Polyvinyl acetate/polyion liquid semi-interpenetrating polymer network film and photocuring preparation method thereof

Abstract

The invention belongs to the field of preparation of gas separation films, and particularly relates to a polyvinyl acetate / polyion liquid semi-interpenetrating polymer network film and a photocuring preparation method thereof. The preparation method comprises the following steps: 1) preparing a film preparation solution, namely uniformly mixing polyvinyl acetate, a solvent and an ionic liquid monomer at 50 DEG C to form the film preparation solution; 2) crosslinking to form an interpenetrating network polymer film: adding a crosslinking agent and a photoinitiator into the film preparation solution, carrying out ultrasonic treatment on the mixed film preparation solution, and curing in a photocuring machine until the film preparation solution is crosslinked into a film; and 3) after-treatment: drying the prepared film in air for 24 hours, transferring into a vacuum drying oven, and drying at 30 DEG C for 12 hours. The polymerizable ionic liquid monomer used as one component in the semi-interpenetrating polymer network film has the advantages of favorable compatibility with other components, high stability and low tendency to loss, and can ensure the physical structure and enduring and stable properties of the film.

Description

technical field

[0001] The invention belongs to the field of gas separation membrane preparation, in particular to a polyvinyl acetate / polyionic liquid semi-interpenetrating polymer network membrane and a photocuring preparation method thereof. Background technique

[0002] Over the past few decades, with the extensive use of fossil fuels, CO in the air 2 The sharp increase in the content of the compound has exacerbated the global greenhouse effect. Currently, it is used to separate CO from combustion exhaust 2 The methods and technologies are adsorption, absorption, cryogenic condensation and membrane separation. Membrane separation technology has become one of the most important technologies for researching CO due to its advantages of low energy consumption, small equipment scale, and easy combination with other technologies. 2 Separated hotspots. Polyvinyl acetate (PVAc) is a cheap and easy-to-obtain glassy polymer, because the molecular chain contains a polar carbony...