一种具有识别运输钠离子的离子通道膜的制备

以三氯甲烷为溶剂,用3-异氰酸基丙基三乙氧基硅烷和对氨基苯酚合成得到一种自组装杂化材料——3-(脲基酚基)丙基三乙氧基硅烷.采用FTIR、XPRD分析方法对该化合物的结构以及晶体形态进行了表征.利用旋涂法和共混法分别制备离子通道膜,采用ATR-FTIR和SEM分析手段表征膜的化学结构和形态结构,并通过自制的膜运输实验装置测定膜的传输性能并提出了相应的传输机理.实验结果表明,两种方式所得的离子通道膜表面是致密无孔的,致密层厚度为8～10μm左右;采用共混法制得的离子通道膜的传输速度较旋涂法快.离子通道是杂化材料通过分子自组装形成的,该通道可以识别并运输Na+.

PREPARATION OF ION CHANNEL MEMBRANES FOR RECOGNIZING AND TRANSPORTING SODIUM

A kind of self-organized hybrid material—3-(ureidophenol)propyltriethoxysilane was obtained from 3-isocyanatopropyltriethoxysilane and aminophenol with chloroform as solvent.The structure and the morphology of the materials were characterized by FTIR,DSC,and XRD methods.The ion channel membrane was obtained by two ways,one of them is to prepare membranes by coating the sol onto commercial ultrafiltration planar polyacrylonitrile supports,and the second is to prepare blend membranes by casting on glass sheets the solution of the hybrid material and polyacrylonitrile(PAN).The chemical structure and surface morphology of the membranes were characterized by ATR-FTIR and SEM separately.The ion transport property of the membrane was tested by our self-made device.The results showed that the surface of ion channel membranes was dense and the dense layer was about 8 ～ 10 μm thick for membranes prepared by both methods.There is obvious difference in the transport rate of ions for the two kinds of membranes.The transport rate of the membrane made by blending method is lower than that by coating method.The transport mechanism of these ion channel membranes was explained by molecular self-organization through the hydrogen bonding action.What's more,the ion channel membranes possess the function of recognizing and transporting sodium ions.