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Fluorinated acrylate copolymer pervaporation composite film and preparation method thereof

A technology of acrylate and pervaporation, applied in the field of membrane separation, to achieve the effects of firm adhesion, loose network structure, good affinity and adhesion

Active Publication Date: 2013-10-09
GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Publication No. 101108313 (Publication Date: 2008-01-23) discloses a method for surface modification of polytetrafluoroethylene porous membranes by amphiphilic fluorine-containing copolymers. The surface of the polytetrafluoroethylene porous membrane is modified, but this patent only changes the hydrophilicity of the surface of the polytetrafluoroethylene membrane, and does not change the structure and properties of the membrane material body. The prepared modified polytetrafluoroethylene porous membrane still has Properties of Porous Membrane

Method used

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  • Fluorinated acrylate copolymer pervaporation composite film and preparation method thereof
  • Fluorinated acrylate copolymer pervaporation composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] (1) Preparation of fluorine-containing acrylate copolymer microemulsion with nanoscale particles: Add 1.0 g of deionized water to a 25 ml reaction bottle (three-neck flask) equipped with a high-speed stirrer, and dissolve 1.2 g of trifluoroethyl methacrylate ester, 3.3 g isooctyl methacrylate, 0.2 g methacrylic acid, and 4.5 g polymerizable surfactant C 1 -PEO-C 11 -MA-40 was dissolved in deionized water, stirred at 15000rpm for 30min at a water bath temperature of 40°C, taken out, cooled to room temperature, and then ultrasonically dispersed for 10min to obtain a W / O microemulsion. Add 15 mM ammonium persulfate to the W / O microemulsion, stir at 15000 rpm for 10 min at room temperature, ultrasonically emulsify for 5 min, and pass nitrogen gas into the reaction bottle at a rate of 0.5 L / h for 10 min to ensure that the polymerization reaction is carried out under nitrogen protection. Add 15mM N,N,N',N'-tetramethylethylenediamine dropwise to the reaction flask while stirr...

Embodiment 2

[0038] (1) Preparation of fluorine-containing acrylate copolymer microemulsion with nanoscale particles: Add 1.5 g of deionized water to a 25 ml reaction bottle (three-necked flask) equipped with a high-speed stirrer, and dissolve 1 g of hexafluorobutyl methacrylate , 3.2g lauryl methacrylate, 0.2g N-methylolacrylamide and 4.2g polymerizable surfactant C 1 -PEO-C 11 -MA-40 was dissolved in deionized water, stirred at 18000 rpm for 20 minutes at a water bath temperature of 50°C, taken out, cooled to room temperature, and dispersed by ultrasonic for 15 minutes to obtain a W / O microemulsion. Add 10mM ammonium persulfate to the W / O microemulsion, stir at 18000rpm for 15min at room temperature, ultrasonically emulsify for 5min, and pass nitrogen gas into the reaction bottle at a rate of 0.5L / h for 10min to ensure that the polymerization reaction is carried out under nitrogen protection. While stirring at 300rpm, 10mM N,N,N',N'-tetramethylethylenediamine was added dropwise to the r...

Embodiment 3

[0041] (1) Preparation of fluorine-containing acrylate copolymer microemulsion with nanoscale particles: Add 1.5 g of deionized water to a 25 ml reaction bottle (three-neck flask) equipped with a high-speed stirrer, and dissolve 0.7 g of octafluoropentyl methacrylate ester, 3.55g butyl methacrylate, 0.2g acetoacetoxy ethyl methacrylate and 4.25g polymerizable surfactant C 1 -PEO-C 11 -MA-40 was dissolved in deionized water, stirred at 20,000 rpm for 20 minutes at a water bath temperature of 60°C, taken out, cooled to room temperature, and then ultrasonically dispersed for 10 minutes to obtain a W / O microemulsion. Add 10 mM ammonium persulfate to the W / O microemulsion, stir at 20,000 rpm for 20 min at room temperature, ultrasonically emulsify for 5 min, and pass nitrogen gas into the reaction bottle at a rate of 0.5 L / h for 10 min to ensure that the polymerization reaction is carried out under nitrogen protection. While stirring at 400 rpm, 10 mM N,N,N',N'-tetramethylethylened...

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Abstract

The invention discloses a fluorinated acrylate copolymer pervaporation composite film which comprises a supporting layer and an active separating layer, wherein the active separating layer is uniformly distributed on the supporting layer which is a polytetrafluoroethylene microporous supporting film. The active separating layer is a fluorinated acrylate copolymer. The surface composition and body structure of the fluorinated acrylate copolymer pervaporation composite film are controllable, and the fluorinated acrylate copolymer pervaporation composite film has better stability, heat resistance, corrosive resistance, and long service life. The invention further discloses a preparation method of the fluorinated acrylate copolymer pervaporation composite film. The preparation method has the advantage of effectively solving the problem of non-uniformity and crack in the film coating process, and the preparation method is simple and low in cost, and easy to realize industrialized production.

Description

technical field [0001] The invention relates to the field of membrane separation, in particular to a fluorine-containing acrylate copolymer pervaporation composite membrane and a preparation method thereof Background technique [0002] The main driving force for the development of pervaporation industrial applications is that it has the advantages of not introducing other materials in the process compared with traditional methods of separating liquid mixtures such as rectification, extraction, and adsorption, and has little environmental pollution, low energy consumption, compact equipment, low investment, and easy operation. Convenience and other advantages. The outstanding advantages of pervaporation membrane are high separation coefficient and not limited by vapor-liquid equilibrium, so it has broad application prospects in the separation of azeotrope and near-boiler which are difficult to separate by rectification, extraction and adsorption. At present, pervaporation is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/36B01D71/40B01D67/00B01D69/10B01D69/12
Inventor 陈静陈顺权何勇王建明郭亮
Owner GUANGZHOU INST OF ADVANCED TECH CHINESE ACAD OF SCI
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