Water-in-water Pickering emulsion and preparation method thereof

A water-in-water emulsion technology, which is applied in the field of water-in-water emulsion preparation, can solve the problems of complex equipment, difficulty in preparing water-in-water emulsion, and inability to prepare stable water-in-water emulsion, and achieve the effect of solving the difficulty of preparation

Active Publication Date: 2021-01-12
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the defects or improvement needs of the prior art, the present invention provides a water-in-water Pickering emulsion and a preparation method thereof, combining the surface tension and the interface thickness characteristics of the water-in-water emulsion system itself, the preparation method of the water-in-water emulsion is carried out Redesign, especially with the help of impinging flow assisted emulsification, first introduce solid particle stabilizers into the continuous phase, and then use the impact shearing effect of two continuous phase impinging flows to introduce the dispersed phase in the highly turbulent flow area formed by the impact, one-step method Generate a stable water-in-water Pickering emulsion, thereby solving the technical problems of the prior art that the water-in-water emulsion is difficult to prepare, the device is complicated, and the traditional impinging flow method cannot prepare a stable water-in-water emulsion

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  • Water-in-water Pickering emulsion and preparation method thereof
  • Water-in-water Pickering emulsion and preparation method thereof
  • Water-in-water Pickering emulsion and preparation method thereof

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preparation example Construction

[0047] The present invention aims at the technical problem of difficult preparation of water-in-water emulsion in the prior art, especially for two incompatible water phases, i.e. water phase continuous phase and water phase dispersed phase, proposes a brand new emulsification method, this The method is capable of obtaining a stable water-in-water emulsion. The preparation method of the water-in-water Pickering emulsion proposed by the present invention, the water-in-water Pickering emulsion is obtained by mixing the water-phase continuous phase, the water-phase dispersed phase and the particle stabilizer, and then emulsifying by impinging flow, the water-phase continuous phase and the water phase The dispersed phase is an aqueous solution of a water-soluble polymer, and the continuous phase of the water phase and the dispersion of the water phase are immiscible with each other; the preparation method comprises the following steps:

[0048] The water-phase continuous phase dis...

Embodiment 1

[0075] Preparation mass fraction is respectively 5% polyethylene glycol aqueous solution A (molecular weight is 88000Da, solubility parameter is 9.38 (Cal / cm 3 ) 0.5 ) and 5% dextran aqueous solution B (its molecular weight is 500000Da, solubility parameter is 23.1 (Cal / cm 3 ) 0.5 ), then respectively get 10 milliliters (volume ratio 1:1) of the above-mentioned solution and mix, after standing, make it phase separation. Take the upper phase and the lower phase in two containers respectively, wherein the liquid with less volume is used as the dispersed phase, and the liquid with more volume is used as the continuous phase. The continuous phase is placed in the impingement flow device, and the mass fraction of 0.01% cellulose solid particles is added to disperse in the continuous phase, and the water phase continuous phase dispersed with the particle stabilizer forms two strands through the diversion of the internal components of the impingement flow device. For the fluids co...

Embodiment 2

[0077] Preparation mass fraction is respectively 10% polyethylene glycol aqueous solution A (molecular weight is 88000Da, solubility parameter is 9.38 (Cal / cm 3 ) 0.5 ) and 10% dextran aqueous solution B (its molecular weight is 500000Da, solubility parameter is 23.1 (Cal / cm 3 ) 0.5), get 10 milliliters of polyethylene glycol aqueous solution and the above-mentioned solution of 50 milliliters polydextran aqueous solution (volume ratio 1:5) and mix, after standing, make it phase separation. Take the upper phase and the lower phase in two containers respectively, wherein the liquid with less volume is used as the dispersed phase, and the liquid with more volume is used as the continuous phase. The continuous phase is placed in the impinging flow device, and the mass fraction of 0.70% cellulose solid particles is added to disperse in the continuous phase, and the water phase continuous phase dispersed with the particle stabilizer forms two strands through the diversion of the i...

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Abstract

The invention belongs to the field of water-in-water emulsion preparation, and particularly relates to a water-in-water Pickering emulsion and a preparation method thereof. The method comprises the following steps: forming two streams of oppositely-impacting fluid from a water-phase continuous phase in which a particle stabilizer is dispersed through the flow guide effect of internal components ofan impinging stream device, adding a water-phase dispersed phase into a high turbulence region generated by the two oppositely-impacting continuous phases in an impinging region, and performing shearing emulsification in the high turbulence region by utilizing the shearing effect of the two streams of oppositely-impinging fluid so as to prepare the stable water-in-water Pickering emulsion. According to the method, the stable water-in-water Pickering emulsion is generated through a one-step method by utilizing the shearing dispersion of impinging stream and the emulsification effect of the particle stabilizer, so the technical problem that an existing water-in-water emulsion is difficult to prepare on a large scale is solved.

Description

technical field [0001] The invention belongs to the field of preparation of water-in-water emulsions, and more specifically relates to a water-in-water Pickering emulsion and a preparation method thereof. Background technique [0002] Emulsions are widely used in the fields of food, medicine, and cosmetics. In traditional processes, emulsification equipment and methods such as stirred reactors, ultrasonic emulsification, and membrane emulsification are usually used to prepare water-in-oil (W / O), oil-in-water (O / W), water-in-oil-in-water (W / O / W), oil-in-water-in-oil (O / W / O) and other types of emulsions. [0003] Different from the above-mentioned emulsion types such as water-in-oil (W / O) and oil-in-water (O / W), the water-in-water (W / W) emulsion is composed of an aqueous solution of two immiscible hydrophilic polymers with A certain proportion is mixed to form. When no stabilizer is added, it will eventually form two immiscible macroscopic phases, that is, "aqueous two-phas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/03C08L71/02C08L5/02C08L1/02C08L89/00C08K7/00C08K3/04
CPCC08J3/03C08J2305/02C08J2371/02C08J2389/00C08J2401/02C08J2471/02C08J2489/00C08K7/00C08K2201/011C08K3/042
Inventor 刘石林李斌李艳李晶梁宏闪
Owner HUAZHONG AGRI UNIV
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