不锈钢基体上ZSM-5分子筛膜的制备及影响因素分析

The synthesis of ZSM-5 zeolite membrane on the surface of stainless steel wire mesh and its impacting parameters

采用阳极氧化技术对不锈钢丝网表面进行修饰,成功制备了ZSM-5分子筛膜.通过XRD、SEM等技术对合成的材料进行表征,并考察了电解液种类、晶化时间、晶化温度以及合成次数等参数对分子筛膜的影响.结果表明,经阳极氧化工艺处理后,不锈钢丝网表面出现了明显的孔径结构,并生成了一层致密的阳极氧化膜.这些孔道结构和阳极氧化膜有利于ZSM-5分子筛膜的生长,是成功合成高结合力分子筛膜的关键.各制备参数对分子筛膜的结构形成亦产生了较大的影响.

A novel continuous ZSM-5zeolite membrane was successfully prepared on the surface of stainless steel wire mesh by the method of hydrothermal synthesis.In order to enhance the soundness of ZSM-5zeolite membrane on the substrate,the anodic oxidation technology was applied to modify the surface properties of stainless steel wire mesh.The ZSM-5zeolite membrane was characterized by the technologies of XRD and SEM to study the effect of preparation parameters on its properties.The influences of different preparation parameters including different types of electrolyte,hydrothermal synthesis time and temperature were investigated.Results show that the surface property of the stainless steel wire mesh is improved via the anodic oxidation pretreatment technology.After the pretreatment by the anodic oxidation technique,obvious porous structure is appeared on the surface of the substrate,which is favorable for the growth of ZSM-5zeolite membrane on the stainless steel wire mesh.At the same time,the preparation parameters can tremendously affect the formation of ZSM-5/SSWM zeolite membrane.