High-Throughput Fabrication Of Nanofibers Using An Air Injection Electrospinning And Its Mechanism Study

Electrospinning has been recognized as a simple and efficient technique for the production of polymer nanofibers.Conventional single-needle electrospinning inhibits the application of nanofibers to commercial applications due to its low production.It is desirable to obtain massive production of quality nanofibers to broaden the applications of nanofibers.Many efforts have concentrated on enhancing the production of the electrospinning technique.Bubble-electrospinning is one of the most influential needleless electrospinning,which provides a high-throughput method to produce nanofibers.However,it is difficult to control the bubble forming process,the instability of spinning process and the non-uniform of nanofibers.In order to overcome the defects of bubble-electrospinning,an air injection electrospinning(AIE)was presented to obtain high throughput fabrication of quality nanofibers based on bubble-electrospinning.Firstly,an AIE was designed and developed to obtain high throughput fabrication of quality nanofibers based on bubble-electrospinning.Numerical analysis and experiment verification will be carried out to research mechanical mechanism of jets arising in the AIE.The motion of jets was observed by a high definition camera at a frame rate.The electric field distributions were calculated by the Maxwell 2D,and the simulation results were in good agreement with the experimental results.Based on the above results,the AIE method and setup will be developed,improved and optimized continuously.Secondly,high throughput fabrication of quality nanofibers was prepared by controlling electrospinning parameters.The morphology and properties of nanofiber were investigated by a combination of X-ray diffraction(XRD),universal testing machine,scanning electron microscopy(SEM)and et al.The effects of electrospinning parameters on nanofiber quality and production were systematically investigated.The results showedthe quality and production of nanofibers were improved with the increase of applied voltage.Compared with the BE,the MFSE could produce nanofibers under a much higher applied voltage which would result in decreasing the nanofiber diameter,enhancing the diameter distribution,and improving the nanofiber throughput.Finally,an AIE combined with a high speed rotating copper wire drum as a collector,was presented successfully to obtain high throughput preparation of aligned PAN nanofibers.The method will generate easily high-throughput aligned nanofibers to broaden the application prospect in the fields of optoelectronic devices and biomaterials.