| 초록 |
Superporous hydrogels (SPHs) are a three-dimensional network of hydrophilic polymers that absorb water in a short time due to the presence of many pores with diameters on the micron to millimeter scale. In this research, SPHs were prepared by using radical polymerization of acrylic acid (AA) and acryloyoxystarch sulfate (ASS). The ASS was synthesized by two steps: First, maize starch was sulfated by chlorosulfonic acid adopting a sulfuric reaction with N, N-Dimethylformamide as a solvent and pyridine as a acid acceptor. Second, the water-soluble starch sulfate was linked with C=C bonds by using acryloyl chloride (AC) as a double bonds supplier. The FT-IR spectra showed the characteristic absorptions of sulfuric bonds and the degree of substitution (DS) was estimated by elemental analysis (C, H, S). The DS of double bonds was determined by 1H-NMR and 13C-NMR. The SPHs of ASS with fast swelling property can be completely degradated that could expand a large space for bio-applications. |
