Method for preparing micro-nano fibers with twisted spiral structure

Abstract

The invention relates to a spinning method for micro-nano fibers with a twisted spiral structure in the technical field of electrostatic spinning, in particular to a method for preparing micro-nano fibers with a twisted spiral structure by adopting electrostatic spinning technology. The method comprises the following steps: mixing polyvinylpyrrolidone, inorganic compound and anhydrous ethanol according to a weight ratio of 4:0.2:15-18, in a magnetic heating stirrer under the condition of normal temperature, mixing and stirring the mixture for 1 to 3 hours, and keeping the mixture stand for 1 hour to obtain precursor spinning solution; embedding a metal needle into a hollow needle of a common spinning nozzle to manufacture a sub-conducting core electrode; and then filling the prepared precursor spinning solution into a spinning device, placing a glass slide on a lead foil collector, keeping the distance between the nozzle needle and the collector between 10 and 20 centimeters, switching on a direct current voltage of 10 to 20 kilovolts for 10 to 30 seconds, then switching off a high-voltage power supply, and collecting a product on the glass slide. The equipment structure is novel, the preparation process is simple, the principle is reliable, the quality and the structure of the finished product are good, the production efficiency is high, and the popularization and application properties are strong.

Description

Technical field: [0001] The invention relates to a spinning method in the technical field of electrospinning of micro-nano twisted helical structure fibers, in particular to a method for preparing twisted helical micro-nano fibers by using the electrospinning technology. Background technique: [0002] Twisted helix structure is a very important form of fiber structure in nature (such as wool; in addition, the well-known life genetic material deoxyribose nucleic acid DNA is a double helix structure), this helical structure makes the fiber have strong flexibility, micro Elasticity and high porosity have broad application prospects in many fields such as clothing textiles, microelectronic devices, advanced optical components, adsorption filter materials, and drug delivery. At present, it has been reported to prepare helical tube structure carbon fibers by vapor deposition, evaporation treatment method, sol-gel shrinkage method, etc., as well as helical structure fibers of inorg...

AI Technical Summary

Problems solved by technology

To sum up, the existing technologies generally have disadvantages such as relatively complicated processes, poor popularization and applicability, and high production costs.

Images