Synthesis of worm-like superparamagnetic P(St-AA)@Fe3O4/SiO2 Janus composite particles

摘要

Novel Janus nanocomposite particles with superparamagnetic P(St-AA)@Fe3O4 seed microspheres as head and worm-like SiO2 as body were successfully prepared. The effects of different variables such as the amount of cetyltrimethyl ammonium bromide (CTAB), tetraethyl orthosilicate (TEOS), and ammonia and the composition of inorganic precursors and surfactants on the morphologies of final particles were studied by transmission electron microscopy (TEM) and field-emission scanning electron microscopy (SEM). Due to the amphophilic difference between the two parts as well as their special morphologies, the fabricated worm-like particles could be applied to stabilize oil/water mixtures even if owing relative hydrophilic properties that might provide a new category of functional solid surfactants in Pickering emulsions and the fabrication of hierarchical materials.