Preparation method of nanofiber

Abstract

The invention relates to a preparation method of nanofiber, wherein the method comprises the following steps of: (1) preparing a solution, wherein, after polyvinyl pyrrolidone and alcohol are mixed according to a certain proportion, stirring for 3-4 hours to obtain transparent viscosity solution, and filling the viscosity solution in a liquid storage bottle; (2) connecting the liquid storage bottle with a liquid conveying port of a spray gun through a solution input pipe, and connecting the air conveying port of the spray gun with an air compressor; (3) disposing the nozzle of the spray gun opposite to the front end of a fiber drawing cavity, starting the air compressor, and ejecting the viscosity solution into the fiber drawing cavity, wherein the liquid drops of the viscosity solution is drawn into nanofibers with the diameters of 100-300 nm at once, and the nanofibers are fallen in a collecting device from the fiber outlet of the fiber drawing cavity. With spraying fiber drawing technology, the micrometer liquid drops are finally drawn into uniform nanofibers under the effect of a temperature field formed by an iodine tungsten filament lamp so that the defect that the traditional nanofiber has low yield is solved.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a method for preparing nanofibers. Background technique [0002] Nanofibers, in a strict sense, refer to fibers with a fiber diameter in the range of 1 to 100 nm. In a broad sense, fibers with a diameter in the range of 100 to 1000 nm are also nanofibers. Many unexpected and novel properties emerge when the diameter of fibers shrinks from micrometers to nanometers. Nanofibers have a large specific surface area (1000 times that of ordinary microfibers), a very high aspect ratio (length-to-diameter ratio), curvature radius, and strong interpenetration with other substances. The unique properties of nanofibers make them have huge market potential in the fields of membrane materials, luminescent materials, filter media, sound-absorbing media, thermal insulation materials, catalysts, electronic products, biological products, and composite reinforcement materials. [0003] The national ...

AI Technical Summary

Problems solved by technology

The more promising nanofiber manufacturing processes mainly include electrospinning, melt-spinning and composite spinning, but the low output of electrospinning, the relatively large fiber diameter of melt-spinning and the complicated process of the sea-island method hinder Large-scale industrial application of nanofibers; at the same time, due to their own limitations and shortcomings, the extreme conditions of the process-such as the high voltage of electrospinning (several kV or tens of kV), the requirement of good conductivity of the solution, the melt spinning The high temperature (300-500 ℃) and the high temperature and chemical treatment environment of the sea-island method bring difficulties to the preparation of related biomedical nanofibers and other materials, limiting and hindering the development and application of nanobiomedicine and other industries

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