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A kind of hydrogel-solid amphiphilic particle of stable emulsion and preparation method thereof

A hydrogel and amphiphilic technology, applied in the field of hydrogel-solid amphiphilic particles and their preparation, can solve problems such as loss of stability, and achieve the effect of a simple preparation method

Active Publication Date: 2021-03-30
常州晶丽光学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Pickering emulsion is a thermally stable system. Although it has higher stability, the adsorption of solid particles on the interface is irreversible. Therefore, after being infiltrated by a liquid, it is easy to desorb at the interface and lose stability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Sodium alginate, calcium salt, cross-linking agent N,N-methylenebisacrylamide and thermosensitive polymer poly-N-isopropylacrylamide are co-dissolved in water as the water phase; wherein The concentration of sodium alginate is 5%, the amount of calcium chloride is 8% of sodium alginate, and the concentration of poly-N-isopropylacrylamide is 15%;

[0035] (2) preparing an oil phase containing nonionic surfactant fatty acid glycerides, wherein the quality of fatty acid glycerides is 1% of the mass of poly-N-isopropylacrylamide in step (1);

[0036] (3) The water phase and the oil phase are mixed, and the mixing ratio of the oil phase and the water phase is that the oil phase is 20% of the water phase quality, and is stirred and mixed at a stirring rate of 800r / min to prepare a monodisperse emulsion; use a pure oil phase Washing emulsion replaces the original oil phase and removes the effect of surfactant;

[0037] (4) The temperature of the emulsion is raised to 38° ...

Embodiment 2

[0041] (1) Sodium alginate, calcium salt, cross-linking agent N,N-methylenebisacrylamide and thermosensitive polymer poly-N-isopropylacrylamide are co-dissolved in water as the water phase; wherein The concentration of sodium alginate is 1%, the amount of calcium chloride is 5% of sodium alginate, and the concentration of poly-N-isopropylacrylamide is 10%;

[0042](2) preparing an oil phase containing nonionic surfactant fatty acid glycerides, wherein the quality of fatty acid glycerides is 1.5% of the mass of poly-N-isopropylacrylamide in step (1);

[0043] (3) The water phase and the oil phase are mixed, and the mixing ratio of the oil phase and the water phase is that the oil phase is 50% of the water phase quality, and is stirred and mixed at a stirring rate of 900r / min to prepare a monodisperse emulsion; use a pure oil phase Washing emulsion replaces the original oil phase and removes the effect of surfactant;

[0044] (4) The temperature of the emulsion is raised to 37°...

Embodiment 3

[0048] (1) Sodium alginate, calcium salt, cross-linking agent N,N-methylenebisacrylamide and thermosensitive polymer poly-N-isopropylacrylamide are co-dissolved in water as the water phase; wherein The concentration of sodium alginate is 5%, the amount of calcium chloride is 10% of sodium alginate, and the concentration of poly-N-isopropylacrylamide is 10%;

[0049] (2) preparation contains the oil phase of nonionic surfactant fatty acid glyceride, and the mixing ratio of oil phase and water phase is that oil phase is 30% of water phase quality, wherein the quality of fatty acid glyceride is step (1) in poly 2% by mass of N-isopropylacrylamide;

[0050] (3) Mix the water phase and the oil phase, stir and mix at a stirring rate of 800r / min to prepare a monodisperse emulsion; use the pure oil phase to wash the emulsion to replace the original oil phase, and remove the effect of the surfactant;

[0051] (4) The temperature of the emulsion is raised to 38° C. to precipitate poly-...

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Abstract

The invention provides a hydrogel-solid amphiphilic particle for emulsion stabilization. The hydrogel-solid amphiphilic particles are gel microspheres composed of network gel hemispheres obtained fromcalcium ion crosslinked sodium alginate and chemically crosslinked polymer network hemispheres having thermosensitivity, and have hydrophilic and hydrophobic high anisotropy. The preparation method of the hydrogel-solid amphiphilic particles comprises the following steps: dissolving sodium alginate, a calcium salt, a crosslinking agent and a thermosensitive polymer into water to serve as an aqueous phase; preparing an oil phase containing a nonionic surfactant; mixing the aqueous phase and the oil phase, and sharply stirring to prepare monodispersed emulsion; performing solvent replacement toremove the surfactant; raising the temperature of the emulsion, precipitating poly-N-isopropylacrylamide from the gel, forming hydrogel hemispheres from the sodium alginate and calcium ions, and forming the hydrogel-solid amphiphilic particle. The hydrogel-solid amphiphilic particle has an effect of stabilizing the emulsion at a high temperature of higher than 37 DEG C, so that the emulsion can be stored for a long time at the high temperature.

Description

technical field [0001] The invention relates to a hydrogel-solid amphiphilic particle for stabilizing an emulsion and a preparation method thereof, belonging to the field of polymer materials. Background technique [0002] An emulsion is a dispersion system composed of two immiscible liquid phases, in which the inner phase is dispersed in the outer phase in the form of droplets. In order to mix two incompatible liquids, we usually mix them into an emulsion state. For example, water and oil can be formed into an oil-in-water or water-in-oil emulsion by external forces such as vibration, stirring, and homogenizer, which can be used in the field of food or cosmetics. However, due to the large oil / water interface area, the emulsion is a thermodynamically unstable system. The stability of the emulsion is an important factor for its applicability. Usually, in order to maintain stability, a third type of substance, the stabilizer, must be added to the system. Traditional stabil...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L33/24C08L5/04C08K3/16C08J3/075
CPCC08J3/075C08J2333/24C08J2405/04C08K2003/162
Inventor 不公告发明人
Owner 常州晶丽光学科技有限公司
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