| 초록 |
Hydrogels are polymer networks that swell dramatically in the presence of abundant water. Those hydrogels that exhibit dramatic swelling transitions in response to environmental signals, such as pH, temperature, ionic strength, solvent composition, and magnetic fields, have been called smart hydrogels. Hydrogel fibers that were responsive to both temperature and pH were prepared through the electrospinning of poly(vinyl alcohol) reacted with N-isopropylacrylamide in water. The characteristics of webs were investigated by nuclear magnetic resonance, Fourier transform infrared spectroscopy, differential scanning calorimetry, and scanning electron microscope(SEM). The characteristic factors for forming of nanowebs were evaluated using the tables of orthogonal arrays and analysis of variance. According to the processing condition, SEM photographs showed that the webs consisted of fiber, fiber/bead, or bead. |
