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

A modified material, amphiphilic technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of unsatisfactory anti-pollution effect, serious flux attenuation, etc. Effects of fouling performance, superior membrane performance and mild process conditions

Active Publication Date: 2012-10-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 5g of poloxamer F127 block polymer (EO) 98 -(PO) 67 -(EO) 98 and 0.80g of hexafluorobutyl methacrylate (HFBMA) were placed in a three-necked flask with a stirrer, 100mL of deionized water was added, under nitrogen protection, stirred for 0.5h to form a stable emulsion, and an initiator solution (0.49g of nitric acid Cerium ammonium dissolved in 20mL 1mol / L HNO 3 Middle), after stirring at 60°C for 24h, the reaction solution was evaporated to remove water at 50°C and a vacuum of 0.1MPa, then washed with ethanol until the solid matter was completely dissolved, and then evaporated at 40°C and a vacuum of 0.1MPa Ethanol, vacuum dried at 50°C for 24h to obtain a white viscous solid (HFBMA) 4 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 4 Graft copolymer, the yield is close to 95%.

Embodiment 2

[0015] 5g of poloxamer F127 block polymer (EO) 98 -(PO) 67 -(EO) 98 and 1.60g of hexafluorobutyl methacrylate (HFBMA) were placed in a three-necked flask with a stirrer, 100mL of deionized water was added, under nitrogen protection, stirred for 0.5h to form a stable emulsion, and an initiator solution (0.49g of nitric acid Cerium ammonium dissolved in 20mL 1mol / L HNO 3 Middle), after stirring at 60°C for 24h, the reaction solution was evaporated to remove water at 50°C and a vacuum of 0.1MPa, then washed with ethanol until the solid matter was completely dissolved, and then evaporated at 40°C and a vacuum of 0.1MPa Ethanol, vacuum dried at 50°C for 24h to obtain a white viscous solid (HFBMA) 8 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 8 Graft copolymer, the yield is close to 95%.

Embodiment 3

[0017] 5g of poloxamer F127 block polymer (EO) 98 -(PO) 67 -(EO) 98 and 2.00g of hexafluorobutyl methacrylate (HFBMA) were placed in a three-necked flask with a stirrer, 100mL of deionized water was added, under nitrogen protection, stirred for 0.5h to form a stable emulsion, and an initiator solution (0.49g of nitric acid Cerium ammonium dissolved in 20mL 1mol / LHNO 3 Middle), after stirring at 60°C for 24h, the reaction solution was evaporated to remove water at 50°C and a vacuum of 0.1MPa, then washed with ethanol until the solid matter was completely dissolved, and then evaporated at 40°C and a vacuum of 0.1MPa Ethanol, vacuum dried at 50°C for 24h to obtain a white viscous solid (HFBMA) 10 -(EO) 98 -(PO) 67 -(EO) 98 -(HFBMA) 10 Graft copolymer, the yield is close to 95%.

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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 onthe 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

technical field [0001] 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 [0002] 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 high, and there are difficulties in large-scale application; while modifying the surface of the existi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F287/00C08F283/06C08F220/22B01D69/14B01D71/78
Inventor 姜忠义苏延磊陈文娟
Owner TIANJIN UNIV
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