ABSTRACT
The ultrasound-assisted method has been proved to be useful to obtain inorganic nanoparticles with narrow distribution. Ultrasound is the cyclic sound wave whose frequency is above the limit of human hearing, which is usually taken to be above 20 kHz. S. R. Shirsath et al. study the influence of ultrasound on the phase composition, structure, and performance of pure and doped TiO2 nano-catalysts. The mechanism of the formation of polymethyl methacrylate (PMMA)/Calcium carbonate (CaCO3) nanocomposite by ultrasound-assisted in situ emulsion polymerization. Functionalized CaCO3 were also encapsulated in the PMMA due to the good compatibility between the nanofillers and the polymer matrix. X., C. Chen et al have carried out the synthesis of PMMA-coated CaCO3 for the application of interfacial adhesion and mechanical properties of PMMA-coated CaCO3 nanoparticle-reinforced poly(vinyl chloride) (PVC) composites. X. Xie et al. have synthesized PVC/CaCO3 nanocomposite by in situ polymerization of vinyl chloride in the presence of CaCO3 nanoparticles.
