Reverse osmosis membrane element surface co-deposition modifier, modification method and device

Abstract

The invention belongs to the technical field of membrane element surface modification, and particularly relates to a reverse osmosis membrane element surface co-deposition modifier, a modification method and a modification device. The invention provides the reverse osmosis membrane element surface co-deposition modifier, the modification method and the device, a trihydroxymethyl aminomethane buffer solution of dopamine hydrochloride and polyethyleneimine is used as the modifier, the reverse osmosis membrane element surface modification device is adopted, and through a dopamine polyethyleneimine co-deposition mode, a co-deposition layer is formed on the surface of the reverse osmosis membrane element for carrying out surface modification on the reverse osmosis membrane element to be modified. The surface of the reverse osmosis membrane element modified by adopting the reverse osmosis membrane element surface co-deposition modifier, the modification method and the device provided by the invention is provided with the polydopamine polyethyleneimine co-deposition layer, so that the reverse osmosis membrane element has very strong hydrophilicity and nucleophilicity, and the water yield, pollution resistance and chlorine resistance of the reverse osmosis membrane element can be effectively improved.

Description

Technical field[0001]The present invention belongs to the field of surface modification techniques of membrane elements, and more particularly to a surface co-deposition modifier, modification method, and apparatus for reverse osmosis membrane elements.Background technique[0002]In reverse osmosis method, the purchase fee of the reverse osmosis membrane component accounts for about 10% of the total investment of the project, and the energy consumed by the desalination process of the reverse osmosis membrane element accounts for 70% of the total engineering energy consumption. Improvement of reverse osmosis membrane desalination rate, water supply, anti-pollution and chlorine resistance to reduce the investment of reverse osmosis, water supply, water energy consumption, and water production costs are very important. A large number of scientific studies modified the surface of the reverse osmosis membrane by surface coating, chemical deposition, secondary interface polymerization, surf...

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Problems solved by technology

[0003] However, there are currently no published patents related to methods or devices suitable for surface modification of reverse osmosis membrane elements.

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