阳离子苯乙烯-丙烯酸酯对沉淀碳酸钙表面改性的研究

Surface Structure and Application of Precipitated Calcium Carbonate Modified with Cationic styrene/acrylate

采用阳离子苯乙烯-丙烯酸酯乳液对沉淀碳酸钙进行改性,使用DSC、FT-IR、Zeta电位、激光粒度仪、沉降体积、接触角等对改性沉淀碳酸钙的表面结构及其性能进行表征,并与未改性沉淀碳酸钙进行对比分析。DSC和FT-IR分析表明,阳离子苯乙烯-丙烯酸酯乳液包覆在沉淀碳酸钙表面,影响其表面性质。研究结果说明,改性后沉淀碳酸钙的粒径变小、沉降体积增大、Zeta电位提高。以改性沉淀碳酸钙作为造纸填料,与添加未改性沉淀碳酸钙的相比,纸张的物理性能和憎水性能得到改善,纸张灰分含量提高。

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.