Method and device for preparation of composite functional membrane with nanofiber layer

Abstract

The invention relates to a method and a device for preparation of a composite functional membrane with a nanofiber layer. The method includes: melting and mixing first polymer in a screw extruder, feeding the mixture into a spinning pump, using a spinneret plate to extrude and cool to form fibers, using high-speed air flow to quicken stretching of the fibers, mechanically or pneumatically controlling filaments to evenly spread on a formation curtain to form nonwoven after fiber division; and dissolving second polymer and functional components into solvent to form spinning solution, spouting the spinning solution from a spray nozzle of an electric spinning device under the action of electrostatic field, and jetting the spinning solution to the nonwoven made of the first polymer under suction of a receiving device with opposite charges, and obtaining the composite functional membrane with the nanofiber layer. The method is implemented via the device for preparation, the nonwoven fabric produced using a spun-bonding process module forms a support layer of the composite membrane, and the nanofibers produced by using an electric spinning module form a functional layer of the composite membrane. The method and the device can be used for simply and efficiently producing double-layer or multi-layer functional membrane materials.

Description

technical field [0001] The invention relates to the technical field of preparation of a composite functional membrane, in particular to a preparation method and a device for a composite functional membrane with a nanofiber layer. Background technique [0002] Electrospinning is a top-down nano-manufacturing technology. The jet is formed by overcoming the liquid surface tension and viscoelastic force of the droplets at the tip of the nozzle by applying an electric field force. Under the action, the atomized liquid jet is bent, stretched, and split by high frequency, and it is drawn tens of millions of times within tens of milliseconds. After solvent volatilization or melt cooling, nano-scale fibers are obtained at the receiving end. This technology has simple process, convenient operation, wide selection of materials, strong controllability, and can prepare nanofibers with microstructure characteristics through nozzle design. It is considered to be the most likely method to r...

AI Technical Summary

Problems solved by technology

However, the primary fiber structure obtained by electrospinning is still unstable, and the supramolecular structure order is low. After stretching and heat setting processing, its physical and mechanical properties still cannot meet the requirements of textile processing, and it is difficult to use alone. Even if it is used as a filter material, It also often needs to be compounded with other materials to strengthen its structure

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