Synergistic Coupling Mechanism And Experimental Study Of Dual Electric Fields In Melt Differential Electrostatic Spinning

As a new spinning technology,the current research on melt electrostatic spinning technology is still in its infancy,the research on melt electrostatic spinning equipment and mechanism need to be further explored and improved.How to ensure the stretching distance to make the fiber sufficiently fine at the same time to improve the electric field strength to increase the number of single nozzle jet is currently one of the problems of melt electrostatic spinning needs to be solved.In order to solve these problems,this paper proposes a double electric field synergistic coupling melt electrostatic spinning method.A double plate and ring plate structure is introduced above and below the plane where the tip of the spinning nozzle is located,and a high voltage electrostatic force is applied to form a double electric field,which is superimposed and coupled to the induced electric field formed at the spinning nozzle and then acts on the melt to form a jet.The following work has been done in this paper:1.The mechanism of the action of dual electric field electrostatic spinning has been studied,and the mechanism of the action of dual electric field structure position distribution,dual electric field regulating the range of fibre deposition,dual electric field low voltage increasing fibre number and refinement,dual electric field extending the spinning distance and increasing fibre number and refinement has been analysed.2.Discusses the various parts and functions of melt electrostatic spinning equipment,designs and develops a high-efficiency electrostatic spinning nozzle,focusing on the spinning nozzle and double electric field structure.3.The electric field and the electric field intensity distribution of the double electric field were simulated and analysed,and the factors influencing the electric field intensity of the double electric field were studied.The results show that: the electric field intensity at the tip of the spinning nozzle is proportional to the voltage,inversely proportional to the spacing between the lower electrode plate,proportional to the spacing between the upper electrode;the electric field intensity generated when the upper electrode is placed above the spinning nozzle is large;when the structure is double plate type,the electric field intensity value is proportional to the voltage between the upper and lower electrodes;when the structure is ring plate type,the electric field intensity value is proportional to the voltage between the upper and lower electrodes when the spacing between the upper electrode ring is 20 mm,and the other spacing,the electric field intensity value is proportional to the voltage between the upper and lower electrodes.The electric field strength is proportional to the voltage of the upper and lower electrodes when the spacing is 20 mm,and inversely proportional to the voltage of the upper and lower electrodes when the spacing is other;the electric field strength generated by the two electrodes at the tip of the spinning nozzle is greater than the electric field strength generated by the single electrode within a certain voltage and spacing range.4.Experiments show that: when the structure is double-plate type,the range of fiber deposition can be continuously regulated,and when the structure is ring-plate type,the range of fiber deposition cannot be continuously regulated;when the structure is doubleplate type,the low voltage of double electric field can increase the number of jets and fiber refinement compared with the high voltage of single electric field;when the structure is ring-plate type,the low voltage of double electric field cannot increase the number of jets compared with the high voltage of single electric field,and the fiber refinement is not significant;when the structure is double-plate type and ring plate type,a certain voltage range of double electric field to extend the spinning distance while increasing the number of fibers and fiber refinement.In summary,this paper concludes from the study of the dual electric field mechanism,electric field simulations and experiments that it is possible to achieve a regulated fibre deposition range,increased fibre number and refinement at low voltages,extended spinning spacing and increased fibre number and refinement when using the dual electric field method.The research results can be applied to the industrial production of electrostatic spinning,where the applied voltage can be reduced and the safety factor improved,and the fibre deposition range can also be regulated.