Electrostatic spinning method and device for controlling fiber adhesion

Abstract

The invention relates to an electrostatic spinning method and a device for controlling fiber adhesion. An oil sprayer and a drying device relative to the surface of a collector are arranged on an electrostatic spinning device comprising an electrode spinneret and the collector; fibers initially formed on the collector are sprayed with oil; the oiled fibers leaving the collector are dried; and spray flow, drying speed and temperature are matched so as to effectively control the fiber adhesion in the process of electrostatic spinning and ensure that the fibers are kept in a mutually separate state or a controlled adhering state during follow-up treatment. The method can also be used for the surface function modification of electrostatic spinning fibers to prepare functional electrical spinning fiber, and is convenient and easy to operate.

Description

technical field [0001] The invention relates to an electrostatic spinning method and device, in particular to an electrostatic spinning method and device for controlling fiber adhesion. Background technique [0002] Electrospinning is currently the most effective spinning method to obtain nanometer or submicron fibers. The diameter of the obtained nanofibers is generally between tens of nanometers and micrometers, and the pore size of the non-woven felt is from several micrometers to hundreds of micrometers. Between them, with ultra-high specific surface area and large porosity, the orientation of fiber molecular chains and the rearrangement of lattice will show more excellent mechanical properties, and nano or submicron carbon fibers can be prepared through subsequent pre-oxidation and carbonization processes , is an important reinforcing material for the preparation of high-performance composite materials. The electrospinning process and device are completely different fr...

AI Technical Summary

Problems solved by technology

Usually, the volatilization of solvent is used to control the adhesion between fibers in the electrospinning process. However, since electrospinning requires a large amount of solvent, it is difficult to effectively control it. Therefore, there are few research reports on controlling the adhesion of electrospun fibers.

In traditional fiber spinning, in order to prevent the spun fibers from sticking together, the spun fibers (or fiber bundles) are often first passed through an oil immersion tank to oil the fibers (oiled), and then collected by winding rollers. , but because the electrospinning process and device are completely different from the traditional spinning process, its collector speed is very fast, the traditional method of impregnating the oiling agent will be splashed by the high-speed rotating collector, and the electrospun fiber filaments are very fine , the fiber is not only easy to break, but also impregnated with too much solvent is not easy to volatilize, so it is difficult to oil the electrospinning process through the traditional impregnation oiling agent method

Chinese Patent Application No. 200410025622.6 reports that a coagulation bath is introduced in the electrospinning process, that is, a coagulation bath with electrodes is arranged below the spinneret, and the fine stream of solution ejected from the spinneret is received by the coagulation bath device, and is coagulated into fibers by a coagulant. The application of this device can prevent the adhesion of fibers to a certain extent, but the implementation is relatively complicated. It is necessary to change the traditional electrospinning collection device, and it is difficult to control the coagulation process and the spinning process. It is necessary to add coagulation liquid and other processes to improve The cost of spinning is reduced, and the final spun fiber is not protected by oil agent, and further adhesion will inevitably occur in the subsequent processing

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