Teaching demonstration device for electrostatic spinning

Abstract

The invention belongs to the technical field of electrostatic spinning, and relates to a teaching demonstration device for the electrostatic spinning. The teaching demonstration device mainly comprises an electrostatic induction machine with a discharge rod being removed, an injector metal bracket, an injector filled with a spinning solution, a wire, a hollow stainless steel needle, electrified jet flows or spinning fibers, a metal net collector and a collector metal bracket, wherein one end of the injector metal bracket is welded with a metal bar at the top of a leyden jar in the electrostatic induction machine with the discharge rod being removed; the other end of the injector metal bracket is used for fixing the injector; one end of the wire is connected with the injector metal bracket; the other end of the wire is connected with the hollow stainless steel needle mounted on an injector needle tube; one end of the collector metal bracket is welded with a metal bar at the top of another leyden jar in the electrostatic induction machine with the discharge rod being removed; and the other end of the collector metal bracket is welded with the metal net collector. The teaching demonstration device is simple in structure, reliable in method and principle, low in fabrication cost, good in demonstration effect, high in safety and environmentally friendly; and demonstration conditions are easy to achieve.

Description

Technical field: [0001] The invention belongs to the technical field of electrospinning, and relates to an electrospinning teaching demonstration device, which is used for the teaching of nanotechnology or nanomaterials, and realizes economical, safe and intuitive teaching demonstration of electrospinning in nanotechnology. Background technique: [0002] The nanotechnology that emerged in the 1980s is a new branch of physics, chemistry, materials science, electronics, biology and other disciplines. Nanomaterials mainly include zero-dimensional atomic clusters, quantum dots, nanoparticles, one-dimensional Nanowires, nanotubes, nanofibers, two-dimensional nanofilms, three-dimensional nanosolid materials, and various nanocomposites. At present, major universities in China have successively offered undergraduate and master courses in nanotechnology or nanomaterials. However, there are still few related classroom demonstration experiments and students' innovative experiments. Th...

AI Technical Summary

Problems solved by technology

Although there are many types of existing electrospinning devices, their composition and structure are relatively complicated, and most of them are not suitable for teaching demonstration devices

The Chinese patent application No. 201110255225.8 discloses "a rotating disk induction electrification type electrospinning device", which is designed and manufactured by induction electrification for experimental teaching, but because the device will induce The generator and electrospinning are separated to make its structure relatively complex; in addition, the device uses 30wt% polyvinylpyrrolidone (PVP, molecular weight 58,000) ethanol solution or office glue as the spinning precursor solution. Due to the thinner fibers formed by PVP, the spinning process is not easy to observe and a dense film structure will be formed on the collector after spinning, and the spinning phenomenon is not obvious enough; office glue is not easy to form spinning, and the amount of fibers is very small. The spinning phenomenon is not obvious, resulting in unsatisfactory teaching and demonstration effects

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