Anti-pollution reverse osmosis membrane and preparation method thereof

By setting a nano-TiO2 layer on the surface of the reverse osmosis membrane and using the gap between the isopropyl alcohol water tank and the guanidine-based polymerization water tank, the reverse osmosis membrane can fully mix the top and bottom solutions during the immersion process, solving the problem of incomplete immersion of traditional reverse osmosis membranes, and improving the anti-pollution and high-throughput performance of the membrane.

CN119819135AInactive Publication Date: 2025-04-15CHONG QING AO TONG HUAN JING KE JI YOU XIAN GONG SI
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Patent Information

Application Number
CN202510014211.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-01-06
Publication Date
2025-04-15
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

During the soaking process, traditional reverse osmosis membranes are prone to delamination of the top and bottom layers, resulting in insufficient soaking and defects.

Method used

By setting the outer and inner surfaces of the reverse osmosis membrane, and using the gaps between the isopropyl alcohol water tank and the guanidine polymerization water tank during the preparation process, the reverse osmosis membrane can fully mix the top layer and bottom layer solutions during the movement to form a rotating vortex state, thereby improving the shaping and anti-pollution performance of the membrane.

Benefits of technology

Full mixing and adsorption of the reverse osmosis membrane surface solution is achieved, layering is avoided, the film's anti-pollution and high-throughput performance is improved, and the good desalination rate is maintained.

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Abstract

The invention relates to the field of chemical engineering, in particular to an anti-pollution reverse osmosis membrane and a preparation method thereof.The anti-pollution reverse osmosis membrane comprises a reverse osmosis membrane body, a nano TiO2 outer protection layer is arranged on the outer side surface of the reverse osmosis membrane body, a guanidyl polymerization layer is arranged on the other side surface of the reverse osmosis membrane body, a nano TiO2 inner protection layer is arranged on the outer side surface of the guanidyl polymerization layer, and the nano TiO2 outer protection layer is arranged on the outer side surface of the guanidyl polymerization layer. Comprising the following steps: S1, guiding reverse osmosis membrane raw materials into a raw material mixer according to a proportion; when the reverse osmosis membrane enters a supporting and fixing plate, a liquid scraping soft plate on the surface of one side of the supporting and fixing plate is matched to scrape most of a solution on the surface of the reverse osmosis membrane, and at the moment, a circulating heater is matched to inject high-temperature air into a circulating air pipe, so that the circulating air pipe guides hot air into an exhaust plate; and then hot air penetrates through an exhaust plate to enter a supporting and fixing plate, and is matched with inlets and outlets in the two ends of the supporting and fixing plate under the limitation of a liquid scraping soft plate.
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