ScholarWorks@중앙대학교

초록

The research described focuses on the fabrication of porous fiber using a method called a non-solvent induced phase separation (NIPS) as an alternative to electrospinning. The process involves preparing a polymer solution of PVA- g-GMA/PAA with water as the solvent and inducing precipitation by exchanging the solvent with IPA, a non-solvent solution that has an affinity to water. The resulting porous fiber is then dried at room temperature. The study explores various factors affecting the porous structure of the fiber, including the types of crosslinking (chemical, ionic, or covalent), solution concentration (10-16 wt%) and precipitation time (15 min - 24 hrs). Different concentrations of GMA (0.05, 0.15. and 0.25) were used in the grafting with PVA to prepare polymer solution, and the effect of the PVA-g-GMA to PAA ratio was studied at 7:3; 6:4; 5:5 and 4:6. The results indicate that the best pore structure was achieved at 6:4 and 10 wt%. A precipitation time of 24 hrs was found to be sufficient for obtaining a complete porous fiber structure. The pore size of fibers was classified as micro-porous, range from 500 nm to 1 um. In conclusion, the study successfully produced a porous structure of PVA-g-GMA fiber under the selected conditions, suggesting potential applications in fiber fabrication. © 2025 Author(s).