| 초록 |
This study introduces a novel nanoemulsion drop-attached Pickering emulsion system, in which the oil in water interface was stabilized by amphiphilically modified biocellulose nanofibrils (AMBCs). We first modified the surface of hydrophilic BCs to impart the hydrophobicity and to induce DNA interaction. For this, octadecylamine and amine terminated DNA were grafted onto fully-oxidized BCs that were treated with 1-ethyl-3-(3-dimethyl aminopropyl) carbodiimide and N-hydroxysuccinimide to form amide bonds. The AMBCs as emulsifier reduced the surface tension. This facilitated to fabricate a stable Pickering emulsion with improved viscosity. The interface adsorbed by the AMBCs was confirmed by fluorescence microscopy. Finally, we attached attractive nanoemulsion drops to the Pickering emulsion through hydrogen bonding interaction. The attractive nanoemulsion was functionalized by DNA sequence to interact with a pair of the DNA sequence in the water-phase of Pickering emulsion. |
