Synthesis of Hybrid Composite ofSiO۲ Nano particles-Diethyl Methylene Malonate Polymer

This research work delineates a strategy of developing microparticles with a hybrid configuration thatconstitutes an inorganic and an organic part. The inorganic part comprises ~۳۴ nm diameter silica gel(SiO۲), which are embedded within an organic polymer particle comprised of diethyl methylene malonatepolymer [p(DEMM)]. Anionic polymerization is modified to controllably incorporate SiO۲ nanoparticles intothe polymer matrix. A design of experiments was identified and carried out to identify the major processvariables that influence the final particle size. In particular, since DEMM polymerization may be initiatedentirely by the presence of hydroxyl anions, pH was found to control the final overall particle diameterbetween ۳۳۳ nm and ۱ micrometer. The overall inorganic particle loading can be readily modified.Scanning electron microscopy reveals that the colloidal stability of the hybrid microparticles is dependent onthe ligand coating the inorganic constituent. In order to show the methods versatility method to producecomposite particles for a wide spectrum of applications. These initial investigations provide the syntheticgroundwork to evaluating the coating properties of the microparticles and their self-assembly into novelmaterials in the future

Keywords:

Silica gel nanoparticles , Diethyl methylene malonate polymer , Hybrid composite , Anionicpolymerzation