| Surface modification of precipitated calcium carbonate with cationic styrene/acrylate was carried out. The surface structure and performance of modified precipitated calcium carbonate were characterized by DSC, FT-IR, Zeta potential, laser particle analyzer, sedimentation volume and contact angle and compared with unmodified precipitated calcium carbonate. According to the results of DSC and the spectra of FT-IR, the physical adsorption between surface modifiers and precipitated calcium carbonate took place. It was found that particle size of modified sample was smaller than unmodified one, sedimentation volume was larger and Zeta potential was higher. The results showed that the modified precipitated calcium carbonate is beneficial to improve physical properties, retention rate and hydrophobic ability of the paper when it is used as filler. |
