Micro And Nano Fibers. Electrospinning Preparation Fluorescent Substances Doping

Electrospinning has been widely studied because of its simple, inexpensive, environment-friendly and can be continuous and efficient preparation of micro/nanofibers, and has broad application prospects in physics, chemistry and biology.In this thesis, the improvement of the electrospinning was studied and variety of morphologies and structures of composite micro/nanofibers via improved electrospinning device, the different parameters of electrospinning on fiber morphology was also discussedThe different morphologies and structures of the fluorescent materials doped with different composite micro/nanofibers such as non-woven form, bead structure, network structure, band structure, spiral structure, spheric structure, ordered parallel-structure, cross-structure and twisted-rope structure were prepared by ordinary electrospinning and improved electrospinning device.The main results are summarized that the preparation of fibers by centrifugal electrospinning which combined the centrifugal spinning and electrostatic spinning.The centrifugal electrospinning have many advantages in the preparation of ordered fibers, such as low supplied voltage, high degree of order, good repeatability, easy to collect and many others. The optimal conditions for preparation of the highest order degree of parallelled PMMA(Poly(methyl methacrylate)) and PS(Poly(styrene)) was discussed and obtained. The cross structure fibers was prepared successfully based on the study of ordered fibers and the relative independence of the collector. It is noteworthy that the vertical and horizontal structure of cross-fibers can be the same material and also can be the different materials which is extremely convenient in the preparation of cross-structure fibers. Paralleled helix-structure, paralleled bead-structure and twisted-rope structure was prepared by changing the spinning parameters which broad the field of fiber morphology. The improved electrospinning device have great advantages and potential applications in nano-electronic devices and optical devices.