| 초록 |
9-fluorenylmethoxycarbonyl-modified phenylalanine (Fmoc-F) is a class of short aromatic amino acids featuring eminent supramolecular self-assembly, which has attracted much research interest as an effective hydrogelator. In this study, we prepared a hybrid of physically crosslinked Fmoc-F/chemically crosslinked polyacrylamide (Fmoc-F/PAAm) double-network (DN) hydrogel. Fmoc-F/PAAm DN hydrogels exhibited remarkably improved tensile properties compared to those of the pure PAAm hydrogel. Toughening mechanism of DN hydrogels is analyzed by FT-IR, SEM, and successive loading-unloading tests. Owing to the thermoreversible nature of Fmoc-F, the DN hydrogel also exhibited excellent temperature-responsive shape memory property. Furthermore, Fmoc-F hydrogels containing AAm monomers show syringe-injectable and self-healing properties even at room temperature, which suggests the newly developed hydrogel to be a promising candidate for the ink of a 3D printer to complex 3D structures. |
