Alginate - a sheet-like hybrid zif-8 Preparation and Application of Composite Films

The present invention relates to an alginate - a sheet-like ZIF-8 composite films, belonging to the field of membrane separation. First, Zn (NO3) 2 and 2-methylimidazole as starting material, by controlling synthesis conditions, an aqueous phase was prepared a sheet-like ZIF-8. Then, the sheet-like ZIF-8 produced dispersed into an aqueous solution of sodium alginate prepared casting solution, after standing defoaming, spin coated onto the surface of the porous polymer membrane, immersed in a calcium chloride solution and dried cross joint, dry alginate obtained again - a sheet-like ZIF-8 composite films, the composite film of the present invention, the hybrid may be used to penetrate the ethanol / water pervaporation dehydration system. Using a two-dimensional sheet-like structure of ZIF-8 and a porous structure, strengthening the role of screening the hybrid molecules of the transfer film, thereby improving the separation performance of composite films. The present invention is simple preparation process, raw materials, a controllable structure, easy to scale preparation and amplification, has good application prospect.