Process development and synthesis of nanoclay and nano calcite synthesis and their applications in surface coating industry

摘要

An overview of process development and synthesis of nano calcite crystal and nanoclay is presented.Synthesis of nano CaCO3 (nano calcite) was carried out using sonochemical carbonization.CO2 gas was used for carbonization of Ca(OH)2 XRD gram shows that the nano CaCO3obtained under sonication process gives the particle size of 35 to 50 nm.Natural Clay can be modified using quaternary salts.Due to incorporation of the intercalating agents the d spacing increases.Little amount of nanoclay can alter the entire properties of paints and inks.Rheological modifiers control the flow properties of liquid polymer systems such as paints,inks,emulsions which leads to thixotropic behavior.