乙酰胺/蒙脱土吸附嵌入机理的研究  

Study adsorption and intercalation mechanism of acetamide on montmorillonite

作　　者：李晓冰[1] 刘宇光[1] 

机构地区：[1]黑龙江省科学院技术物理研究所,黑龙江哈尔滨150086

出　　处：《哈尔滨商业大学学报（自然科学版）》2003年第2期233-237,共5页Journal of Harbin University of Commerce：Natural Sciences Edition

基　　金：黑龙江省科学院基金项目 ( 0 1CFBALYG0 5 )

摘　　要：通过乙酰胺在蒙脱土层面间吸附嵌入研究 ,对乙酰胺与蒙脱土的作用形态予以表征 .认为乙酰胺在蒙脱土层间的吸附嵌入机理有两种形式 ,即 :乙酰胺首先在层面上被质子化后通过离子键合作用吸附嵌入到蒙脱土层面 ,吸附嵌入量较少 (仅为 3mg g) ,对应于乙酰胺分子的单分子层吸附 (化学吸附 ) ;而乙酰胺分子以氢键缔合作用形式吸附嵌入量较大 (为 1 8mg g左右 ) ,稳定性较差 ,易在溶剂淋洗或加热过程中脱除 (物理吸附 ) .Reports the investigation of the adsorption mechanism of acetamide on to clays, the organic molecules are protonated on the surface and adsorbed by ionic forces, the adsorption of amides take places both on the external surfaces of the particles and in the space between the interlayer. There is a linear relationship between the adsorption ratio and the polarizing power of the exchangeable cations of the clay mineral. The adsorption isotherms reveal the existence of two adsorption mechanisms: (1) a strong ,irreversible adsorption, which corresponds to the formation of a monolayer of chemisorbed molecules;(2) a more important adsorption of molecules retained by hydrogen combining, which can be eliminated by heating at low temperature.The adsorption ratio of irreversible process, which is practically identified for acetamide, only 3 mg/g ,and the ratio of reversible process is 18 mg/g respectively.

关 键 词：乙酰胺 蒙脱土 层间嵌入 吸附 

分 类 号：TQ314.2[化学工程—高聚物工业]