| 초록 |
We introduce a novel interfacial structure which is engineered by in-situ coacervation of silica nanoplatelets (SiNPs) and polyacrylic acid (PAA). For this, we synthesized SiNPs by silicification in hexagonal platelet structured polypeptide templates. To give controlled wettability to SiNPs, we grafted 3-aminopropyltriethoxysilane (APTES) and hexyltrimethoxysilane (HTMS). Thanks to high adhesion energy of SiNPs, monodisperse macroemulsion drops could be produced in a capillary-based microfluidic device. The interfacial structure could be engineered by inducing the coacervation of amine-functionalized SiNPs and carboxylic acid groups of PAA. The bi-layered coacervate membrane was directly observed via CLSM analysis. From the interfacial rheology study, we found that this coacervate membrane exhibited mechanically enhanced modulus compared to single compositon. Moreover, flow state diagram showed that the structured liquids are generated via intefacial jamming at the interface. |
