| 초록 |
In the present study, we prepared transparent organosilicate films with thermally insulating and UV-blocking properties based on silica/titania hybrid hollow shells (SiO2/TiO2 HHSs). The hollow silica shells (HSSs) were first prepared using poly(acrylic acid) (PAA) colloidal aggregates as templates, tetraethyl orthosilicate (TEOS) as silica precursors, and ammonia hydroxide as a catalyst based on the modified Stöber method. TiO2 shells were then coated on the surfaces of HSSs employing titanium tetrabutoxide as titania precursors. The PAA@SiO2/TiO2 core@multi-shell colloidal nanoparticles prepared were washed with distilled water to remove the PAA templates, leaving behind SiO2/TiO2 HHSs. The SiO2/TiO2 HHSs mixed with organosilicate matrices were coated on glass substrates to realize thermally insulating and UV-blocking layers. The SiO2/TiO2 HHS-coated glasses show excellent heat- and UV-blocking properties, yet maintaining high transparency. |
