| 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) through silane coupling reaction. Modification of SiNPs led to controlled wettability depending on the concentration of organosilanes. 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 morphology of coacervate membrane was observed via CLSM. From the interfacial rheology study, we found that the coacervate membrane exhibited mechanically enhanced modulus compared to single compositon. |
