Transparent nanofiber membrane, preparation thereof and application of transparent nanofiber membrane to transparent mask

Abstract

The invention relates to a transparent nanofiber membrane, preparation thereof and application of the transparent nanofiber membrane to a transparent mask. The preparation method comprises: a high-molecular polymer is prepared into the transparent nanofiber membrane by adopting an electrostatic spinning process and a special receiving base material; a special receiving base material is an insulating base material which is integrally of a planar net-shaped structure, a basic unit I forming the planar net-shaped structure is of a planar structure formed by connecting a regular hexagon support and three linear supports, one ends of the three linear supports converge at the center of the regular hexagon support, and the other ends of the linear supports are respectively connected with three nonadjacent vertexes of the regular hexagonal bracket; the special receiving base material is coated on the circumferential surface of a grounded roller; the average thickness of the finally prepared transparent nanofiber membrane is 1-20 [mu] m, and the average thickness of the main body part is 0.2-4 [mu] m; and fibers of the main body part are arranged in a certain orientation, and the orientation degree is greater than 80%. The transparent nanofiber membrane is used for manufacturing a transparent mask. The method is simple, and the prepared fiber membrane is high in transparency and porosity.

Description

technical field [0001] The invention belongs to the technical field of masks, and relates to a transparent nanofiber film and its preparation and application on transparent masks. Background technique [0002] Flexible, transparent films or fibrous films or substrates have attracted extensive attention in the fields of smart wear, electronic skin, air filtration, biomedicine, and personal protection. Traditional transparent films or substrates, such as glass and polyester (PET), polyethylene (PE) plastics, etc., cannot fully meet the needs of emerging applications that require excellent adsorption, gas permeability (large specific surface area , high porosity) and flexible transparent material. For example, smart wearables or electronic skins are becoming more and more popular, and the existing transparent film materials cannot simultaneously exhibit high light transmittance and good air permeability; air pollution causes serious harm to human health, and the existing filte...

AI Technical Summary

Problems solved by technology

However, the transparency of electrospun fibrous membranes is extremely difficult due to the severe light reflection and scattering of microfibers and nanofibers.

There have been many reports on the preparation of electrospun transparent fiber membranes, which can be divided into two categories: one is to fill the polymer into the fiber membrane, which can generate transparent nanocomposites; for example, the two-component phenolic epoxy Resin is added to electrospun nylon-4,6 film; nylon-6 nanofiber film is filled with cellulose acetate; polyacrylonitrile (PAN) / polyurethane (PU) composite nanofiber film is heated to melt PU to obtain transparency; this realizes transparent fiber The membrane method loses the fiber structure and pores, and the micro or nanofibers only play a reinforcing role; the other type is to reduce the thickness of the electrospun fiber membrane; the thinner the fiber membrane, the higher the light transmittance; for example, combined with electrospinning / Mesh technology to manufacture ultra-thin nanofiber or nanoarachnoid air filters with high performance; however, its disadvantages are poor mechanical properties and harsh process conditions, which means that the nanoarachnoid thickness is around 30nm, which is too thin, Cannot be used independently, and takes a long time to prepare

In conclusion, the existing methods for preparing transparent electrospun fibrous membranes are relatively complicated and lose the advantages of fibrous membranes.

[0005] Therefore, it remains a great challenge to develop transparent electrospun fibrous membranes with high light transmittance, high porosity, and self-support.

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