Use of adamantane-1,3-diamine in preparation of reverse osmosis membranes with controllable desalination performance, reverse osmosis membrane, preparation method and application

By introducing adamantane-1,3-diamine into the reverse osmosis membrane preparation to regulate the twisted orientation of the polyamide layer, the problem of maintaining the same membrane surface morphology and permeate flux under different application scenarios in the existing technology is solved, realizing flexible control of desalination performance and improving the overall efficiency and economy of seawater desalination system.

CN119793245BActive Publication Date: 2026-05-26TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN SEA WATER DESALINATION & COMPLEX UTILIZATION INST STATE OCEANOGRAPHI
Filing Date
2025-01-03
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing seawater desalination reverse osmosis membranes cannot maintain the same membrane surface morphology and permeate flux in different application scenarios, while meeting the requirements of different desalination performance, which leads to the need to change the desalination process or increase the complexity and cost of operation.

Method used

By introducing adamantane-1,3-diamine as an aqueous amine monomer during the preparation of reverse osmosis membranes, the large size and rigid structure of adamantane can be used to control the twisting orientation of the polyamide layer, thereby forming reverse osmosis membranes with the same surface morphology but different desalination performance.

Benefits of technology

It enables flexible adjustment of the desalination performance of reverse osmosis membranes without changing existing desalination processes and operations, meeting diverse needs in different application scenarios and improving system efficiency and economy.

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Abstract

This invention provides the application of adamantane-1,3-diamine in the preparation of reverse osmosis membranes with controllable desalination performance, the reverse osmosis membrane itself, its preparation method, and its application, relating to the field of reverse osmosis membrane preparation. The controllable desalination performance reverse osmosis membrane includes a polysulfone ultrafiltration membrane and a polyamide layer disposed on the surface of the polysulfone ultrafiltration membrane; wherein the polyamide layer is formed by interfacial polymerization of an aqueous amine solution and an organic acyl chloride solution followed by heat treatment and curing; and the aqueous amine solution contains adamantane-1,3-diamine. This invention, by adding adamantane-1,3-diamine, prepares a series of SWRO membranes with similar surface morphology and permeate flux, but different desalination performances. This allows for flexible fulfillment of diverse application requirements without altering existing permeate processes and membrane cleaning processes, improving the overall efficiency and economy of the system.
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