Effects Of The High Viscosity Solution And Conductive Particles On Bubble-Electrospinning

As one kind of important nanomaterias, nanofibers are concerned by more and more people, their production process, development and application attracts a large quantity of scholars, researchers and scientists to go into this subject and do in-depth research. In this process, the electrospinning plays a great role in nanofiber production because of its simplicity and availability. However, the tip area of spinning nozzle in the classic-elctrospinning is lesser and the capillary is easily blocked, so this method is not used to produce mass of nanofibers. Based on this, many scientists have spent a lot of human, material and financial resources on the research of the nass production of nanofibers, some researchers have achieved good results in this direction, and the bubble-electrospinning proposed by our team can also play an effective role on the mass production of nanofiber.In the process of bubble-electrospinning, many Taylor cones can form on a bubble surface, if the surface of the liquids expands and the number of bubbles increases, the fiber production is greatly improved. Liu Yong and Ren Zhongfu have done some research about the effects of common process parameters, external conditions, the solution parameters on the morphology and throughput of nanofibers, and meanwhile came up with and established the related theory model, however, in their previous works, the differences between the bubble-electrospinning and classic-electrospinning wasn't analyzed as an individual chapter, my subject states the differences in detail. Besides, effects of the high viscosity solution and conductive particles on bubble-electrospinning process and products are seriously studied.Based on this, my subject firstly expounds the difference between the bubble-electrospinning and classic-electrospinning from spinning principles, spinning device, spinning process and the morphology of nanofibers, and this thought is through the whole article. In bubble-electrospinning, a great many of jets drived by the airflow from bottom to top form on the surface of taylor cone, and then is drawn into many nanofibers, but in the classic-electrospinning, one or a few jets drived the syringe form on the taylor cone surface and turn into fewer nanaofibers. Especially, in the subject, the influence of high viscosity solution and conductive particles to two kinds of spinning ways is studied experimentally and theoretically, the different influences have been analyzed. In addition, in view of the high viscosity electrospinning, we have done some research on the effects of an external voltage, collecting distance, different proportion of alcohol and water in solvents and mineral salt on bubble electrospinning fiber morphology and yield in the process of bubble-electrospinning. Because the mixing of NaCl leads to the disappearance of nanofibers, chapter 4 of the article separately elaborates the influence of inorganic salt, surfactant, nano-graphite to the bubble electrospinning process and products. In the experiments, we use four kinds of polymers (PEO,PVA,PVP,PET) as spinning materials and succeed in spinning, which proves that bubble-electrospinning is a feasible and effective way to produce mass of nanofibers.