Polyvinylamine film with nano hydrophilic channel and preparation and application thereof

The invention discloses a polyvinylamine membrane with a nano hydrophilic channel and preparation and application of the polyvinylamine membrane, and belongs to the field of membrane separation. The preparation method comprises the following steps: hydrolyzing N-vinyl formamide through free radical polymerization to prepare polyvinylamine, reacting a small amount of amino in polyvinylamine with an acyl chloride compound with a hydrophobic comb-shaped side chain, coating a polyacrylonitrile ultrafiltration membrane with the obtained reaction product by using a solution coating method, and performing standing for micro-phase separation to obtain a pervaporation composite membrane. The preparation method has the advantages that: the preparation process is simple and convenient, the raw materials are easy to obtain, and the prepared polyvinylamine composite membrane containing the hydrophobic side chain is used for ethanol/water liquid separation and shows good flux and separation factors. 本发明公开了一种具有纳米亲水通道聚乙烯基胺膜及