Hydrophility anti-pollution polyamide composite reverse osmosis membrane and preparation method thereof

A reverse osmosis membrane, anti-pollution technology, applied in the field of water treatment, can solve the problems of inability to form a hydrophilic coating, low activity, limited amount of active groups, etc., and achieve good hydrophilicity, anti-pollution ability, and graft density. The effect of high and short process flow
CN104525005AInactive Publication Date: 2015-04-22HUNAN OVAY TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
HUNAN OVAY TECH CO LTD
Publication Date
2015-04-22
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a hydrophility anti-pollution polyamide composite reverse osmosis membrane. The hydrophility anti-pollution polyamide composite reverse osmosis membrane comprises a porous supporting layer, a crosslinking polyamide layer and an acrylics or methacrylate structure unit which is grafted to the crosslinking polyamide layer through a free radical polymerization reaction and contains hydrophilic groups. The invention further provides a preparation method of the hydrophility anti-pollution polyamide composite reverse osmosis membrane. A layer of hydrophility molecular brushes are formed on the surface of a polyamide composite membrane through a free radical polymerization grafting method, the grafting density is higher, and the prepared polyamide composite membrane has better hydrophility and pollution resistance. The preparation method is simple, easy to operate, short in process, low in cost and capable of realizing industrial large-scale production.
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Description

technical field

[0001] The invention relates to a hydrophilic anti-pollution polyamide composite reverse osmosis membrane and a preparation method thereof, belonging to the technical field of water treatment. Background technique

[0002] Reverse osmosis membrane separation technology has separation characteristics such as high efficiency, low energy consumption, and high selectivity, and has been widely used in seawater desalination, separation and concentration, drinking water purification, waste water recycling and other fields. Polyamide composite membrane has the advantages of high rejection rate, large flux, excellent chemical stability, wide pH range (4-11), and low operating pressure requirements, and has become the mainstream product in the field of reverse osmosis membranes. However, the application of polyamide composite membranes also has serious membrane fouling problems, especially in the fields of highly polluted water treatment, water reuse, and chemical sepa...

Claims

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