聚氧乙烯-粘土-碱金属离子插层复合物作用机理研究  

Interaction Mechanism Study on Poly(ethylene oxide)-Clay-Alkali Metal Ion Intercalation Composites

作　　者：孙明波[1] 侯万国[1] 孙德军[1] 戴肖南[1] 

机构地区：[1]山东大学胶体与界面化学教育部重点实验室

出　　处：《化学学报》2005年第7期562-566,F005,共6页Acta Chimica Sinica

摘　　要：测量了聚氧乙烯(PEO)-粘土-K+/Na+插层复合物在不同相对湿度环境中的相对吸水量,研究了相对吸水量与粘土层间距d001之间的关系,并结合X射线光电子能谱的研究结果,探讨了复合物中PEO、粘土与碱金属离子三者之间的相互作用.在K-MMT-PEO复合物中,K+与PEO和粘土表面都存在配合作用,形成稳定的三元配合物,在不同相对湿度下,K-MMT-PEO配合物吸水能力较低,层间距基本不变.在Na-MMT-PEO复合物中,Na+与PEO形成配合物,水分子能破坏Na+-PEO之间的配合作用,使PEO和Na+各自形成水化层,因此随着相对湿度的增加Na-MMT-PEO复合物的相对吸水量和层间距都增大.In this paper, the water content of poly(ethylene oxide)-clay-alkali metal ion intercalation composites in different relative humidity was measured, and the relationship between water content and interlayer space was studied. Combined with the X-ray photoelectron spectroscopy results, the interactions of poly(ethylene oxide) (PEO), clay MMT and alkali metal ions in the composites were discussed. In the K-MMT-PEO composites, K(+)was coordinated with MMT and PEO to form stable complex, and under the conditions of different relative humidity, the water contents of the K-MMT-PEO composites were low and the interlayer space kept nearly constant. In the Na-MMT-PEO composites, Na+ was coordinated with PEO only, water molecules could destroy this complex, and under the conditions of different relative humidity, the water contents of the Na-MMT-PEO composites were high and the interlayer space was increased with water contents.

关 键 词：插层复合物 碱金属离子 聚氧乙烯 粘土 机理研究 K^+/Na^+ X射线光电子能谱 相对湿度 配合作用 三元配合物 吸水量 层间距 PEO 研究结果 相互作用 吸水能力 分子能 自形成 表面 

分 类 号：TB332[一般工业技术—材料科学与工程]