Pickering emulsion with CO2/double-response type surfactant and preparation method of Pickering emulsion

A surfactant and emulsion technology, applied in the field of Pickering emulsion and preparation, can solve the problems of unsuitability for industrial application, complex chemical synthesis process, cumbersome preparation, etc., and achieve simple preparation method, simple response process, and low dosage Effect

Active Publication Date: 2021-08-24
DONGYING SPRING PETROLEUM ENG TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, researchers have developed a series of colloidal particles with switch-responsive properties. However, most of these nanoparticles are organic polymer pa

Method used

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  • Pickering emulsion with CO2/double-response type surfactant and preparation method of Pickering emulsion
  • Pickering emulsion with CO2/double-response type surfactant and preparation method of Pickering emulsion

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1:

[0032] The first step, the carboxy-modified nano silica particles were prepared

[0033] First, the silica nanoparticles are accurately weighted with a silica nanoparticle 5g, and 9 ml of aminopropyltriethoxysilane and 100 ml of the amount of the amount of the toluene were used to add a 250 ml flask, and a few drops of triethylamine were added. The promoter was placed in a 110 ° C oil bath for magnetic stirring and reflux reaction for 5 h. After the end of the reaction, cooled to room temperature, centrifuge by centrifuge, remove solvent toluene, and rinse with water and water and absolute ethanol, and then dried to give silica nanoparticles of surface aminocya.

[0034]The silica nanoparticles having a surface aminocylated silica nanoparticle were added to the flask containing 100 mL of N, N-dimethylformamide solvent, and the ultrasonic instrument was placed around 10 min, so that the nanoparticles sufficiently dispersed in the solvent, Then, tanotharhyric anh...

Example Embodiment

[0038] Example 2:

[0039] CO 2 / Oxidation is reduced to the double stimulating response surfactant to stabilize the performance of the emulsion, adding different mass ferrocene surfactants to 10 ml of deionized water, dispersion uniform in deionized water with ultrasonic instruments (surface The concentration of the aqueous solution of the active agent was added to a 30 ml glass vial, and 10 ml of paraffin oil was added, and the vortex oscillator was emulsified at 1000 rpm Rotate, and a stable emulsion was not obtained, indicating that the surfactant concentration A stable emulsion is not formed when less than CMC.

Example Embodiment

[0040] Example 3:

[0041] CO 2 / Oxidation is reduced to the surface activation of the carboxylated silica nanoparticles.

[0042] Option One:

[0043] 0.00299 g of ferrocene surfactants were added to 10 ml of deionized water (using a concentration of 1.0 × 10 in the use of aqueous phase) -3 Mol·L -1 At the same time, at the same time, 0.1 g of different sizes of carboxy-modified nano silica particles (the aqueous phase) was 1 wt%, the native particle diameter was 20 nm, 30 nm, 50 nm, 100 nm, 200 nm, respectively, using ultrasound instruments It is uniform in deionized water, and the above solution is added to a 30 ml glass vial containing 10 ml of paraffin oil, and the vortex oscillator is utilized to emulsify 3 min at 1000 rpm to give a stable Pickering emulsion, which is as follows.

[0044] Option II:

[0045] Different concentrations of ferrocene surfactants were added to 10 ml of deionized water (from 0.00299 g, 0.004495 g, 0.00599 g, 0.004485 g, 0.00598 g), and 0.1 g of ca...

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Abstract

The invention discloses a Pickering emulsion with a CO2/double-response surfactant and a preparation method of the Pickering emulsion, which belong to the technical field of oil and gas field chemical agents. The preparation method comprises the following steps of firstly preparing carboxyl modified nano silicon dioxide particles, then preparing a CO2/redox dual-responsive surfactant, finally mixing the carboxyl modified nano silicon dioxide particles and the CO2/redox dual-responsive surfactant according to a certain proportion, adding the mixture into an oil phase and a water phase according to a certain proportion, and emulsifying through a vortex oscillator at a certain rotating speed to obtain the product. The emulsion has good stability, when the emulsion does not need to be kept in a stable state any more, the stable state of the emulsion can be broken and demulsification can be achieved only by introducing CO2 or adding an oxidizing agent into an emulsion system, on the other hand, the reversible emulsification process can be achieved by introducing N2 or adding a reducing agent into the emulsion, and the stable emulsion is obtained again.

Description

technical field [0001] The invention belongs to the technical field of oil and gas field chemicals, in particular to a chemical agent with CO 2 Pickering emulsion and preparation method of double responsive surfactant. Background technique [0002] Emulsions are widely used in production and life, but sometimes the emulsions only need to be stable in a certain stage, and in the subsequent stage, these emulsions need to be broken to avoid adverse effects. For example, in crude oil extraction, a surfactant needs to be added to form a stable emulsion at a specific stage, and these stable emulsions are required to be demulsified in the subsequent process. In these cases, additional physical or chemical disruption mechanisms must be introduced into the system to destabilize the emulsion, which significantly increases capital and operating costs. In order to meet the needs of production and life, researchers have conducted extensive research on switch-responsive emulsifiers in r...

Claims

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Application Information

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IPC IPC(8): C09K8/584C09K8/60
CPCC09K8/584C09K8/602
Inventor 任海宁孙春同孙永强孙霜青韩庆建赵䶮胡松青
Owner DONGYING SPRING PETROLEUM ENG TECH
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