Composite reverse osmosis membrane as well as preparation method and application thereof

Abstract

The invention discloses a high-flux composite reverse osmosis membrane as well as a preparation method and application thereof. The composite reverse osmosis membrane comprises a bottom layer, a porous support layer in the middle and an active separation layer on the surface, wherein the active separation layer is a polyamide active separation layer formed by interfacial polymerization of polyamine and polyacyl chloride in the presence of methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate (Polarclean). By adding a water-phase additive which is simple in variety and small in dosage, the prepared composite reverse osmosis membrane has excellent water flux and keeps good interception characteristics. In addition, the preparation method is simple and convenient to operate and has a great industrial application prospect.

Description

technical field

[0001] The invention relates to the technical field of membrane separation, in particular to a composite reverse osmosis membrane and its preparation method and application. Background technique

[0002] Reverse osmosis is a process in which the pressure difference on both sides of the semi-permeable membrane is used as the driving force to make the solvent selectively pass through the membrane to achieve the separation of solvent and solute. Compared with the traditional separation process, this process has no phase change, low energy consumption, and is environmentally friendly. With high water yield, it not only plays an important role in seawater desalination, sewage treatment and ultrapure water preparation, but also is gradually being used in petrochemical, metallurgy, light industry, electronics, food, textile, medicine, bioengineering and other fields.

[0003] As the core of the reverse osmosis process, the research and development and application of...

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