Wet-spinning assembly of polyacrilonitrile/non-solvent reinforced fibers with improved structural order and mechanical properties
Volume Title: 1
1Department of Chemical Engineering, University of Kashan, Kashan, Iran
2Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran
In this work, polyacrylonitrile (PAN) fibers with adding non-solvent (H2O) have been prepared using wet spinning method. Tap-water has been applied as a coagulation bath and then it has diffused into PAN spinning solution which has led to a rapid PAN fiber solidification. All of synthesized fibers have been studied via field emission scanning electron microscope (FE-SEM) images, differential scanning calorimetry (DSC) analysis and X-ray diffraction (XRD) pattern. The cross-sectional morphologies of synthesized fibers show that presence of non-solvent in spinning solution reduces the number of micrometer channels and depth of the channels while increases number of finger channels. Also, XRD and DSC results presents that the PAN/H2O fiber has a higher crystallinity and, in this sample, the polymer chains become less degraded as heat is. All of these findings indicate an enhancement in the structural order of PAN/H2O fiber, which can ultimately improve the mechanical properties of them.