Mixture applied to reactivity coagulating bath and application thereof

Abstract

The invention relates to a mixture applied to reactivity coagulating bath. The mixture comprises a prepolymer, a first organic solvent and water, wherein the prepolymer is obtained through polymerization of a functional monomer and a silane coupling agent under the action of an initiator. The invention further provides a preparation method of a polymer microporous membrane by utilizing the mixtureapplied to reactivity coagulating bath. In specific, a primary membrane is placed in the reactivity coagulating bath for curing to obtain the polymer microporous membrane; during the separating process, the prepolymer in the reactivity coagulating bath is transferred to between polymer molecular chains of the primary membrane and has self-crosslinking to realize functionalization modification ofthe polymer.

Description

technical field

[0001] The invention relates to the field of polymer microporous membranes, in particular to a mixture used in reactive coagulation baths and a preparation method for preparing polymer microporous membranes by using the mixture. Background technique

[0002] Polymer membrane materials often have low surface free energy and strong hydrophobicity. During their use, they are easily contaminated by organic substances such as proteins and bacteria, resulting in decreased flux and reduced separation efficiency, thereby shortening the service life of the membrane. Therefore, it is very important to enhance the hydrophilicity of polymer microporous membranes, reduce membrane fouling, and increase water flux.

[0003] At present, the commonly used modification methods for polymer microporous membranes include surface grafting, surface coating, and physical blending. However, these three modification methods all have certain disadvantages, such as the surface grafting...

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