Impact of Electrospinning and Process Parameters on Closed Linear Spinneret
A electrospinning device with closed linear spinneret was designed to solve the problems of low yield,needle blockage,and solvent evaporation.The electric field distribution of open and closed rollers was simulated by Comsol software,and the electric field strength of each metal wire was studied.The effects of four process parameters,including polymer solution concentration,working voltage,spinning distance,and rotation speed,on the morphology of PVDF nanofibers were studied through orthogonal experiment.A multiple regression model between process parameters and nanofiber diameter was established by response surface methodology,and the impact of four process parameters on nanofiber diameter was evaluated.The average diameter(MFD)of nanofibers obtained from orthogonal experiments is 93.85～206.42 nm,with a relative standard deviation(RSD)of 29.28％～45.13％.The research results indicate that PVDF nanofiber MFD is significantly affected by polymer solution concentration and spinning distance,but not significantly affected by working voltage and rotation speed;the MFD of PVDF nanofibers increases with the increase of polymer solution concentration,working voltage,and rotation speed,and decreases with the increase of spinning distance.
nanofiberselectrospinningelectric field simulationresponse surface method
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