An airflow-assisted linear tooth electrode electrospinning device

Abstract

The invention discloses an airflow auxiliary linear tooth electrode electrostatic spinning device. A fiber emitting electrode of the electrostatic spinning device is a linear tooth electrode. The linear tooth electrode is a metal wire with the surface provided with a plurality of micro-tip teeth. The linear tooth electrode is connected with a positive electrode of a high voltage direct-current power source. A collecting electrode is arranged over the linear tooth electrode and connected with a negative electrode of the high voltage direct-current power source or grounded. An air supply system jetting airflow upwards is arranged under the linear tooth electrode. The linear tooth electrode is further provided with a liquid supply system applying a spinning precursor solution to the linear tooth electrode. The device adopts the non-needle-head technology, the problem of needle head plugging can be avoided, meanwhile, the spinning efficiency can be remarkably improved, the spinning voltage can be effectively decreased, the raw material utilization rate can be improved, the cost can be lowered, and large-scale production of micro-nanofiber can be achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of micro-nano materials, and in particular relates to an air-flow-assisted linear tooth electrode electrospinning device. Background technique [0002] In 1934, Formhals successfully prepared polymer fibers using high-voltage electrostatic force for the first time, and proposed the concept of electrospinning. The principle can be briefly described as the polymer solution or melt overcomes the surface tension to form a charged jet under the action of a high-voltage electrostatic field. fiber. Compared with other fiber preparation methods such as drawing method, template method, vapor deposition method, self-assembly method, and hydrothermal synthesis method, electrospinning has strong controllability, simple principle, convenient operation, flexible spinning conditions and low cost. It has become a late-start and fastest-growing nanofiber preparation method due to its advantages of low cost, ...

AI Technical Summary

Problems solved by technology

However, during the electrospinning process, the spinning liquid tank is always in an open state, and the solvent is very volatile, causing environmental pollution, the concentration of the spinning liquid is unstable, and the thickness of the electrospun fibers is uneven.

In addition, the surface of the drum electrode is smooth, and the charge distribution is relatively dispersed, which is not conducive to the formation of Taylor cones, and requires a high spinning voltage

Images