Mixed matrix membrane with heat resistance and solvent resistance and preparation method and application thereof

Abstract

The invention relates to a mixed matrix membrane with heat resistance and solvent resistance and a preparation method and an application thereof and belongs to the field of membrane separation technologies and novel materials. The preparation method of the mixed matrix membrane with heat resistance and solvent resistance comprises the steps of preparing an original membrane of the mixed matrix membrane and performing thermal oxidative crosslinking, wherein the step of preparing an original membrane of the mixed matrix membrane comprises the following steps: preparing a membrane preparation liquid from graphene oxide, metal alkoxide, acetic acid, a polymer and an organic solvent and preparing the membrane; and performing in-situ synthesis of the mixed matrix membrane by means of a non-solvent phase inversion method. The original membrane has a lot of spongy holes and vertical dactylopore structures and meanwhile has a relatively high permeating separating property. The original membrane is subjected to thermal oxidative crosslinking to prepare the mixed matrix membrane with solvent resistance and thermal stability. The mixed matrix membrane not only can keep the porous structure and the high permeating separating property, but also has excellent solvent resistance and heat resistance.

Description

technical field

[0001] The invention relates to a heat-resistant and solvent-resistant mixed matrix membrane and its preparation method and application, belonging to the field of membrane separation technology and new materials. Background technique

[0002] Polymer membrane is an important part of membrane separation materials. Due to its simple manufacturing method and easy availability of raw materials, it is the most mature and one of the earliest widely used membrane materials. Mixed matrix membrane refers to a composite membrane prepared by filling inorganic materials as a dispersed phase in a polymer continuous phase. This type of membrane combines the excellent properties of organic and inorganic materials, and can improve the structure and separation performance of polymer membranes. Among the various preparation methods of mixed matrix membranes, the in situ synthesis method has attracted extensive attention because it can better uniformly disperse the inorganic p...

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