sponge reinforced nanofiber membrane

Abstract

The invention provides a preparation method for a graphene sponge reinforced nanofiber membrane. The preparation method comprises the following concrete steps: adding a titanium-containing microemulsion into a graphene oxide solution, carrying out uniform mixing under stirring at a high speed so as to obtain a precursor solution, subjecting the precursor solution to rapid freezing and vacuum drying treatment in a low-temperature environment, , then introducing hydrogen for reduction at a high temperature so as to obtain a graphene-based porous sponge; and crushing and grinding the graphene-based porous sponge to a micron size, dispersing the micron-sized graphene-based porous sponge in deionized water, carrying out ultrasonic dispersion so as to obtain an electrophoresis solution, immersing a nanofiber membrane in the electrophoresis solution, inserting positive and negative electrodes into two sides of the nanofiber membrane, carrying out an electrophoresis reaction, and then taking the nanofiber membrane out for drying so as to obtain the graphene sponge reinforced nanofiber membrane. According to the graphene sponge reinforced nanofiber membrane prepared in the invention, the micron-sized graphene sponge is allowed to uniformly infiltrate and adhere to the surface of the nanofiber membrane in virtue of electrophoresis technology, so the functionality of the nanofiber membrane is improved; and the graphene sponge reinforced nanofiber membrane is specially applicable as a composite reinforcement or a carrier.

Description

technical field [0001] The invention belongs to the technical field of textile materials, and in particular relates to a preparation method of a graphene sponge-reinforced nanofiber membrane. Background technique [0002] Electrospinning nanofiber membranes are different from fibers prepared by traditional melt spinning methods. The diameters of fibers prepared by traditional melt spinning methods are in the micron range, while the diameters of fibers prepared by electrospinning are mostly in the nanometer range. By adjusting the spinning process of electrospinning and the properties of the spinning solution, the fiber morphology, pore structure and surface wettability of the nanofiber membrane can be adjusted to obtain channels with higher porosity, smaller pore size, and tortuous structure and uniform pore distribution of the fibrous membrane. In order to endow the performance of electrospun nanofiber membrane, it can be obtained by post-treatment modification method. ...

AI Technical Summary

Problems solved by technology

It can be seen from the above existing technologies that the electrospun nanofiber membranes are functionally modified by the excellent conductivity of graphene or graphene oxide through the impregnation process and LB technology, but the penetration uniformity of the traditional impregnation process is difficult to guarantee. , and LB technology can only functionally modify the surface of the nanofiber membrane, and graphene or graphene oxide mostly adheres to the interior or surface of the nanofiber membrane in the form of flakes, and it is difficult to achieve multi-modal attachment.

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