| 초록 |
We have been interested in the synthesis of hydrogels with fast swelling kinetics and superabsorbent properties. To increase the water absorption rate, interconnected pores were introduced to the hydrogels. Since the pore size in the dried hydrogels is in the order of hundreds of micrometers, there hydrogels are called "superporous" hydrogels. Superporous hydrogels were synthesized by crosslinking while forming gas bubbles by chemical reaction of acid and NaHCO3. The use of the NaHCO3/acid system allowed easy control of timing for gelation and foam formation. The ethanol-dehydrated superporous hydrogels reached equilibrium swelling within minutes. Preparation of porous carrier using the right blowing system, foam stabilizer and drying method makes it possible to reduce the swelling time to less than a minutes regardless of the size of the dried gels. The superporous hydrogels can be used where fast selling and superabsorbent properties are critical. |
