Yuang Paul-Cheng, Shen Yun-Hwei
Department of Resources Engineering, National Cheng Kung University, Tainan, Taiwan 70101, Republic of China.
J Colloid Interface Sci. 2005 May 15;285(2):443-7. doi: 10.1016/j.jcis.2004.12.056.
This study investigates the feasibility of using ethylene oxide (EO) chain adsorption to determine the surface area of smectite in water. Experimental results indicate that high-molecular-weight poly(ethylene oxide) (PEO) should be used to provide reasonable estimations for monolayer capacity of PEO on smectite. The surface areas of smectites in water are calculated from the monolayer capacity of PEO adsorbed on smectite by taking the area per EO unit as 8.05 A(2). The method measures the actual surface area of smectite exposed when dispersed in water, which is important to applications of smectite under aqueous conditions.
本研究考察了利用环氧乙烷（EO）链吸附法测定蒙脱石在水中的表面积的可行性。实验结果表明，应使用高分子量的聚环氧乙烷（PEO）来合理估算PEO在蒙脱石上的单层吸附容量。通过将每个EO单元的面积设定为8.05 Ų，根据吸附在蒙脱石上的PEO的单层吸附容量计算出蒙脱石在水中的表面积。该方法测量的是蒙脱石在分散于水中时暴露的实际表面积，这对于蒙脱石在水性条件下的应用具有重要意义。
