| 초록 |
Recently, cellulose nanocrystalline (CNC) has received a lot of attention as the most abundant sustainable reinforcement to improve the mechanical properties of polymers. However, a perfect transfer of CNC’s rigidity to the polymer matrixes is limited by the poor dispersion in common hydrophobic medium because of the intrinsic hydrophilicity of CNC, originated from abundance of surface hydroxyl groups. Here, we prepared modified CNC by grafting small hydrophobic molecules onto the surface to increase interfacial adhesion with hydrophobic substrates. By confirming that the surface-modified CNC can exhibit excellent dispersibility in common organic solvents without losing their inherent fibril structures, they were incorporated into hydrophobic polyurethane films by solution casting. The optical and mechanical properties after the substitution were systematically examined, which exhibited a better performance compared to the composites with unmodified CNC. |
