A kind of preparation method of centrifugal spinning nanofiber body type material

Abstract

The invention relates to the field of nanofiber material processing, and aims to provide a preparation method of a centrifugally spinning nanofiber body type material. The method includes: performing centrifugal spinning with a light-cured spinning solution to obtain fluffy nanofiber aggregates; placing the nanofiber aggregates obtained by centrifugal spinning into a transparent mold, and irradiating and forming with an ultraviolet lamp to obtain nanofiber blocks; The nanofiber bulk is soaked in a crosslinking agent solution, and then heated for crosslinking reaction to form a nanofiber bulk material. The invention directly cross-links and solidifies the fluffy three-dimensional block spun by the centrifugal spinning method, reduces the damage to the fiber structure, and ensures that the nanofiber block has better mechanical properties. The double cross-linking method, that is, the light-curing method, is used to cross-link the interior of the fibers, and the cross-linking agent solution cross-links the bonding points between the fibers, so that the material has excellent structural stability and higher mechanical strength; the process is simple, the operation is convenient, and the cross-linking process Rapidly, the process time is greatly shortened, and it is suitable for mass production.

Description

technical field [0001] The invention belongs to the field of nanofiber material processing, in particular to a preparation method of a centrifugally spinning nanofiber body type material. Background technique [0002] In the 1980s, with the rise of nanoscience and technology, nanofibers gradually attracted people's attention. Nanofibers exhibit specificity in physical and chemical (optical, electrical, thermal, magnetic, etc.) properties due to their large specific surface area. For more than 30 years, nanofibers have been widely used in textile, food, medicine, biology, chemical industry, energy, electronics, optics, sensors and other fields. At present, the main preparation methods of nanofibers include chemical method, phase separation method, self-assembly method and spinning processing method. Spinning processing method is considered as the most promising processing method, which generally includes electrospinning method, bicomponent method Composite spinning, melt bl...

AI Technical Summary

Problems solved by technology

However, these technical solutions all use electrospinning to prepare nanofibers, then cut them into short fibers, disperse them and freeze-dry to obtain nanofiber aerogels, in which high-speed stirring and shearing force will destroy the nanofiber structure and affect its mechanical properties. Intensity; and the freeze-drying process generally takes several days, which is not suitable for mass product development

Chinese patent CN104674384A discloses a "three-dimensional oil-water separation material based on electrospinning technology and its preparation method", which uses a solvent to directly collect electrospun nanofibers and freeze-dry the obtained nanofiber solution, then carbonize and coat a layer Oleophilic and hydrophobic membranes form a three-dimensional oil-water separation material. Similar to this kind of technical scheme, the nanofibers are directly scattered in the solvent without cutting, which ensures the mechanical strength of the airgel material, but most of the internal fiber dispersion is disorderly and chaotic. Uncontrollable internal structure

At present, the introduction of centrifugally spun nanofiber products reported in the existing literature is still based on two-dimensional membrane materials, and some reports on the use of centrifugally spun nanofibers to prepare one-dimensional yarns, but there is a lack of research on three-dimensional structures.

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