Preparation of chitosan charged microporous filtering film by dip-coating method

The charged microporous filter membrane uses common microporous filter membrane as base, uses the chitosan as charging agent and is made by passing through such processes of dip-coating, cross-linking, water-washing and drying to prepare the positively charged microporous filter membrane, it can obviously raise its electric properties, and is less influenced by electrolyte. The application technology of said method is simple, nd has no specific requirement for environmetal condition.