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Fresh-keeping material capable of efficiently removing ethylene and preparation method of fresh-keeping material

A fresh-keeping material, ethylene technology, applied in botany equipment and methods, plant preservation, fruit and vegetable preservation, etc., can solve the problems of easy contamination of fruit and vegetable surfaces, limited adsorption capacity, unstable ethylene, etc., to reduce ethylene content, prepare The method is simple and the effect of prolonging freshness

Pending Publication Date: 2022-03-18
SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The commonly used ethylene absorbents are mostly inorganic porous materials (zeolite, activated carbon, etc.) and potassium permanganate materials supported by synthetic resins. On the one hand, these materials have limited adsorption capacity, and the adsorbed ethylene is unstable and easy to desorb; on the other hand , the loaded potassium permanganate has certain toxicity and color, and it is easy to contaminate the surface of fruits and vegetables, posing a safety hazard

Method used

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  • Fresh-keeping material capable of efficiently removing ethylene and preparation method of fresh-keeping material
  • Fresh-keeping material capable of efficiently removing ethylene and preparation method of fresh-keeping material
  • Fresh-keeping material capable of efficiently removing ethylene and preparation method of fresh-keeping material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) prepare the hydrochloric acid solution of 0.5mol / L;

[0043](2) Acidification treatment of the carrier material: 10 g of halloysite nanotubes were weighed, added to 250 mL of hydrochloric acid solution, heated to 50° C., and acidified for 2 hours. The acidified halloysite nanotubes were washed with deionized water to pH=7. Then, put it into an oven at 100° C. and dry for 2 hours to obtain acidified halloysite nanotubes;

[0044] (3) Weigh 5.0 g of acidified halloysite nanotubes, weigh 2.5 g of CuCl, put the two into an agate mortar and grind them fully at the same time, and drop 1 mL (2 drops) of hydrochloric acid solution prepared to make the two well mixed;

[0045] (4) Put the uniformly mixed sample into a tube furnace and heat it up to 400°C for calcination. The heating rate is set at 5°C / min, and it is roasted for 4 hours. Before calcination, the tube furnace is filled with nitrogen for protection. Finally, it is naturally cooled to room temperature to obtai...

Embodiment 2

[0048] (1) prepare the sulfuric acid solution of 0.5mol / L;

[0049] (2) Acidification treatment of the carrier material: 10 g of halloysite nanotubes were weighed, added to 250 mL of sulfuric acid solution, heated to 50° C., and acidified for 2 hours. The acidified halloysite nanotubes were washed with deionized water to pH=7. Then, put it into an oven at 100° C. and dry for 2 hours to obtain acidified halloysite nanotubes;

[0050] (3) Weigh 5.0 g of acidified halloysite nanotubes, weigh 5.0 g of CuCl, put the two into an agate mortar and grind them fully at the same time, and drop 1 mL (2 drops) of acidic solution to make the two well mixed;

[0051] (4) Put the uniformly mixed sample into a tube furnace and heat it up to 500°C for calcination. The heating rate is set at 5°C / min, and it is roasted for 4 hours. Before calcination, the tube furnace is filled with nitrogen for protection. Finally, it is naturally cooled to room temperature to obtain a fresh-keeping material ...

Embodiment 3

[0053] (1) prepare the hydrochloric acid solution of 1.0mol / L;

[0054] (2) Acidification treatment of carrier material: 10 g of halloysite nanotubes were weighed, added to 250 mL of hydrochloric acid solution, heated to 50° C., and acidified for 2.5 hours. The acidified halloysite nanotubes were washed with deionized water to pH=7. Then, put it into an oven at 100° C. and dry for 2 hours to obtain acidified halloysite nanotubes;

[0055] (3) Weigh 5.0 g of acidified halloysite nanotubes, weigh 5.0 g of CuCl, put the two into an agate mortar and grind them fully at the same time, and drop 1 mL (2 drops) of acidic solution to make the two well mixed;

[0056] (4) Put the uniformly mixed sample into a tube furnace and heat it up to 400°C for calcination. The heating rate is set at 5°C / min, and it is roasted for 4 hours. Before calcination, the tube furnace is filled with nitrogen for protection. Finally, it is naturally cooled to room temperature to obtain a fresh-keeping mat...

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Abstract

The invention discloses a fresh-keeping material capable of efficiently removing ethylene, and belongs to the technical field of fresh keeping of fruits and vegetables. A transition metal Cu (I) compound is used as an ethylene fixing agent, and the ethylene fixing agent is loaded on an acidized porous carrier material to form the fresh-keeping material capable of efficiently removing ethylene. The porous carrier material is one of a halloysite nanotube, a carbon nanotube, activated carbon, montmorillonite, attapulgite, diatomite and a molecular sieve. According to the invention, the fixing agent is adsorbed on the porous carrier material, so that the fixing agent adsorbed on the porous carrier material reacts with ethylene through a sigma-pi bond to form a complex, and the porous carrier material with a relatively large specific surface area not only can improve the adsorption capacity to ethylene, but also can load the fixing agent to a great extent; the preparation method of the fresh-keeping material provided by the invention is simple, easy to operate and outstanding in effect, ethylene released by the fruits and vegetables can be effectively removed, and the freshness and shelf life of the fruits and vegetables are prolonged.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping of fruits and vegetables, and in particular relates to a fresh-keeping material for efficiently removing ethylene and a preparation method thereof. Background technique [0002] As we all know, ethylene is a plant hormone that affects plant growth and maturity. It is often used to accelerate the ripening of fruits and vegetables. Even in low temperature environments, fruits, vegetables and flowers will continuously release ethylene during refrigeration and transportation to accelerate ripening. and corruption. Proper amount of ethylene can promote the growth of fruits and vegetables, and can also increase the taste and color of fruits and vegetables. For postharvest fruits and vegetables, the release of ethylene will accelerate the maturity and spoilage of fruits and vegetables, causing great economic losses to postharvest storage and transportation. In addition, the removal of ethylene in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/152A01N3/00
CPCA23B7/152A01N3/00
Inventor 王超杨子明李普旺杜丽清刘运浩何祖宇周闯宋书会
Owner SOUTH SUBTROPICAL CROPS RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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