Preparation method and application of a core-shell type fluoropolymer nanoemulsion

A nanoemulsion and polymer technology, which is applied in the direction of drilling compositions, chemical instruments and methods, etc., can solve the problems of increased cost and difficulty in processing, and achieve good compatibility, easy access, and strong wetting reversal ability Effect

Active Publication Date: 2022-03-22
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The commonly used method is to use surfactants, injecting a large amount of surfactants into the formation to improve the wettability of the reservoir, but the introduction of a large amount of surfactants will cause strong emulsification in the production and flowback fluid, which will Leading to increased use cost and post-processing difficulty

Method used

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  • Preparation method and application of a core-shell type fluoropolymer nanoemulsion
  • Preparation method and application of a core-shell type fluoropolymer nanoemulsion
  • Preparation method and application of a core-shell type fluoropolymer nanoemulsion

Examples

Experimental program
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Effect test

Embodiment 1

[0044] In a 250mL three-necked flask with a reflux device and electromagnetic stirring, add 50mL distilled water and 1.0g sodium perfluorononenyloxybenzenesulfonate respectively, and after the solid is completely dissolved, add 1.0g (0.01mol) methyl methacrylate Ester (acrylic monomer) and 0.5g initiator azobisisobutyronitrile (AIBN) were dissolved in 50mL of N,N-dimethylformamide (DMF) and added to water, and heated to React at 80°C for 4 hours to obtain a prepolymer emulsion. After cooling to room temperature, add 6.0 g (0.015 mol) of dodecafluoroheptyl methacrylate (fluorine-containing monomer) into the prepolymer emulsion, ultrasonically emulsify at room temperature for 30 minutes, then raise the temperature to 80 ° C for 4 hours to obtain a white Emulsion products. The particle size distribution of the emulsion is 150-250nm; it is placed under normal temperature and pressure for 60 days without delamination.

Embodiment 2

[0046] The preparation method was as described in Example 1, except that the acrylic monomer was 1.4 g (0.01 mol) butyl methacrylate. The obtained product emulsion has a particle size distribution of 200-250nm; it is placed under normal temperature and pressure for 60 days without delamination.

Embodiment 3

[0048] The preparation method was as described in Example 1, except that the fluorine-containing monomer was 6.5 g (0.015 mol) of 2-(perfluorohexyl) ethyl methacrylate. The obtained product emulsion has a particle size distribution of 150-250nm; it is placed under normal temperature and pressure for 60 days without delamination.

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Abstract

The invention relates to a preparation method and application of a core-shell type fluorine-containing polymer nanoemulsion. The method includes prepolymerizing acrylic monomers in water in the presence of emulsifiers and initiators to prepare polymer core nanoemulsions; then, dissolving fluorine-containing monomers in organic solvents and adding them to polymer core nanoemulsions Secondary polymerization to obtain a fluorine-containing polymer nanoemulsion with a core-shell structure. The application of the core-shell type fluorine-containing polymer nanoemulsion in changing the wettability of the reservoir changes the wettability of the reservoir from hydrophilic to superhydrophobic.

Description

technical field [0001] The invention relates to a preparation method and application of a core-shell type fluorine-containing polymer nanoemulsion, and belongs to the technical fields of oil field chemistry and colloid and interface chemistry. Background technique [0002] Composite materials with core-shell structure have a wide range of applications in cosmetics, coating materials, water treatment, and catalytic loading due to their high specific surface area, large pore volume, rich mesoporous structure, etc. application prospects. In the preparation process of superphobic surfaces, reducing the free energy of the interface is the core issue in changing the wettability of the interface. Since the carbon-fluorine bond has extremely low free energy, the introduction of fluorine-containing compounds into the material structure can significantly reduce the free energy of the material. Therefore, preparing the fluorine-containing material as a core-shell structure can make i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F265/06C08F220/22C08F220/24C08F2/26C09K8/588
CPCC08F265/06C08F2/26C09K8/588C08F220/22C08F220/24
Inventor 王彦玲梁雷刘斌巩锦程李永飞汤龙皓张传保
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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