Producing Porous Polyacrylonitrile Fibers Using Wet-Spinning Method for Making Carbon Fibers

Investigation of the increment in the porosity and diameter of polyacrylonitrile (PAN) fibers during the wet-spinning process has great importance in producing carbon fibers and textile industries. In this study, the influence of several factors such as stretching and flow rate and also the presence of non-solvent on the porosity and diameter of the fibers have been investigated. PAN used in certain quantity as polymer, with DMF (dimethylformamide) as solvent and distilled water as non-solvent were combined under certain temperature to make dope wet-spinning process. At the final stage, the PAN fibers were ejected from the spinning machine under the various flow rates and porosity was generated in the fibers and then the fibers related to a sample were stretched by pulling device.