Preparation and Characterization of Hydrophilic Wetting-Modified Polyamide Fibers

Abstract

To improve the moisture absorption and air permeability of polyamide (PA) fibers, the modified fibers with porous structure were fabricated by melt spinning using polyethylene glycol (PEG) as the pore-forming agent due to its high solubility in water. The effects of pores caused by different PEG contents on the structure and properties of modified fibers were analyzed by electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and water contact angle. These results indicate that the porosity of modified fibers increases with PEG content increasing. Moreover, the formation of pores obviously affects the crystal forms of modified fibers. The alpha crystal gradually decreases and the gamma crystal increases with the porosity increasing. Furthermore, with respect to the modified fibers obtained from 47.33% PEG content, its water absorption increases from 3.78% of pure PA to 19.76% and its contact angle decreases from 116° to 85°. In addition, due to the interaction of hydrogen bond occurring between PA and PEG during the spinning process, the elongation at break, rupture work, and initial modulus of modified fibers were improved when the porosity was not more than 4.23%.

Antialgal Synergistic Polystyrene Blended with Polyethylene Glycol and Silver Sulfadiazine for Healthcare Applications

“…The PSP5 blend with 5% PEG concentration has demonstrated contact angle of 66 ° [26]. By increasing the concentration of PEG up to 10% in the PSP10 blend, the contact angle was found to be 63 ° [27]. The PSP15 and PSP20 blends with 15% and 20% concentration of PEG shown to have the contact angles of 65 °and 53 °, respectively [27].…”

“…By increasing the concentration of PEG up to 10% in the PSP10 blend, the contact angle was found to be 63 ° [27]. The PSP15 and PSP20 blends with 15% and 20% concentration of PEG shown to have the contact angles of 65 °and 53 °, respectively [27]. Since PEG is hydrophilic in nature due to the presence of hydroxyl group, therefore by increasing the PEG contents, it has increased hydrophilicity of the blends which has resulted in the decrease of water contact angle [28,29].…”

Electrospun Polyacrylonitrile/Lignin/Poly(Ethylene Glycol)-Based Porous Activated Carbon Nanofiber for Removal of Nickel(II) Ion from Aqueous Solution

“…PEG as a pore-forming agent was removed during selective dissolution because it is a low molecular weight compound that is readily soluble in water and can promote the development of a porous structure on the surface of the fibers. The average diameter of the fiber is 323 ± 11 nm, which has slightly reduced, but is insignificant [ 33 , 34 ].…”

“…In the highly acidic state of Ni(II) ions solution, the concentration and mobility of hydrogen ions are relatively higher because the negative functional groups located on the active site of ACNFs can bind easily with the hydrogen ions compared with Ni(II) ions [ 49 ]. This is due to the electron repulsion and competition between Ni(II) ions and hydrogen ions in binding at the surface of ACNFs that can inhibit the uptake of the metal ions such as Ni(II) ions into the active site of ACNFs [ 33 , 59 ]. The adsorption sites on the ACNFs for the uptake of metal ions increased with increasing pH [ 32 ].…”

Porous Fiber Processing and Manufacturing for Energy Storage Applications

“…Once filaments come out from nozzles, they are cooled down by gases or fluids. In the work performed by Li et al [61], porous polyamide (PA) fibers were prepared through melt spinning by the use of polyethylene glycol (PEG) as a pore-forming agent. As shown in Figure 6 [61], PEG was melted at 90 • C. Then granular PA was added into PEG melt and stirred by a mechanical stirrer for 5 h. In order to obtain PA fibers with varied, different PEG content levels including 0%, 8.85%, 18.79%, 28.25%, 38.66% and 47.33% were adopted to make the blends.…”