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1-methyl cyclopropene slow release formulation and preparation method thereof

A technology of methylcyclopropene and sustained-release agent, which is applied in the field of 1-methylcyclopropene corrosion inhibitor and its preparation, can solve the problems of low content, short sustained-release time, and short fresh-keeping time of fruits and vegetables, and achieve extended release time , long release time and easy operation

Inactive Publication Date: 2011-10-19
WUHAN SHUANGQI TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the limited volume of the coated molecular cavity when α-cyclodextrin or β-cyclodextrin is used to embed 1-methylcyclopropene, the content of 1-methylcyclopropene in the prepared slow-release agent is low, and the effective content ≤4%. In addition, when α-cyclodextrin or β-cyclodextrin is used to embed 1-methylcyclopropene, both ends of the inclusion compound α-cyclodextrin or β-cyclodextrin molecular structure are open. Incomplete coating of the sustained-release agent leads to short sustained-release time of 1-methylcyclopropene, which reduces the use efficiency of 1-methylcyclopropene and shortens the preservation time of fruits and vegetables after picking

Method used

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  • 1-methyl cyclopropene slow release formulation and preparation method thereof

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Embodiment 1

[0024] A kind of 1-methylcyclopropene slow-release agent, coating film material is gelatin, core material is 1-methylcyclopropene, when preparing described 1-methylcyclopropene slow-release agent, the 1-methylcyclopropene used The usage weight ratio of cyclopropene and gelatin raw material is 20:100.

[0025] The preparation method of the 1-methylcyclopropene slow-release agent comprises the following steps successively:

[0026] 1) Add an appropriate amount of water into the reaction vessel, then add a certain amount of gelatin, stir to form a 10% solution by weight, put it in an ice bath, and control its temperature at 1-4°C;

[0027] 2) adding 1-methylcyclopropene equivalent to 20% by weight of gelatin into the reaction vessel, and stirring at a speed of 1000 rpm until a uniform gelatin-coated microemulsion of 1-methylcyclopropene is formed;

[0028] 3) Add sodium sulfate equal to the weight of gelatin for precipitation, and the 1-methylcyclopropene microemulsion will sett...

Embodiment 2

[0034] A 1-methylcyclopropene sustained-release agent, the coated film material is gelatin, and the core material is 1-methylcyclopropene. When preparing the 1-methylcyclopropene slow-release agent, the weight ratio of the 1-methylcyclopropene to the gelatin raw material used is 20:100.

[0035] Its preparation method comprises the following steps in turn:

[0036] 1) Add a certain amount of water into the reaction vessel, and then add a certain amount of gelatin to form a 2% solution by weight, put it in an ice bath, and control its temperature at 1-4°C;

[0037] 2) adding 1-methylcyclopropene equivalent to 20% by weight of gelatin into the reaction vessel, and stirring at a speed of 1000 rpm until a uniform gelatin-coated microemulsion of 1-methylcyclopropene is formed;

[0038] 3) adding 2% peach gum solution in parts by weight for precipitation, adjusting the pH value to 4 with acetic acid to complete the precipitation, and continuing to stir for 30 minutes;

[0039] 4) ...

Embodiment 3

[0044] A 1-methylcyclopropene sustained-release agent, the coating material is gelatin, and the core material is 1-methylcyclopropene. When preparing the 1-methylcyclopropene slow-release agent, the weight ratio of the 1-methylcyclopropene to the gelatin raw material used is 15:100.

[0045] Its preparation method comprises the following steps in turn:

[0046] 1) Add a certain amount of water into the reaction vessel, and then add a certain amount of gelatin to prepare a 6% solution by weight, put it in an ice bath, and control its temperature at 1-4°C;

[0047] 2) adding 1-methylcyclopropene equivalent to 15% by weight of gelatin into the reaction vessel, and stirring at a speed of 1000 rpm until a uniform gelatin-coated microemulsion of 1-methylcyclopropene is formed;

[0048] 3) adding sodium sulfate equal to the weight of gelatin for salting out and precipitation, and continuing to stir for 30 minutes;

[0049] 4) Add glutaraldehyde which is 5% by weight of gelatin to s...

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Abstract

The invention discloses a 1-methyl cyclopropene slow release formulation and a preparation method thereof. The slow release formulation consists of 1-methyl cyclopropene as a core material and a covering film wrapping outside the core material, and the selected covering film is gelatin. The preparation method of the 1-methyl cyclopropene slow release formulation sequentially includes the following steps: dissolving the gelatin in water to formulate solution with the weight percentage of 2-10% and controlling the temperature of the solution between 1-4 DEG C; adding 1-methyl cyclopropene and stirring to form a gelatin-coated 1-methyl cyclopropene microemulsion; adding precipitating agent so that the microemulsion precipitates in the system and continuing to stir for 20-30min; adding a film-solidifying agent to solidify the covering film; fitering and then washing the solidified product to obtain a slurry 1-methyl cyclopropene microcapsule; and adding a separating agent in the slurry 1-methyl cyclopropene microcapsule so that the microcapsule disperses. The product is high in content of effective substances and long in slow release time. The preparation method is simple in technology and convenient in operation.

Description

technical field [0001] The invention belongs to the technical field of fresh-keeping of fruits and vegetables, and specifically refers to a 1-methylcyclopropene corrosion inhibitor and a preparation method thereof. Background technique [0002] 1-Methylcyclopropene can effectively inhibit the aging effect of ethylene on harvested vegetables. The principle of action is that 1-Methylcyclopropene can be well combined with ethylene receptors to prolong the ripening and aging process of fruits and vegetables and achieve freshness preservation. However, 1-methylcyclopropene has a boiling point of about 10°C and exists in a gaseous state at room temperature, which is inconvenient to use. At present, α-cyclodextrin or β-cyclodextrin is widely used in China to make sustained-release preparations after embedding, so as to prolong the sustained-release time of 1-methylcyclopropene. However, due to the limited volume of the coated molecular cavity when α-cyclodextrin or β-cyclodextrin ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B7/152B01J13/02
Inventor 张平安童立恒
Owner WUHAN SHUANGQI TECH DEV
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