Preparation method of fluorine-containing modified epoxy copolymer oil-water separating membrane

A technology for epoxy copolymerization of oil and water, applied in separation methods, liquid separation, chemical instruments and methods, etc., can solve the problems of high manufacturing cost, inability to recycle, poor stability, etc., and achieve super-hydrophobicity and super-lipophilic stability. , the preparation method is simple, and the raw materials are cheap.

Inactive Publication Date: 2015-06-24
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the material is not hydrophobic enough to stabilize
[0005] In general, although the superhydrophobic / superoleophilic materials in the prior art can achieve oil-water separation, there are also problems such as complicated and cumbersome preparation methods, high manufacturing costs, poor stability, high temperature curing, and cannot be recycled, or Introduce heavy metals and other toxic and harmful components to cause secondary pollution and other defects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] A method for preparing a fluorine-containing modified epoxy copolymer oil-water separation membrane, the present invention is characterized in that the steps are:

[0018] 1). The preparation of fluorine-containing water-based self-emulsifying epoxy resin emulsion is obtained by the following method: using bisphenol A novolac epoxy resin as the base resin, using benzoic acid as the ring-opening agent, and part of the epoxy group of the epoxy resin Group opening synthesis of hydroxyl-containing bisphenol A novolac epoxy resin; through the reaction of maleic anhydride and hydroxyl groups on the epoxy resin, carboxyl hydrophilic groups and carbon-carbon double bonds are introduced into the epoxy resin, and introduced by free radical polymerization Fluoride, obtained from the emulsified fluorine-containing anion bisphenol A novolac epoxy resin; then it is prepared into a fluorine-containing water-based epoxy resin emulsion by phase inversion emulsification technology;

[00...

Embodiment 1

[0031]In the inclined four-neck flask equipped with thermometer, stirrer, reflux condenser, add 45.5g (0.2mol) bisphenol A novolak epoxy resin and 26.43g (0.3mol) dioxane, the water bath is heated up to 95 °C allows the resin molecules to fully stretch in the solvent. Weigh 8.55g (0.07mol) of benzoic acid and 0.4546g of catalyst tetrabutylammonium bromide and dissolve them in a small amount of dioxane, respectively. First add the catalyst tetrabutylammonium bromide solution into the reaction kettle at one time, then pour the benzoic acid solution into the constant pressure funnel, and slowly drop it into the reaction kettle within 1.5 hours under the control of the dropping speed. Then keep the reaction temperature at 95°C for 4.5h. After the reaction between benzoic acid and epoxy resin is complete, reduce the temperature of the water bath to 80°C, then weigh 6.8642g (0.07mol) of maleic anhydride, 0.3410g of catalyst tetrabutylammonium bromide, and 0.3410g of hydroquinone wi...

Embodiment 2

[0033] In the inclined four-neck flask equipped with thermometer, stirrer, reflux condenser, add 45.5g (0.2mol) bisphenol A novolak epoxy resin and 26.43g (0.3mol) dioxane, the water bath is heated up to 95 °C allows the resin molecules to fully stretch in the solvent. Weigh 8.55g (0.07mol) of benzoic acid and 0.4546g of catalyst tetrabutylammonium bromide and dissolve them in a small amount of dioxane, respectively. First add the catalyst tetrabutylammonium bromide solution into the reaction kettle at one time, then pour the benzoic acid solution into the constant pressure funnel, and slowly drop it into the reaction kettle within 1.5 hours under the control of the dropping speed. Then keep the reaction temperature at 95°C for 4.5h. After the reaction between benzoic acid and epoxy resin is complete, reduce the temperature of the water bath to 80°C, then weigh 6.8642g (0.07mol) of maleic anhydride, 0.3410g of catalyst tetrabutylammonium bromide, and 0.3410g of hydroquinone w...

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Abstract

The invention relates to a preparation method of a fluorine-containing modified epoxy copolymer oil-water separating membrane. The oil-water separating membrane with superhydrophobicity and superlipophilicity is prepared by using a curing agent under a proper condition through a dip-coating method comprising the steps of firstly, carrying out ring opening reaction on epoxy resin, and adding double bonds; then, introducing a fluorine monomer to the epoxy resin in a free radical polymerization way; preparing an emulsion from fluorine-containing epoxy resin through phase inversion; and curing the fluorine-containing epoxy resin emulsion on filter paper. The fluorine-containing modified epoxy copolymer oil-water separating membrane is simple in preparation method, high in pore permeability, good in oil-water separating effect and capable of filtering impurities with the particle sizes of more than 0.25mm.

Description

technical field [0001] The invention belongs to the technical fields of chemical engineering and polymer functional materials, and in particular relates to a preparation method of an oil-water separation membrane with superhydrophobic and superlipophilic functions. Background technique [0002] Moisture in aviation kerosene, gasoline, transformer oil and other oils will accelerate oil deterioration, or corrode equipment components, and even cause system failures, directly affecting the life of the engine and even the safety of aircraft, automobiles, and transformers. The oil-water separator is made of a separation filter element coated with hydrophobic and lipophilic materials. When the oil passes through, the difference in contact characteristics between the surface of the material and the surface of the oil and water can be used to intercept the tiny water droplets and effectively remove the oil in the oil. Trace moisture. [0003] The key technology of the separation fil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G59/14B01D17/022
Inventor 何运华夏桓桓于萍周良伟罗运柏
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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