Simulation of electrostatic field in multi-needle water bath electrospinning and the effect of voltage on the structure of nanofiber cored yarn
The preparation of nanofiber yarns has been challenged by weak mechanical properties and incomplete uti-lization of their potential.To address these issues,the influence of voltage on the multi-needle electrospinning process was investigated,and a custom-built multi-needle water bath electrospinning device was employed to prepare skin-core nanofiber-coated yarns.Finite element analysis software(ANSYS)was used to simulate and analyze the electric field distribution generated by multiple needles,exploring the synergistic effects of multiple electric fields and the structure of nanofiber coating layers under different voltages.The morphology,porosity,coating ratio,crystallinity,and mechanical properties of the nanofiber-coated yarns were analyzed and tested.The results show that multi-needle wa-ter bath electrospinning technology can produce nanofiber-coated yarns with a well-defined skin-core structure.The diameter of the cortical nanofibers first decreases and then increases with increasing voltage.At 24 kV,the average dia-meter of the nanofibers reaches a minimum value of(101.42±17.25)nm,and the resulting nanofiber coating ex-hibits optimal mechanical properties with a breaking strength of(12.99±1.33)cN.The crystallinity of the nanofiber coating increases initially and then decreases with increasing voltage,reaching a maximum value of 16.45％at 26 kV.
nanofibercovering yarnmultiple needleselectric field simulationvoltage
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