Synthesis of L-lysine grafting nano-sized calcium carbonate particles
LIU Xiaohong
PAN Yifan
MAO Yanhong
Abstract：By adding L-lysine amino acid in nano-sized CaCO3 slurry,it could introduce active groups such as carboxyl and amino on the surface of nano-sized CaCO3 particles to realize the surface modification.The mechanism of modification was studied by FTIR,XRD,SEM and TGA.Results indicate that L-lysine acid is grafted onto the surface of nano-sized CaCO3 particles in the form of chemical.The modified nano-sized CaCO3 particles is good in dispersion and increases interplanar distance.The optimum process conditions of L-lysine amino acid grafting nano-sized CaCO3 particles are that the mass fraction of CaCO3 in slurry is 8％～10％,the mass ratio of L-lysine to nano-sized CaCO3 particles is 0.1,modification temperature is 70 ℃,time is 70 min.Under the optimized condition,the activation degree of modified nano-sizde CaCO3 is 46.3％.
Keywords：CaCO3 nano-particlessurface modificationL-lysine amino acidactivation degree
Publication Date：2016-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)