| 초록 |
Functional hydrogels based on dopamine-modified polyaspartate (DOP-PASP) were prepared and the swelling property in various ion-containing aqueous solutions was investigated. The catechol group of dopamine is well known to exhibit unique adhesive characteristics to a variety of organic/inorganic surfaces and also metal-ion binding ability. The swelling degrees of hydrogels were variable depending on the preparation conditions such as polymer concentration and crosslinker level, though, the high swelling degree up to 450 g/g was observed in pure water. From the swelling measurement, the decreasing tendency in swelling degrees was observed as the ion concentration or the valency of ions increased; i.e. the swelling has decreased to a large extent in order of Na+1 ＜ Ca+2 ＜ Fe+3, due to different metal ion-binding ability of carboxylate and catechol groups. DOP-PASP gel has great potential for use as adhesive hydrogel and metal-ion adsorbent in waste water treatment. |
