Emulsion templating of poly (acrylic acid) by ammonium hydroxide/sodium hydroxide aqueous mixture for high-dispersed hollow silica nanoparticles
作者： Chika Takai-Yamashita , Masafumi Ando , Masashi Noritake , Hadi Razavi Khosroshahi , Masayoshi Fuji
DOI: 10.1016/J.APT.2016.10.010
关键词: Sodium hydroxide 、 Ammonium hydroxide 、 Catalysis 、 Small-angle X-ray scattering 、 Thermogravimetric analysis 、 Aqueous solution 、 Nuclear chemistry 、 Inorganic chemistry 、 Materials science 、 Emulsion 、 Acrylic acid
摘要: Abstract A water-in-oil (W/O) emulsion, in which the water phase including poly (acrylic acid) (PAA), ammonium hydroxide (NH 3 aq.), and sodium aqueous solutions (NaOH aq.) dispersed ethanol (EtOH), was proposed for producing hollow silica nanoparticles. The PAA molecules with NH -NaOH mixture are insoluble EtOH can be a template. When tetraethoxysilane (TEOS) is added as source, shell formed on PAA-NH template to form core-shell particle addition of removes optimum volume ratio 25% :1.0 M NaOH 2:1 obtain high-dispersed thermogravimetric analysis indicated that condensation force similar small angle X-ray scattering (SAXS) also showed electron densities templates similar. In system, aq. mainly contributes by an ionic interaction preferentially work sol-gel catalyst fast coating surface.
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