| 초록 |
Cyclodextrins (CDs) are cyclic oligosaccharides containing 6~8 glucose unit, which can be obtained from starch by mean of enzymatic conversion, and have been used for food, pharmaceutical, drug delivery. Cyclodextrins have one primary hydroxyl group and two secondary hydroxyl groups per each glucose unit, which can be used as chemical modification sites for various applications. In this study, β-cyclodextrin was modified to have various functionalities such as vinyl and sulfonic acid or carboxylic acid groups. FT-IR, ¹H NMR, ¹³C NMR and MALDI-TOF were used for the characterization of the modified β-cylodextrin. Glass ionomer-cements (GICs) ware prepared by photopolymerizing the modified β-cylodextrin with conventional Fuji II LC glass, composed of powder and liquid products, with various ratios. Experimental GICs were formulated by changing liquid ratio and P/L ratio to find optimal mechanical strength. Finally, experimental GICs formulated by cyclodextrin derivatives with vinyl group and carboxylic acid showed highest mechanical strengths such as compressive strength (CS), diamatral tensile strength (DTS) as well as better shrinkages and viscosities. |
