摘要
采用3种偶联剂分别对碳酸钙进行表面改性,分析改性碳酸钙活化指数的影响因素,通过SEM分析和沉降体积的测试,评定3种偶联剂的改性效果。结果表明,钛酸酯偶联剂KH101改性碳酸钙最佳反应条件为,反应温度80℃,反应时间70min,m(偶联剂)∶m(碳酸钙)为0.03,环己酮用量为碳酸钙的5倍;硅烷偶联剂KH570、KH151改性碳酸钙最佳反应条件为,反应温度70℃,反应时间70min,m(偶联剂)∶m(碳酸钙)为0.03,环己酮用量为碳酸钙的5倍。用KH151、KH570两种硅烷偶联剂改性后的碳酸钙团聚现象仍比较严重,用KH101钛酸酯偶联剂改性后的碳酸钙团聚现象得到明显改善。
KH101,KH151 and KH570 were used to modify the surface of CaCO3,respectively,to improve the surface properties,and the optimum modification conditions were determined by analyzing the factors that influenced the activation grade of modified CaCO3.The modification effects of three coupling agents were compared by means of SEM analysis and settling volume test.The results show that,the optimum conditions for KH101 modification of CaCO3 are the reaction temperature at 80 ℃,the reaction time at 70 min,the coupling agent content at 3%,and the amount of cyclohexanone five times that of CaCO3,and the optimum conditions for KH570 and KH151 modification of CaCO3 are the reaction temperature at 70 ℃,the reaction time at 70 min,the coupling agent content at 3%,and the amount of cyclohexanone five times that of CaCO3.It is also found that modification with KH151 and KH570 is characterized by severe reunion phenomenon,while modification with KH101 can remarkably ameliorate the reunion phenomenon of CaCO3.
出处
《武汉科技大学学报》
CAS
2013年第1期64-68,共5页
Journal of Wuhan University of Science and Technology
关键词
碳酸钙
硅烷偶联剂
钛酸酯偶联剂
改性
CaCO3
silane coupling agent
titanate coupling agent
modification
