硬脂酸改性纳米碳酸钙表面研究  

Study on Surface Modification of Nano-meter Calcium Carbonate With Stearic Acid

作　　者：马梦绮 武志鹏 胡跃鑫[1] 韩向艳 MA Meng-qi;WU Zhi-peng;HU Yue-xin;HAN Xiang-yan(LiaoNing Petrochemical University,Fushun Liaoning 113001,China)

机构地区：[1]辽宁石油化工大学,辽宁抚顺113001

出　　处：《当代化工》2024年第3期582-586,共5页Contemporary Chemical Industry

基　　金：辽宁省教育厅科学研究一般项目(项目编号:L2020006)。

摘　　要：为了改善纳米碳酸钙(nano-CaCO_(3))在基体中的分散情况,采用硬脂酸对nano-CaCO_(3)表面进行改性,通过改变硬脂酸用量、反应温度、反应时间、浆料质量浓度,测定反应前后nano-Ca CO_(3)的活化度和吸油值,进而确定最佳反应条件。结果表明:硬脂酸可以改性nano-Ca CO_(3),其最好的改性条件为硬脂酸质量分数4%,浆料质量浓度90g·L^(-1),反应温度为60~80℃,反应时间为50~60min。红外光谱显示硬脂酸与nano-CaCO_(3)之间形成了牢固的化学键,扫描电镜观察到用硬脂酸处理过的nano-CaCO_(3)可减少在基体中团聚,有助于其在基体中分散。In order to improve the dispersion of nano-CaCO_(3)in matrix,the surface of nano-CaCO_(3)was modified by stearic acid.The activation degree and oil absorption value of modified nano-CaCO_(3)were determined by changing the amount of stearic acid,reaction temperature and reaction time,slurry mass concentration.Then the best modification conditions were determined.The experimental results showed that nano-CaCO_(3)could be modified by stearic acid,and the best experimental modification conditions were as follows:stearic acid mass fraction 4%,slurry mass concentration 90g·L^(-1),modification temperature 60~80℃,modification time 50~60 min.The fourier transform infrared spectroscopy showed that stearic acid formed a strong chemical bond with nano-CaCO_(3),and scanning electron microscopy observed that the modified nano-CaCO_(3)could reduce the aggregation and contribute to its dispersion in the matrix.

关 键 词：纳米碳酸钙 硬脂酸 分散 吸油值 

分 类 号：TQ050.420[化学工程]