The Effect of Calcium Chloride on Polyamide 6 Electrospun Fibers

Abstract

The effects of calcium chloride (CaCl2) on polyamide 6 (PA6) electrospun fibers were investigated on this study. The interaction between CaCl2 and PA6 could affect the crystaline of PA6. XRD, DSC and FTIR revealed that the crystaline of PA6 reduced with increasing CaCl2. Moreover, the addition of CaCl2 could modify PA6 spinning solution properties, i.e., conductivity, surface tension and viscosity. The interaction between CaCl2 and PA6 has an important influence on morphological appearance and sizes of the resulting PA6 electrospun fibers.

Separation of polyamide 66 from mixtures with cellulose fibers by selective dissolution in calcium chloride‐ethanol‐water solvent

“…Lewis acid complexation with polyamide reduces crystallinity, which is manifested in X‐ray diffraction patterns by loss in distinction of the α 1 and α 2 peaks, 20,28–30 but that was not observed for any of the recovered PA 66. However, the ratio of α 1 /α 2 peak intensities was greater in PA 66 recovered in the m ‐set as compared to i ‐set.…”

Formation of Three‐Dimensional Polysuccinimide Electrospun Fiber Meshes Induced by the Combination of CaCl2 and Humidity

“…The occurrence of the wrinkled fiber surface is explained by the formation of thin skin on the surface of the liquid jet, which collapses, [ 35 ] by the formation and collapse of droplets formed on the surface of the jet, [ 36 ] or by the phase separation on the surface of the polymer jet. [ 37 ] However, inorganic salt additives are able to precipitate on the surface of the fibers as was demonstrated in the case of nylon‐6/GaCl 3 , [ 38 ] polyamide‐6/CaCl 2 , [ 39 ] and chitosan/different salt fibers [ 40 ] resulting in amorphous surface structure. Pai and co‐workers also demonstrated that the surface morphology of polystyrene fibers significantly depends on the relative humidity of the environment, and low humidity favors the formation of wrinkled fibers.…”