Fluorine-containing amphipathic modifying material for preparing antifouling membrane and preparation method thereof

Abstract

The invention relates to a fluorine-containing amphipathic modifying material for preparing an antifouling membrane and a preparation method thereof. The fluorine-containing amphipathic modifying material has a structure formula shown in the specification. The preparation method of the fluorine-containing amphipathic modifying material comprises the following steps of: feeding a polyethylene glycol-polymethoxy propylene-polyethylene glycol segmented copolymer and methacrylic acid hexafluorobutyl according to mole ratio into deionized water to obtain an emulsified liquid; feeding ammonium ceric nitrate as an initiator under the protection of nitrogen gas, stirring and reacting to obtain a reaction solution containing a product; and carrying out water removal, impurity removal and drying on the reaction solution to obtain the fluorine-containing amphipathic modifying material. The invention has the advantages that the preparation method has mild process and conditions and is simple and feasible; and the obtained fluorine-containing amphipathic modifying material is used for preparing the antifouling membrane with excellent performances.

Description

Fluorine-containing amphiphilic modified material for preparing antifouling membrane and preparation method thereof technical field The invention relates to a fluorine-containing amphiphilic modified material for preparing an anti-pollution membrane and a preparation method thereof, belonging to the technology of membrane-making materials. Background technique An important factor affecting membrane fouling is the membrane material. Most of the existing membrane materials are hydrophobic polymer membranes, and the hydrophobicity of the membrane is likely to cause serious membrane fouling. Poor separation properties and tolerance limit the wide application of these materials. Therefore, at present, the attention to solve membrane fouling is focused on the preparation of low-fouling separation membranes, including the development of new polymer materials, modification of existing membrane materials and modification of existing membrane surfaces. The cost of the first two is ...

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Problems solved by technology

However, looking at the existing research on the performance of modified anti-fouling membranes, it is obvious that pure hydrophilic modification has not achieved satisfactory anti-fouling effects. Although the cleaning and recovery performance of the membrane has been improved, the flux attenuation is still serious.

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