明胶／蒙脱土纳米复合材料的插层机理

在均相溶液中制备了明胶 /蒙脱土纳米复合材料 ,并用 XRD,F TIR及 1 3 C NMR对复合产物进行了表征 ,探讨了插层机理 .研究结果表明 ,明胶分子能够插入蒙脱土层间形成插层或剥离结构的驱动力来自于明胶分子链上的 -NH 3和 -COO- 与蒙脱土强烈的相互作用 ,明胶分子可通过 -N H 3 与蒙脱土层间阳离子交换而插入层间 ,也可通过 -COO-与蒙脱土片层基团的配位作用而插入层间 .以月桂酸为模型阐述 -COO- 与蒙脱土的相互作用

STUDY ON INTERCALATION MECHANISM OF GELATIN/MMT NANOCOMPOSITE

A gelatin/MMT nanocomposite was prepared in an aqueous solution and investigated by XRD,FTIR and 13 C NMR,and then the intercalation mechanism was discussed.The result of XRD indicated that the gelatin molecule had already inserted into the interlayer of MMT,and the intercalation or exfoliation structure had been achieved.The result of 13 C NMR demonstrated that the ions interaction between gelatin and MMT was attributed to the driving force for intercalation.In order to confirm the role of -COO - of gelatin in the combination with MMT,lauric sodium was brought in as a model to react with MMT,and was characterized by XRD and FTIR,the result proved that there existed a kind of strong interaction between -COO - and ions of MMT.