中文摘要：

本文以介孔分子筛MCM-41为研究对象,通过合成与后改性法,调控其孔径、表面性质以及平衡阳离子种类。通过X射线衍射、液氮吸附对介孔材料结构进行结构分析,采用动态水分吸附仪研究其水分吸附特性,并结合吸附等温线热力学模型进行分析。研究结果表明：铝嫁接有效提高MCM-41在低湿度下吸附量,并且随着嫁接浓度的增大而增加;通过阳离子置换强化了低湿度环境下MCM-41的吸附量,不同阳离子置换后的强化效果：Mg~（2＋）＋〉Li~＋〉Na~＋。热力学模型分析表明阳离子置换后的吸附剂表面均一,且具有较好的亲水性。

英文摘要：

The pore size, surface property and cation of MCM-41 were controlled by synthesis and post modification. MCM-41 and A1-MCM-41 are characterized by XRD, N2 adsorption-desorption, and dynamic water vapor sorption analyzer. Results show that A1 grafted MCM-41 have higher water sorption capacity in low relative humidity （RH）, which increase with the grafted A1 amount. Cations strengthen the water sorption capacity in low RH followed the order by Mg2＋ 〉Li＋ 〉Na＋. Thermodynamics analysis combined with isotherm model fitting shows that cation exchanged MCM-41 have homogeneous surface properties and show high affinity to water.