| 초록 |
Hollow silica shells (HSSs) are attractive candidates as insulating materials due to their unique properties such as hollow inner space, porous shell structure, large surface area, low thermal & electrical conductivity, and high thermal stability. In the present study, we applied the basic principles of HSSs to thermally insulating glasses with high transparency. The HSSs were prepared using poly(acrylic acid) (PAA) colloidal aggregates as templates, tetraethyl orthosilicate (TEOS) as a silica precursor, and ammonium hydroxide as a catalyst based on the modified Stber method. The prepared PAA@silica core/shell nanoparticles were washed with distilled water to remove the PAA templates, leaving behind HSSs. The average diameter of HSSs could be controlled from 30 to 100 nm. The HSSs mixed with organosilicate matrices were deposited on glass substrates to realize thermally insulating layers. The HSS-coated glasses show improved heat-blocking capability with high transparency. |
