화학공학소재연구정보센터
Advanced Materials, Vol.19, No.10, 1331-1331, 2007
Membrane densification of heated polyelectrolyte multilayer capsules characterized by soft X-ray microscopy
Soft X-Ray microscopy is used for the sensitive hollow polyelectrolyte microcapsules made of poly(sodium styrene sulfonate) and poly(diallyl dimethyl ammonium chloride) (see figure). Upon heating to 90 degrees C they shrink and the polymer membrane becomes denser. The analysis of such systems in water shows, at 20 nm resolution, that membrane densification is accompanied by exclusion of about 50% of the hydration water, leading to homogeneously filled dense spheres without any loss of material.