Research Of Multi-functional Electrospinning System And Its Application

As a simple and flexible method to produce nano-materials, electrospinning hascaused wide concerns and gets rapid development in recent years. However, it usuallytends to get nanomaterials with single structure, which seriously restricts the applicationdevelopment of electrospinning. How to generate diversified nanofiber structures is a bigchallenge to electtrospinning. This research, namely research of multi-functionalelectrospinning system and its application, is proposed according to the issue above.To develop multi-functional electrospinning system, this paper analyzes properties ofelectrospinning and the barrier to build diversified nanofiber structures, and then putsforward strategies accordingly. It is found that using dynamic collecting or improvingelectric field distribution is beneficial to improve fiber orientation. From this point of view,this paper discusses the process to fabricate diversified nanofiber structures. Finally, adiameter tunable cage rotor is selected as the collector in order to prepare nanofibermaterials.On this basis, this paper establishes the concrete proposal of multi-functionalelectrospinning system. The collector, using a centrifugal action based tunable cage rotor,which consists of links and slides, is able to adjust the diameter automatically by changingthe rotor speed. The injection pump adopts screw nut linear motor as the actuator toachieve a straight line reciprocating movement. Outsourcing high voltage power supplyhas the control port that makes it easy to be controlled. A PLC is used as the controller toconduct the electrospinning process by regulating the injection pump, collector and highvoltage power with the help of a human-machine interface.It is approved that this system can receive expected functions by achieving onedimensional ordered nanofiber arrays, two dimensional regular nanofiber membranes andthree dimensional nanofiber structures through the proposed multi-functional system.Combining with specific experiment, this paper analyzes the mechanism to constructdiversified nanofibrous structures, and summarizes influence of key process parameters on fiber morphology. Finally, characteristics of fiber material fabricated by multi-functionelectrospinning system are discussed, and then it is applied to skin tissue engineering andlithium-ion battery research.