Preparation method and application of molecular sieve/organic composite infiltration, vaporization and separation membrane

The invention belongs to the technical field of separation membranes, and relates to a preparation method and application of a molecular sieve/organic composite infiltration, vaporization and separation membrane. The preparation method comprises the following steps of: firstly adopting a hydrothermal method to prepare nano-level molecular sieve; putting the synthesized nano-level molecular sieve in a solvent, and dispersing the molecular sieve into uniform molecular sieve suspending liquid through ultrasound, wherein the mass fraction of the molecular sieve in the suspending liquid is 5-15%; uniformly coating the molecular sieve suspending liquid on an organic supporting body; drying the organic supporting body at the temperature of 20-60 DEG C to form a molecular sieve membrane; and repeating the coating for 2-4 times. Surface modification is performed on the organic supporting body by adopting methods such as plasma induction, silane coating and the like to modify the surface hydrophily. The method can be u