摘要
向纳米碳酸钙悬浮液中直接加入硬脂酸钠,制得改性纳米碳酸钙粉体,确定了改性剂硬脂酸钠的最佳用量为3 g／100 g CaCO3、最佳改性时间(20-30 min)、最佳改性温度(70-80℃)。用红外光谱、扫描电镜等分析手段进行了验证,实验表明,每100 g改性纳米碳酸钙的吸油值降至35．2 g,而活化度增至90．2％,大大提高了碳酸钙的活性。
The modified nano-CaCO3 was prepared by a new technology of adding sodium stearate into nano-CaCO3. The optimum dosage of the modifier is 3. 0 g/100 g CaCO3 ,modification time 20-30 min and modification temperature 70-80 ℃. The modified CaCO3 was investigated by means of FTI, SEM,etc. Experimental results show that the oil absorption value of modified nano-CaCO3 is 35. 2 g per 100 g and the activity of modified nano-CaCO3 is increased greatly to 90. 2%.
出处
《精细化工》
EI
CAS
CSCD
北大核心
2005年第z1期89-92,共4页
Fine Chemicals
关键词
纳米碳酸钙
表面改性
硬脂酸钠
nanometre calcium carbonate
surface modification
sodium stearate
