▎ 摘　　要

NOVELTY - Use of polyurea/carboxylic acid (PGA) composite film obtained based on interface super-assembly strategy in ion sieving, is claimed for selectively transmitting monovalent cation, where the propyleneglycol alginate composite film is prepared by the polyurea/carboxylation oxide graphene alumina composite film based on the interface super-assembly strategy. USE - Polyurea/carboxylic acid composite film obtained based on interface super-assembly strategy in ion sieving for selectively transmitting monovalent cation (claimed). ADVANTAGE - The polyurea/carboxylation graphene oxide heterojunction film exhibits enhanced water stability, compared with the divalent metal cation capable of preferentially selectively transmitting a monovalent cation, exhibits a higher potassium ion or sodium ion current, and has potential application value in the field of ion screening. The modification of the PU layer endows the composite film with very good stability in the water, which has great potential in the application of water. The two-dimensional layered film material has an Egyptian size of nano-channel and negative charge. DESCRIPTION OF DRAWING(S) - The drawing shows a diagram showing the stability of the ion transmission of the PGA composite film. (Drawing includes non-English language text).