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Preparation method of nanoparticle and nanofiber composite stable high internal phase emulsion

A nanofiber and nanoparticle technology, applied in the field of high internal phase emulsion, can solve the problems of oil leakage in demulsification, high cost of natural materials, adverse effects on human health, etc., and achieve safe use, good anti-oxidation performance, and good stability Effect

Active Publication Date: 2021-07-13
HUAZHONG AGRI UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] (1) In the commonly used high internal phase emulsion preparation technology, surfactants are often used to convert liquid oil into solid fat, which has adverse effects on human health
[0009] (2) In the prior art, natural materials that can be used to stabilize high internal phase emulsions are limited, and the cost of natural materials is higher than that of surfactants
[0010] (3) High internal phase emulsions prepared from natural materials usually have a short storage time, and there is a phenomenon of demulsification and oil leakage
Single zein particles and chitin nanofibers have limited emulsification ability and cannot stabilize high internal phase emulsions

Method used

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  • Preparation method of nanoparticle and nanofiber composite stable high internal phase emulsion
  • Preparation method of nanoparticle and nanofiber composite stable high internal phase emulsion
  • Preparation method of nanoparticle and nanofiber composite stable high internal phase emulsion

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preparation example Construction

[0051] Such as figure 1 As shown, the present invention provides a method for preparing a zein particle-chitin nanofiber composite stable high internal phase emulsion, comprising the following steps:

[0052] S101, dissolving zein in an aqueous ethanol solution, and preparing a dispersion of zein nanoparticles by an anti-solvent method.

[0053] S102, dissolving the chitin powder in distillation, adjusting the pH to 2.0-5.0 and stirring overnight, and mechanically treating to obtain a suspension of chitin nanofibers.

[0054] S103. Composite the zein nanoparticles and chitin nanofibers, and adjust the pH of the mixed solution to be between 4.0 and 9.0.

[0055] S104, performing high-speed shear homogenization on the solution system, adding oil dropwise to obtain a high internal phase emulsion with zein particles-chitin nanofibers composite and stable.

[0056] The preparation method of the stable high internal phase emulsion of the particle and nanofiber composite provided b...

Embodiment 1

[0059] 1. Dissolve 4 g of zein powder in 100 mL of ethanol solution (75% v / v), and then add the solution to 300 mL of ultrapure water under continuous stirring (800 r / min). After stirring for 15 minutes, the concentration of zein nanoparticles (ZCPs) was 6% w / v by removing ethanol and part of the water in the particle dispersion by using a rotary evaporator. The resulting solution was centrifuged at 1000 rpm for 10 minutes to remove insoluble precipitates.

[0060] 2. Disperse 2 g of chitin powder in 200 mL of distilled water, adjust the pH to 2.0-5.0 with HCl, and keep stirring overnight. Then the chitin suspension was homogenized by dynamic high pressure, homogenized 25 times under the condition of 1000bar to obtain the chitin nanofiber suspension (ChNFs) with 0.8% w / w, and dried to a constant weight at a constant temperature of 60°C to determine solids content.

[0061] 3. Mix 2ml of the ZCPs solution obtained in step 1 with 3mL of the ChNFs solution obtained in step 2 an...

Embodiment 2

[0070] 1. Dissolve 4 g of zein powder in 100 mL of ethanol solution (75% v / v), and then add the solution to 300 mL of ultrapure water under continuous stirring (800 r / min). After stirring for 15 minutes, the concentration of zein nanoparticles (ZCPs) was 6% w / v by removing ethanol and part of the water in the particle dispersion by using a rotary evaporator. The resulting solution was centrifuged at 1000 rpm for 10 min to remove insoluble precipitates.

[0071] 2. Disperse 2 g of chitin powder in 200 mL of distilled water, adjust the pH to 2.0-5.0 with HCl, and keep stirring overnight. Then the chitin suspension was homogenized by dynamic high pressure, homogenized 25 times under the condition of 1000bar to obtain the chitin nanofiber suspension (ChNFs) with 0.8% w / w, and dried to a constant weight at a constant temperature of 60°C to determine solids content.

[0072] 3. Add the ChNFs solution obtained in step (2) to the ZCPs solution obtained in step (1) in different volum...

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Abstract

The invention belongs to the technical field of high internal phase emulsion, and discloses a preparation method of a nanoparticle and nanofiber composite stable high internal phase emulsion. Zein is dissolved in distilled water, and zein is prepared by an anti-solvent method. Nanoparticle solution; dissolving chitin powder in distillation, adjusting the pH and stirring overnight, and obtaining chitin nanofiber suspension through mechanical treatment; mixing zein nanoparticles with chitin nanofibers to adjust the pH of the mixed solution; High-speed shearing and adding oil drop by drop to prepare zein particles-chitin nanofiber composite and stable high internal phase emulsion. In the present invention, the complex forms a special structure through pH regulation, and is used for stabilizing the high-internal-phase Pickering emulsion. The emulsion of the present invention does not use a surfactant, but the obtained emulsion has high stability and can be stable for more than one month, and has good anti-oxidation performance to oils and fats.

Description

technical field [0001] The invention belongs to the technical field of high internal phase emulsions, and in particular relates to a preparation method of a nanoparticle and nanofiber composite stable high internal phase emulsion. Specifically relates to a preparation method of a high internal phase Pickering emulsion stabilized by a composite of zein particles and chitin nanofibers. Background technique [0002] Currently, emulsifiers are commonly used in the food and pharmaceutical industries for the encapsulation and delivery of bioactive compounds. Emulsion, as a carrier system for functional active ingredients, can embed a variety of fat-soluble substances and significantly improve the solubility, stability and bioavailability of the core material. By controlling the composition of the oil phase and the water phase, the type of emulsifier and the emulsification conditions in the emulsion system, the properties of the emulsion can be improved and ideal products can be o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J3/03C08L91/00C08L89/00C08L5/08B01F3/08A23L29/10C11B5/00A61K9/107A61K47/42A61K47/36
CPCC08J3/03A23L29/10C11B5/0092A61K9/107A61K47/42A61K47/36C08J2391/00C08J2489/00C08J2405/08A23V2002/00B01F23/4141B01F23/41A23V2200/02A23V2200/222A23V2250/18A23V2250/511A23V2250/548
Inventor 李艳孙格格胡俊杰李斌刘石林
Owner HUAZHONG AGRI UNIV
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