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High-internal-phase switching emulsion with stable particles, preparation method and particle recovery method

A technology with high internal phase and particles, applied in the field of emulsion preparation, can solve problems such as instability, and achieve the effect of reducing the possibility of coalescence, good recyclability, and reducing environmental burden

Active Publication Date: 2021-09-17
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such HIPEs not only require more surfactants but are also unstable due to their easy desorption from the oil-water interface
Since the Pickering emulsion was reported by Ramsden and Pickering in 1903 and 1907, a large number of researchers have conducted in-depth research on it and applied it in various aspects, such as food, cosmetics, medicine, petroleum and polymerization, only solid particles Or the synergistic effect of solid particles and surfactants can form a Pickering emulsion stably, which mainly depends on the wettability of solid particles to the oil phase and water phase; however, Pickering emulsions can only reduce the amount of surfactants to a certain extent, so There is a need for a stable particle high internal phase emulsion with a smaller amount of surfactant and particle

Method used

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  • High-internal-phase switching emulsion with stable particles, preparation method and particle recovery method
  • High-internal-phase switching emulsion with stable particles, preparation method and particle recovery method
  • High-internal-phase switching emulsion with stable particles, preparation method and particle recovery method

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The quality of each main substance in this implementation is as follows: FA: 0.0060g, OA: 0.0044g, SiO 2 : 0.0150g, octane 3.75g.

[0031] S1: Add FA and OA into NaOH aqueous solution, stir continuously until they are completely dissolved, and obtain a colorless and transparent dynamic covalent bond surfactant aqueous solution, which is characterized by infrared and NMR. The results are as follows figure 1 and figure 2 , figure 2 (a) is FA-OA aqueous solution, (b) is FA, (c) is OA;

[0032] S2: SiO with particle size within 20-400nm 2 Nanoparticles are added to an aqueous solution of a dynamic covalent bond surfactant to obtain an aqueous phase;

[0033] S3: Add octane to the water phase, and use a 20000r / min homogenizer to stir for 2 minutes to obtain a particle-stabilized high internal phase switch emulsion.

[0034] Fluorescence, optical micrographs, and optical photographs of the particle-stabilized high-internal phase switch emulsion prepared in this example...

Embodiment 2

[0036] The quality of each main substance in this implementation is as follows: FA: 0.0110g, OA: 0.0087g, SiO 2 : 0.0200g, octane 4.00g.

[0037] S1: Add FA and OA into NaOH aqueous solution, stir continuously until completely dissolved, and obtain a colorless and transparent dynamic covalent bond surfactant aqueous solution, which is characterized by infrared and nuclear magnetic resonance;

[0038] S2: SiO with particle size within 20-400nm 2 Nanoparticles are added to an aqueous solution of a dynamic covalent bond surfactant to obtain an aqueous phase;

[0039] S3: Add octane to the water phase, and stir for 4 minutes with a 18000 r / min homogenizer to obtain a particle-stabilized high internal phase switch emulsion.

Embodiment 3

[0041] The quality of each main substance in this implementation is as follows: FA: 0.017g, OA: 0.0130g, SiO 2 : 0.0250g, octane 4.10g.

[0042] S1: Add FA and OA into NaOH aqueous solution, stir continuously until completely dissolved, and obtain a colorless and transparent dynamic covalent bond surfactant aqueous solution, which is characterized by infrared and nuclear magnetic resonance;

[0043] S2: SiO with particle size within 20-400nm 2 Nanoparticles are added to an aqueous solution of a dynamic covalent bond surfactant to obtain an aqueous phase;

[0044] S3: Add octane to the water phase, and use a 22000r / min homogenizer to stir for 3 minutes to obtain a particle-stabilized high internal phase switch emulsion.

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Abstract

The invention discloses a high-internal-phase switching emulsion with stable particles, a preparation method, application and a particle recovery method. The high-internal-phase switching emulsion with stable particles comprises a dynamic covalent bond surfactant, an oil phase, particles and alkali liquor, wherein the particles and the dynamic covalent bond surfactant generate an electrostatic repulsion effect. The dynamic covalent bond surfactant, the particles and the alkali liquor form an aqueous phase, the proportion of the aqueous phase is 18-25 wt%, the proportion of the oil phase is 75-82 wt%, and the pH value of the high internal phase switch emulsion with the stable particles is larger than or equal to 12. The stable-particle high-internal-phase switch emulsion has good stability, can realize rapid demulsification when the pH value is adjusted to be less than or equal to 4.5, and is beneficial to particle recovery.

Description

technical field [0001] The invention belongs to the technical field of emulsion preparation, and in particular relates to a particle-stabilized high-internal-phase switch emulsion, a preparation method thereof, an application thereof, and a method for recovering particles in the particle-stabilized high-internal-phase switch emulsion. Background technique [0002] Traditional emulsions are thermodynamically unstable systems formed by two immiscible phases under the action of surfactants. According to the phase volume law, when the uniform spherical dispersed phase is stacked, the liquid volume only accounts for 74% of the total volume. When it is greater than 74%, the internal phase gradually changes from spherical to polygonal, forming high internal phase emulsions (HIPEs). The most common HIPEs are only stabilized with surfactants. Such HIPEs not only require more surfactants but are also unstable due to their easy desorption from the oil-water interface. Since the Pick...

Claims

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Application Information

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IPC IPC(8): B01F17/00B01D17/04C09K23/00
CPCB01D17/047
Inventor 鲁红升张颖戴姗姗王宝刚贾振福
Owner SOUTHWEST PETROLEUM UNIV
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