One-pot synthesis of sub-50 nm vinyl- and acrylate-modified silica nanoparticles

In this work, silica nanoparticles (SNPs), vinyl and acrylate modified SNPs were synthesized by a novel one-pot synthesis method using TEOS and the appropriate organosilanes as the modifier molecules including vinyltrimethoxysilane (VTMS) and 3-(methacryloyloxy) propyltrimethoxysilane (MPS). Although, spherical SNPs with average diameter ranging from 50 to 700 nm were synthesized, the reaction conditions were tuned to obtain the final modified silica nanoparticles with diameter smaller than 50 nm. Various experimental conditions including solvent, ammonia concentration, reaction time and temperature were optimized. Particles were characterized using FTIR, TGA, SEM, TEM and water contact angle. It was found that the modifier silane, when used in one-pot method, can reduce the size of the silica nanoparticles due to the non-hydrolysable substitution in its chemical structure compared to TEOS. The one-pot method is a shortcut and versatile method for synchronized synthesis and modification of a wide range of customized silica nanoparticles using different modifier silanes.

Here the method has been developed to obtain modified silica nanoparticles having sub-50 micron diameters via a one-pot method. Variety of the modified silica nanoparticles can be obtained adoptable in a wide range of applications from fillers to surface post grafting purposes.Figure optionsDownload as PowerPoint slideHighlights
► One-pot method synthesis and modifies the silica nanoparticles at the same time.
► The particles are sub-50 nm.
► The modifier silane reduces the size of the modified silica particles.
► Grafting-ready particles, drug delivery systems, photonic devices, and reactive fillers are among the possible applications.