Device for manufacturing nanofiber membrane continuously

Abstract

The invention relates to a device for manufacturing a nanofiber membrane continuously. The device comprises a direct current high-voltage power supply, a high-position charging barrel with scales, a rotation material storage barrel, a feeding pump, a fiber connecting roller and a material receiving roller. The device is characterized in that a sprayer group with a plurality of sprayers is arranged on a transmission base capable of moving in cycling mode. Liquid level in the rotation storage tank is constant, the central height of all discharging ports on the circumference of the tank is the same, and material pipes led from the discharging ports on the circumference of the tank to the sprayers of the sprayer group are the equal in the length and the diameter. By means of the device, the nanofiber membrane with even components and thickness can be obtained. Due to the fact that the components and thickness of the obtained nanofiber membrane are uniform, molecular orientation of a membrane nanometer structure is even, the obtained membrane is high in mechanical strength and low in hot-shrinkage rate, and bright spots do not exist on a membrane surface. The device is applicable to manufacture of various special nanofiber membranes, especially to a polymer nanofiber membrane for a lithium ion battery diaphragm.

Description

technical field [0001] The invention relates to a device for preparing a thin film on a substrate, more specifically, the invention relates to a device for preparing a nanofiber film with a multi-nozzle constant pressure feeding system. Background technique [0002] Electrospinning, also known as electrospinning, was developed by American Formhals in 1934. Electrospinning refers to the spinning technique of producing polymer fibers by applying an external electric field to a polymer solution (or melt). The diameter of the fiber prepared by electrospinning can reach the nanometer level, which is several orders of magnitude smaller than that of the fiber prepared by the conventional method, and has the advantages of large specific surface area, high porosity, small pore diameter, and large aspect ratio. . At present, it is widely used in the field of special functional materials such as conductive fibers and biomedical polymers; and due to the unique structure and superior c...

AI Technical Summary

Problems solved by technology

The prepared nanofibrous membrane can be directly used as a lithium-ion battery separator, which solves the technical problems of low transverse and longitudinal tensile strength and low puncture strength of the fiber membrane produced by electrospinning, and speeds up the process of nanofibers produced by electrospinning. The pace of fiber membrane entering the lithium battery industry has also greatly improved the quality and reliability of power lithium batteries

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