| 초록 |
In this study, we present a water-in-oil (W/O) Pickering emulsion system stabilized by silica-cellulose nanofiber necklace (SiNL). For this, we deposited uniform silica nanoparticles on TEMPO-oxidized bacterial cellulose (TOBC) via the sol-gel method and then grafted alkylsilane to give appropriate hydrophobicity. The wettability of SiNLs was controlled by changing alkyl chain length and concentration of alkylsilane. From interfacial rheological analysis, we found that the longer alkyl chain grafted SiNLs effectively assembled to form a fibrillary solid layer at the interface. Moreover, SiNLs showed a significant increase in attachment energy, thus enhancing the interfacial modulus compared to silica nanospheres. These results highlight that the SiNLs simultaneously possess the interfacial adhesion resulting from the fiber structure and the rigid film properties resulting from the nanosilica materials, which greatly contributes to the improvement of the emulsion structure stability. |
