| 초록 |
In this study, we present a water-in-oil (W/O) Pickering emulsion system stabilized by silica-cellulose nanofiber necklaces (SiNLs). For this, we deposited uniform silica nanoparticles on TEMPO-oxidized bacterial celluloses (TOBCs) via sol-gel method and grafted alkylsilane to give hydrophobicity. The wettability of SiNLs was controlled by alkyl chain length and concentration of alkylsilane. Especially, the structural stability of emulsion was affected by the alkyl chain length of SiNLs, indicating that longer chains of SiNLs effectively suppressed the coalescence of droplets. Moreover, the SiNLs-armored W/O interface shows a significant increase in interfacial modulus compared to silica nanospheres (SiSPs). From this, we observed that the SiNLs formed a fibrillary solid layer at the interface. These results highlight that the SiNLs have the synergistic effects of both interfibril interaction as nanofibers and stiff barrier as solid silica particles. |
