Development And Experiment Of Multi-functional Electrospinning Machine

Due to the outstanding characteristics of nanofibers,which have applied to several fields.And electrospinning technology has received extensive attention to prepare nanofibers.However,most of laboratory build a simple experimental platform to carry out the electrospinning experiment,the cost is high.So they don't suitable for the laboratory.It is necessary to development a multi-functional and low cost electrospinning machine.This paper studies the design of multi-functional electrospinning machine,the design and manufacture of the mechanical system,the design and implementation of control system,and the experimental research.Firstly,according to the performance indicators and the functional requirements of multi-functional electrospinning machine,the scheme is determined.The mechanical system is designed and divided into five modules:liquid supply module,collection module,motion platform module,mechanical box body and auxiliary module.The control system is designed and divided into five modules:liquid supply system control,collection system control,motion platform control,auxiliary system control and the design of the human machine interaction(HMI).Secondly,the mechanical system of multi-functional electrospinning machine is developed.The liquid supply module is made of multiple needle liquid supply system and electrospinning nozzle liquid supply system constrained by sheath gas,the rate of liquid supply can be adjusted in the range of 0.01-200.0 mL/h,the pressure of sheath gas can be adjusted from 0.02 MPa to 0.82 MPa.Collection module is contain flat collection,roller collection and coiling collection.The maximum speed of roller and coiling are both 500 rpm.The movement of the spinning nozzle is controlled by a three-dimensional mobile platform,the maximum speed and accuracy is 400 cm/min and 0.25%FS,respectively.Mechanical box body is divided into integral box,electric control cabinet box,touch screen box,the auxiliary module includes the lighting system and other parts.At last,the components are assembled together to form the mechanical system of the multi-functional electrospinning machine.Thirdly,the control system is designed based on the FX5U series PLC.According to the requirements of each control module,the circuit diagram is designed,and the I/O ports and the extension modules are assigned.Liquid supply system control includes the control of velocity and the nozzle height,collection system control includes the control of the collection motors,motion platform includes X,Y axis linear reciprocating trajectory,rectangular trajectory and grid trajectory.High voltage power is controlled by RS485 communication,air pressure is controlled by PID.The design of the whole HMI control system is completed.Finally,the mechanical property test and electrospinning experiment are studied.The following cases are experimentally verified,such as X,Y axis linear reciprocating,rectangular trajectory,grid trajectory,"?" type trajectory and roller collecting film experiment.Furthermore the influence of the moving speed of the nozzle and the height of the nozzle on the fiber line width are studied,when the moving speed increases from 100 cm/min to 400 cm/min,the fiber line width decreases from 11.31 ?m to 8.01 ?m,and the fiber line width decreases from 12.37 ?m to 5.19 ?m with the height of the nozzle increases from 1 mm to 6 mm.The test results indicated that the multi-functional electrospinning machine can meet the expected functional requirements.