An online adjustment method and electrospinning device for electrospinning filament diameter

Abstract

The invention relates to the field of electrostatic spinning, in particular to an electrostatic spinning wire diameter online adjusting method and an electrostatic spinning device. The method includesthe steps: inputting spinning material natures including thermoplasticity and thermoset and pre-set fiber wire diameter d0 into a control system; shooting a spinning yarn deposition position in a collecting plate by a camera in an alignment manner to obtain a spinning fiber electron microscope image; processing the spinning fiber electron microscope image, extracting a spinning yarn profile image, and calculating current spinning fiber wire diameter d1 according to the spinning yarn profile image; comparing d1 and d0, and controlling the temperature of the collecting plate to rise or fall according to the spinning material natures and a comparing result. According to the method, the spinning fiber wire diameter is adjusted by the aid of effect of the temperature of the collecting plate onthe spinning fiber wire diameter, the problem of uncontrollable current electrostatic spinning wire diameter is improved, and more stable and high-accuracy spinning fibers are acquired.

Description

technical field [0001] The invention relates to the technical field of electrospinning, in particular to an online adjustment method and an electrospinning device for electrospinning filament diameter. Background technique [0002] Electrospinning is a special fiber manufacturing process in which polymer solutions or melts are jet spun in a strong electric field, which can produce polymer filaments with nanometer diameters. The traditional electrospinning device mostly uses a constant DC voltage to form a DC electric field between the nozzle and the collecting plate. This method has the following defects: During the injection process, because the jet carries the same charge, a repulsive Coulomb force is generated. , resulting in increased jet instability, decreased controllability of the spun fiber, and inability to accurately control the diameter of the spun fiber; moreover, since the jet is directional under the action of an electric field, the conductivity of the substrat...

AI Technical Summary

Problems solved by technology

The traditional electrospinning device mostly uses a constant DC voltage to form a DC electric field between the nozzle and the collecting plate. This method has the following defects: During the injection process, because the jet carries the same charge, a repulsive Coulomb force is generated. , resulting in increased jet instability, decreased controllability of the spun fiber, and inability to accurately control the diameter of the spun fiber; moreover, since the jet is directional under the action of an electric field, the conductivity of the substrate decreases as the deposition thickness increases. The electric field between the nozzle and the substrate is weakened, which eventually leads to different sizes of fibers obtained. The unreachable size and other parameters limit the accuracy and production efficiency of fiber collection, thus affecting its industrial production and additive manufacturing. Application prospects in the field of manufacturing

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