Silver-loaded nano-TiO2 antimicrobial preservation method of Nanfeng mandarin oranges

A Nanfeng tangerine and fresh-keeping method technology, which is applied in the direction of fruit and vegetable preservation, food preservation, and protection of fruits/vegetables with a coating protective layer, to achieve the effects of prolonging the preservation period, reducing preservation costs, and inhibiting the reproduction and derivation of pathogenic bacteria

Inactive Publication Date: 2011-08-10
JIANGXI AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the spraying preservation of nano-materials is still in the initial stage of research and development. So far, there have been no relevant reports on the application of silver-loaded nano-TiO2 spraying to the preservation of thin-skinned fruits.

Method used

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  • Silver-loaded nano-TiO2 antimicrobial preservation method of Nanfeng mandarin oranges
  • Silver-loaded nano-TiO2 antimicrobial preservation method of Nanfeng mandarin oranges

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 2:

[0037] 1. Preparation of silver-loaded nano-titanium dioxide (TiO 2 ) powder: add 170ml of butyl phthalate to a separatory funnel filled with 400 ml of absolute ethanol and mix to obtain a mixture of butyl phthalate; take another 100 ml of glacial acetic acid and 400 ml of 95% ethanol and mix well , then add 5 ml to a concentration of 1mol.L -1 AgNO 3 solution to obtain a glacial acetic acid mixture; slowly and uniformly drop the butyl phthalate mixture into the glacial acetic acid mixture, and stir in the dark to obtain a transparent colloidal solution. Air-dry the transparent colloidal solution at room temperature, then dry it at a controlled temperature of 100 °C, grind the obtained dry gel into powder, and place it in a muffle furnace for calcination at a temperature controlled at 500 °C for 3 hours to obtain highly active silver-loaded Nano-TiO 2 powder.

[0038] 2. Preparation of silver-loaded nano-titanium dioxide fresh-keeping solution: If the ...

Embodiment 2

[0040] Example 3:

[0041] 1. Preparation of silver-loaded nano-titanium dioxide (TiO 2 ) powder: add 170ml of butyl phthalate to a separatory funnel filled with 400 ml of absolute ethanol and mix to obtain a mixture of butyl phthalate; take another 100 ml of glacial acetic acid and 400 ml of 95% ethanol and mix well , then add 5 ml to a concentration of 1mol.L -1 AgNO 3 solution to obtain a glacial acetic acid mixture; slowly and uniformly drop the butyl phthalate mixture into the glacial acetic acid mixture, and stir in the dark to obtain a transparent colloidal solution. Air-dry the transparent colloidal solution at room temperature, then dry it at a controlled temperature of 100°C, grind the obtained dry gel into powder, and place it in a muffle furnace for calcination at a controlled temperature of 600°C for 5 hours to obtain highly active silver-loaded Nano-TiO 2 powder.

[0042] 2. Preparation of silver-loaded nano-titanium dioxide fresh-keeping solution: If the so...

Embodiment 3

[0044] Example 4:

[0045] 1. Preparation of silver-loaded nano-titanium dioxide (TiO 2 ) powder: Add 500ml to a beaker to a concentration of 1mol.L -1 phthalic acid solution, and then add 20ml of AgNO containing the required amount of silver doping to the beaker 3 Solution, slowly heat up the phthalic acid solution added with silver nitrate solid, and control the temperature at about 100°C. After drying, pour the powder into a porcelain crucible, heat it to a high temperature for 4 hours at a heating rate of 10°C / min, and calcine it for 4 hours. Take it out and cool it. The solid in the porcelain crucible is poured into a mortar and ground to obtain highly active silver-loaded nano-TiO 2 powder.

[0046] 2. Preparation of silver-loaded nano-titanium dioxide fresh-keeping solution: If the solvent of 100 parts of water (calculated by mass) is used as the benchmark, the following substances can be selected according to the mass ratio: 10 parts of starch, 3 parts of baking sod...

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PUM

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Abstract

The invention discloses a silver-loaded nano-TiO2 antimicrobial preservation method of Nanfeng mandarin oranges, which comprises the following steps: preparing a high-activity inorganic nano-antibacterial agent, namely silver-loaded nano-TiO2 powder without toxicity or side effects into a preservation solution, performing film coating preservation on the surfaces of the Nanfeng mandarin oranges or placing freshly picked ripe Nanfeng mandarin oranges into the preservation solution for impregnation, getting a layer of dense protective film, and actively preventing and killing pathogenic bacteria. By adopting the method, original various nutritional ingredients in the Nanfeng mandarin oranges can be effectively preserved, original luster and flavor of the Nanfeng mandarin oranges can be kept, the Nanfeng mandarin oranges can be stored for a long time without peculiar smell, the preservation period can be further prolonged, the preservation effect of the Nanfeng mandarin oranges can be ensured, and the method is in line with the current research and development direction of novel green fruit and vegetable preservation agents. Silver-loaded nano-TiO2 has broad-spectrum antimicrobial and sterilizing functions, and can inhibit propagation and derivation of the pathogenic bacteria on the surfaces of fruit peels, realize a good antimicrobial effect, greatly reduce the rotting rate, prolong the preservation period of fruits, and further fully ensure the fruit quality of the Nanfeng mandarin oranges during the storage period.

Description

technical field [0001] The invention relates to a fresh-keeping method for thin-skinned fruits, in particular to Nanfeng tangerine silver-loaded nano-TiO during storage. 2 Antibacterial preservation method. Background technique: [0002] The thin-skinned and juicy Nanfeng Tangerine is a unique local orange species in Jiangxi. It has been cultivated for more than 1,300 years and has long enjoyed a high reputation in the world, known as the "king of oranges". In 2010, the planting area of ​​Nanfeng tangerines reached more than 1 million mu, and the annual output reached more than 1 billion kilograms. In recent years, the planting area and total output have increased greatly. [0003] Since the sales period of Nanfeng tangerine fresh fruit is only about 3 months, the storage period is generally as long as about 9 months. During storage, Nanfeng tangerines are vulnerable to bacteria such as penicillium, green mold, anthracnose, black rot, and pedicle rot, and the annual loss ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/16A23B7/157
Inventor 龙小艺张凤英白玲喻阳玉王义华
Owner JIANGXI AGRICULTURAL UNIVERSITY
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