| 초록 |
Hydrogels are multi-functional materials having large amount of water and three-dimensional hydrophilic polymer networks. We used the TEMPO-treated cellulose nanofibrils (TEMPO-CNF), a kind of hydrogels, and metal salts such as (Fe(NO3)3, Al(NO3)3, Cu(NO3)2, Ca(NO3)2, Zn(NO3)2) solutions to induce metal-carboxylate coordination bonding, which could improve the mechanical strength of TEMPO-CNF. We confirmed the formation and behavior of M-TCNF. The behavior of M-TCNF analyze through the large amplitude oscillatory shear (LAOS) test and sequence of physical processes (SPP) analysis. These two methods can even know the nonlinear deformation behavior of the material. As a result, we could confirm that the stiffness and strength of the M-TCNF was significantly increased compared to TEMPO-CNF, and that different structural deformation occur according to the number of cations. |
