Centrifuge fiber-spinning setup for production of micro/nano fibers

Abstract

Fiber spinning using centrifugal forces is one of the more interesting techniques to produce polymer nanofibers. At present, this technique is still underdeveloped. More research is required to fine-tune the morphology of the nanofibers. Polymer nanofibers can be used for a whole range of applications, such as protective clothing, energy storage, drug delivery systems, filtration and tissue engineering. The goal of this research is to develop a stable and highly adjustable centrifuge, which can produce nanofibers from a solution of polystyrene (PS) and tetrahydrofuran (THF). The emphasis in this research is on designing the centrifuge. This is facilitated using 3D modeling software. Drawings are created and sent to a workshop, where the centrifuge is manufactured using durable materials like aluminum and inox. The centrifuge is designed to be highly adjustable to enable easy operation. The size of the fibers can be adapted using a spinneret with different orifice sizes, measuring 0.3 mm, 0.6 mm and 1.0 mm. Different concentrations of PS in THF are tested ranging from 17.5 to 25 wt%. Other variables allow changing the morphology of the fibers, such as the collection distance and the adjustable rotation speed. Preliminary testing reflects results from other studies, which indicates that the centrifuge is working properly. Further testing will reveal which variables have the highest impact on the morphology of the fiber. Variables concerned are the collection distance, the orifice size, the rotation speed and the concentration.