Melt electro-spinning device and technology capable of mixing supercritical gas

Abstract

The invention relates to a melt electro-spinning device and technology capable of mixing supercritical gas. The device comprises a power device, an extruding device, a supercritical gas generator and a melt electro-spinning device body. The technology comprises the steps that polymer is firstly added into a charging barrel, heated to a melt state, and mixed with supercritical gas conveyed by the supercritical gas generator; the mixture is conveyed to a static mixer, and the polymer and the supercritical gas form a gas / polymer homogeneous system through the static mixer; the mixture is fed to the melt electro-spinning device body, the polymer is blown, pulled and thinned under the action of high-speed hot gas flow input in an electric field between a spray nozzle and a receiving device and a gas flow channel, and finally the mixture is deposited on the receiving device to obtain fibers. According to the melt electro-spinning device and technology capable of mixing supercritical gas, the extruding device and the melt electro-spinning device body are combined, and therefore nanofibers with good uniformity can be prepared continuously and stably.

Description

technical field [0001] The invention relates to a melt electrostatic spinning device and process, in particular to a melt electrostatic spinning device and process of mixing supercritical gas, belonging to the field of electrostatic spinning. Background technique [0002] Electrospinning is a special fiber manufacturing process in which a polymer solution or melt is jet-spun in a strong electric field. Under the action of an electric field, the droplet at the needle will change from a spherical shape to a conical shape (that is, "Taylor cone"), and extend from the tip of the cone to obtain a fiber filament, and the diameter of the fiber filament can reach the nanometer level. [0003] As one of the most important methods to obtain nanofiber materials, electrospinning technology has great application prospects in filter materials and oil absorption due to its high porosity and specific surface area. In particular, melt electrospinning, compared with solution electrospinning,...

AI Technical Summary

Problems solved by technology

In particular, melt electrospinning, compared with solution electrospinning, is more advanced and environmentally friendly, but the fiber diameter is thicker, which restricts its further development

In the prior art, the U.S. patent (publication number: US20090121379A1) uses hot air to assist and reduce the fiber diameter through hot air blowing, but it acts on a single fiber, and the efficiency is low

In the prior art, there is still some assistance by adding a magnetic field during the spinning process, but in general, melt electrospinning cannot produce nanofibers in large quantities.

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