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A kind of plastic wrap with ethylene adsorption and preparation method thereof

A technology of adsorption and fresh-keeping film, applied in the field of fresh-keeping film with ethylene adsorption and its preparation, can solve the problems of unfavorable large-scale popularization and use, high cost of physical methods, toxic and side effects, etc., and achieves good use prospects and long acting time. , the effect of small dosage

Active Publication Date: 2021-03-30
CHINA PHARM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Our country basically adopts physical and chemical methods to preserve fresh fruits and vegetables, but the cost of physical methods is high, the operation is cumbersome, and it is not conducive to large-scale promotion and use, and the chemical preservation methods are limited due to the toxic and side effects of chemical residues on the human body and environmental pollution. its use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Styrene (St), hydroxyethyl methacrylate (HEMA) perbasic alumina columns were used to remove the polymerization inhibitor in the monomer in advance. Add 5mL St, 170μL HEMA, 10mL tetrahydrofuran under nitrogen protection, react at 70°C overnight, precipitate under ice-bath n-hexane, filter and dry to obtain styrene hydroxyethyl methacrylate copolymer. Take 1.0 g of the product, dissolve it in 10 mL of THF, add 1 mL of methacrylic anhydride and 1 mL of triethylamine, react at room temperature overnight, precipitate in ice-bathed n-hexane, filter and dry to obtain a membrane material.

[0022] (2) Cultivate the mycobacterial bacteria liquid to OD600=1, take 50 mL of the bacterial liquid, centrifuge at 4000 rpm for 15 minutes, wash the bacteria sludge with phosphate buffer, and centrifuge again to get the bacteria sludge, repeat this 3 times, and finally record Weight 0.60g. Weigh 1.00g of skimmed milk powder, dissolve it with 10 mL of deionized water to obtain a 10% sk...

Embodiment 2

[0026] (1) Styrene (St), hydroxyethyl methacrylate (HEMA) perbasic alumina columns were used to remove the polymerization inhibitor in the monomer in advance. Add 5mL St, 170μL HEMA, 10mL tetrahydrofuran under nitrogen protection, react at 70°C overnight, precipitate under ice-bath n-hexane, filter and dry to obtain styrene hydroxyethyl methacrylate copolymer. Take 1.0 g of the product, dissolve it in 10 mL of THF, add 1 mL of methacrylic anhydride and 1 mL of triethylamine, react at room temperature overnight, precipitate in ice-bathed n-hexane, filter and dry to obtain a membrane material.

[0027] (2) Cultivate the mycobacterial bacteria liquid to OD600=1, take 50 mL of the bacterial liquid, centrifuge at 4800 rpm for 15 minutes, wash the bacteria sludge with phosphate buffer, and centrifuge again to get the bacteria sludge, repeat this 3 times, and finally record Weight 0.60g. Weigh 1.00g of skimmed milk powder, dissolve it with 10 mL of deionized water to obtain a 10% sk...

Embodiment 3

[0031] (1) Styrene (St), hydroxyethyl methacrylate (HEMA) perbasic alumina columns were used to remove the polymerization inhibitor in the monomer in advance. Add 5mL St, 170μL HEMA, 10mL tetrahydrofuran under nitrogen protection, react at 70°C overnight, precipitate under ice-bath n-hexane, filter and dry to obtain styrene hydroxyethyl methacrylate copolymer. Take 1.0 g of the product, dissolve it in 10 mL of THF, add 1 mL of methacrylic anhydride and 1 mL of triethylamine, react at room temperature overnight, precipitate in ice-bathed n-hexane, filter and dry to obtain a membrane material.

[0032] (2) Cultivate the mycobacterial bacteria liquid to OD600=1, take 50 mL of the bacterial liquid, centrifuge at 4500 rpm for 15 minutes, wash the bacteria sludge with phosphate buffer, and centrifuge again to get the bacteria sludge, repeat this 3 times, and finally record Weight 0.60g. Weigh 1.00g of skimmed milk powder, dissolve it with 10 mL of deionized water to obtain a 10% sk...

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PUM

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Abstract

The invention discloses a fresh-keeping film with an ethylene adsorption effect and a preparation method thereof. The fresh-keeping film is prepared from styrene, hydroxyethyl methacrylate, methacrylic anhydride and freeze-dried bacterium powder; wherein the freeze-dried bacterium powder is prepared from mycobacteria as a raw material; and the mycobacteria is Mycobacterium Rhodesiae with the ATCCnumber being BAA-494. The preparation method of the fresh-keeping film comprises the steps that firstly the styrene, the hydroxyethyl methacrylate and the methacrylic anhydride are polymerized to be prepared into a film material; and then the freeze-dried bacterium powder and the film material are mixed and solidified through ultraviolet illumination, and thus the fresh-keeping film is prepared. The preparation process is simple; the preparation cycle is short; the ethylene adsorption effect is good; the fresh-keeping film is safe, non-toxic and environmentally friendly; a new direction is provided for the fresh keeping of fruits and vegetables; and the fresh-keeping film has good use prospects.

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 film with ethylene adsorption and a preparation method thereof. Background technique [0002] With the continuous improvement of living standards, consumers not only have an increasing demand for fruits and vegetables (referred to as fruits and vegetables), but also put forward higher requirements for the freshness of fruits and vegetables. Fruits and vegetables after picking are still living organisms. In order to maintain their life activities, they are constantly respiration to generate heat and water. Because fruits and vegetables are fresh and tender, they are prone to self-deterioration and rot loss in the process of transportation, sales and storage after picking, which brings great economic losses to producers and operators. [0003] Ethylene, also known as plant ripening hormone, is a natural metabolite produced...

Claims

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Application Information

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IPC IPC(8): C08L25/14C08L89/00C08J5/18
CPCC08J5/18C08J2325/14C08J2489/00
Inventor 曹崇江周海武袁彪黄德春陈维
Owner CHINA PHARM UNIV