다층박막적층법을 이용한 껍질 기능성 콜로이드 마이크로입자 제조에 관한 연구

Abstract

This paper introduces a practical and straightforward method for the fabrication of hydrogel microparticles layered with a mechanically robust polyelectrolyte/silica hybrid thin shell. Monodisperse hydrogel microparticles with a negative surface charge were fabricated using a versatile microfluidic technique and subsequent photo-polymerization. The microparticles were coated with polyelectrolyte layers by layer-by-layer deposition. A thin silica layer was generated on the surface by the reduction of silicate on the polyelectrolyte layer. We experimentally demonstrated that the polyelectrolyte/silica layer on the hydrogel microparticles was mechanically robust, even under osmotically pressurized conditions and displayed excellent shell impermeability.|A new platform technology for the fabrication of highly sensitive colloidal pressure sensors is developed. For this, monodisperse, oil-in-water emulsion drops containing polyurethane precursors are generated using the microfluidic approach and photo-polymerization to produce uniform polyurethane microparticles. Subsequent layer-by-layer deposition of carbon nanotubes successfully imparts controllable conductance to the particles. Finally, we experimentally demonstrate that these conducting elastomer microparticles indeed play an essential role in detecting pressure changes with excellent sensitivity and repeatability.; A new platform technology for the fabrication of highly sensitive colloidal pressure sensors is developed. For this, monodisperse, oil-in-water emulsion drops containing polyurethane precursors are generated using the microfluidic approach and photo-polymerization to produce uniform polyurethane microparticles. Subsequent layer-by-layer deposition of carbon nanotubes successfully imparts controllable conductance to the particles. Finally, we experimentally demonstrate that these conducting elastomer microparticles indeed play an essential role in detecting pressure changes with excellent sensitivity and repeatability.