Preparation method of dual antibacterial emulsion gel

An emulsion gel, double technology, applied in food preservation, fruit and vegetable preservation, food science, etc., can solve the problems of complicated preparation process, unsuitable for anti-corrosion, fresh-keeping, high production cost, etc., and achieve simple preparation process, fast formation speed, The effect of long shelf life

Active Publication Date: 2015-09-30
HUAZHONG AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But above-mentioned these methods all need to add a large amount of organic solvents, and are solid dosage forms, are not suitable for anticorrosion, fresh-keeping of fresh fruits and vegetables, food etc., and preparation process is complicated, and production cost is higher

Method used

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  • Preparation method of dual antibacterial emulsion gel
  • Preparation method of dual antibacterial emulsion gel
  • Preparation method of dual antibacterial emulsion gel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Dissolve 1g of chitosan in 100g of 2% glacial acetic acid aqueous solution to prepare a chitosan solution, stir with a magnetic stirrer until the chitosan dissolves, then centrifuge at 3000r / min for 15min with a centrifuge Remove insoluble matter, vacuum degassing, obtain chitosan solution;

[0032] 2. Mix 5g cinnamaldehyde, 5g medium-chain glycerides, and 7.5g Tween 20, and stir on a magnetic stirrer for 5 minutes to make it evenly mixed, as the oil phase, and then slowly add it dropwise to 82.5g distilled water, continuously Stir for 15min to form a cinnamaldehyde emulsion;

[0033] 3. Slowly add 40g of cinnamaldehyde emulsion dropwise to 100g of chitosan solution, so that the mass ratio of chitosan and cinnamaldehyde is 1:2, adjust the pH of the system to be 4.6, keep stirring at 40°C for 20min, and let it stand for 30min. Instantly.

[0034] Detect respectively the chitosan solution that step 1) obtains, step 2) the cinnamic aldehyde emulsion that obtains and s...

Embodiment 2

[0036] 1. Dissolve 0.5g of chitosan in 100g of 1% glacial acetic acid aqueous solution to prepare a chitosan solution, stir with a magnetic stirrer until the chitosan dissolves, then centrifuge for 15 minutes to remove insoluble matter, and vacuum degass , to obtain chitosan solution;

[0037] 2. Mix 6g cinnamaldehyde, 6g soybean oil, and 7.5g Tween 80, and stir on a magnetic stirrer for 5 minutes to make it evenly mixed as the oil phase, then slowly add it dropwise to 80.5g distilled water, and continue stirring for 15 minutes , forming a cinnamaldehyde emulsion;

[0038] 3. Slowly add 25g of cinnamaldehyde emulsion dropwise to 100g of chitosan solution, so that the mass ratio of chitosan and cinnamaldehyde is 1:3, adjust the pH of the system to be 4.4, keep stirring at 20°C for 30min, and let it stand for 45min. Instantly.

[0039] Detect the bacteriostasis situation of chitosan solution, cinnamaldehyde emulsion and emulsion gel respectively to escherichia coli and Staphyl...

Embodiment 3

[0041] 1. Dissolve 2g of chitosan in 100g of 3% glacial acetic acid aqueous solution to prepare a chitosan solution, stir with a magnetic stirrer until the chitosan dissolves, then use a centrifuge for 15 minutes to remove insolubles, vacuum degassing, Obtain chitosan solution;

[0042] 2. Mix 2g of cinnamaldehyde, 8g of medium-chain glycerides, and 10g of polyoxyethylene 20, and stir on a magnetic stirrer to make it evenly mixed as the oil phase, then slowly add it dropwise to 80g of distilled water, and continue stirring for 15 minutes , forming a cinnamaldehyde emulsion;

[0043] 3. Slowly add 500g of cinnamaldehyde emulsion dropwise to 100g of chitosan solution, so that the mass ratio of chitosan and cinnamaldehyde is 1:5, adjust the pH of the system to 5.0, keep stirring at 60°C for 15min, and let it stand for 10min. Instantly.

[0044] Detect the bacteriostasis situation of chitosan solution, cinnamaldehyde emulsion and emulsion gel respectively to escherichia coli and...

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Abstract

The invention discloses a preparation method of dual antibacterial emulsion gel. The dual antibacterial emulsion gel is prepared by reacting a cinnamyl aldehyde oil-in-water emulsion as a crosslinking agent with a chitosan liquid. The bacteriostatic activity of the emulsion gel prepared by the method on escherichia coli and staphylococcus aureus is superior to that of single chitosan and cinnamyl aldehyde; the dual antibacterial emulsion gel does not contain an organic solvent, is mild in preparation condition, relatively safe to use, stable in quality, and relatively long in storage life, and can be widely applied to corrosion prevention and preservation of fresh fruits and vegetables and foods.

Description

technical field [0001] The invention relates to a preparation method of double antibacterial emulsion gel. Background technique [0002] Chitosan is the only natural cationic polysaccharide, which has a unique dual response to pH and temperature, and has good biocompatibility and biodegradability. The macromolecular chain contains amino groups and hydroxyl groups, which can be used for multiple modification and derivatization , is a biological material with a very wide range of uses, and is currently widely used in food, medicine, chemical industry, agriculture and other fields. Different types of chitosan-based biomaterials can be prepared by physical or chemical action. The amino group of chitosan molecular weight endows it with good antibacterial activity, which can be used as a kind of natural antibacterial agent. [0003] Cinnamaldehyde exists in large quantities in plants such as cinnamon, and is a yellow viscous liquid. Cinnamaldehyde has a strong inhibitory and ki...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/154
Inventor 李艳何宗泽陈欢乐雷玲玲
Owner HUAZHONG AGRI UNIV
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