A straightforward procedure for the synthesis of [email protected] core-shell nanoparticles
-
Add time:08/02/2019 Source:sciencedirect.com
The synthesis of core-shell [email protected] nanoparticles is of interest for many applications including electrorheology and inkjet printing. Formation of such structures by simple adsorption of aniline onto silica surfaces followed by polymerization is rather difficult. Chemical grafting of alkoxysilane monomers on silica surfaces followed by polymerization has been used to prepare [email protected] microspheres but has never been applied to silica nanoparticles. Here, we report an efficient method to prepare [email protected] nanoparticles of different sizes. This study goes far beyond the simple synthetic procedure. It also evidences a general law that can be applied by all to anticipate the efficient encapsulation of silica nanoparticles by polyaniline. Here, silica nanoparticles of different sizes (90–300 nm) were firstly synthesized by Stöber process and then functionalized with N-[3-(Trimethoxysilyl)propyl]aniline. The last step implied the room temperature polymerization of aniline in the presence of these functionalized-silica nanoparticles using ammonium persulfate as oxidant. Several sets of particles were prepared using different amounts of aniline monomers resulting in different polyaniline thicknesses. SEM, TEM, IR, TGA and XPS were then used to characterize thoroughly these core-shell particles.The highlight of this paper is that efficient encapsulation of silica particles by polyaniline occurred if, and only if, the ratio between the polyaniline thickness and the particle diameter was close to 10%. Higher ratio led to the presence of isolated polyaniline granules while lower ratio resulted in uncompleted encapsulation.
We also recommend Trading Suppliers and Manufacturers of SILICA (cas 10279-57-9). Pls Click Website Link as below: cas 10279-57-9 suppliers
Prev:Sintered SILICA (cas 10279-57-9) bodies with persistent luminescence
Next:Colloidal stability of SILICA (cas 10279-57-9) and graphite in aqueous suspensions) - 【Back】【Close 】【Print】【Add to favorite 】
- Related Information
- Synthesis and anisotropic properties of alumina-SILICA (cas 10279-57-9) aerogels constructed by SILICA (cas 10279-57-9) sols infiltrated into unidirectional frozen alumina templates08/04/2019
- Colloidal stability of SILICA (cas 10279-57-9) and graphite in aqueous suspensions08/03/2019
- Sintered SILICA (cas 10279-57-9) bodies with persistent luminescence08/01/2019
- Polysilsesquioxane-based SILICA (cas 10279-57-9) aerogel monoliths with embedded CNTs07/31/2019
- Removal of arsenic and SILICA (cas 10279-57-9) from geothermal fluid by electrocoagulation07/30/2019
- Growing invisible SILICA (cas 10279-57-9) nanowires on fused SILICA (cas 10279-57-9) plates provides highly transparent and superwetting substrates07/29/2019
- Dependence of mesoporous SILICA (cas 10279-57-9) properties on its template07/28/2019
- Fume SILICA (cas 10279-57-9) improves the insulating and mechanical performance of SILICA (cas 10279-57-9) aerogel/glass fiber composite07/27/2019
- [email protected] catalyst: Porosity of SILICA (cas 10279-57-9) shells switches catalytic reactions07/26/2019
-
Health and Chemical more >
-
Related Products