▎ 摘　　要

NOVELTY - Polyamide composite film comprises supporting layer, modified layer and polyamide layer. The modified layer is grown on the supporting layer. The polyamide layer is grown on the modified layer. The raw material component of the polyamide layer comprises polyamine, poly-acyl chloride and hollow poly-dopamine micro-sphere. The diameter of the hollow poly-dopamine microsphere is 50-200 nm. The modified layer is used for adjusting the thickness and cross-linking degree of the polyamide layer. USE - Used as polyamide composite film. ADVANTAGE - The composite film: maintains high rejection rate; increases the water flux; and improves the permeation efficiency. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing the polyamide composite film.