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Antibacterial microcapsule polylactic acid packaging film and preparation method for same

A polylactic acid and packaging film technology, applied in packaging, wrapping paper, biological packaging, etc., can solve the problems of limited application and irritating odor, and achieve the effects of reducing irritating odor, cheap price, and prolonging the use time.

Inactive Publication Date: 2014-06-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, trans-2-hexenal itself is volatile and has a pungent odor in large concentrations, which limits its application in food packaging

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of antibacterial microcapsule polylactic acid packaging film comprises the following steps:

[0028] A, the trans-2-hexenal of 0.26 grams is dissolved in the ethanol of 306 grams, stirs and obtains trans-2-hexenal ethanol solution;

[0029] b. Add 5 grams of β-cyclodextrin and 100 grams of deionized water into the reaction vessel and stir evenly. The stirring speed is controlled at 300r / min. Heat the reaction vessel in a water bath at 80°C for 2 hours. After heating, add trans-2-hexenal ethanol solution, keep stirring for 2 hours, put the reaction vessel in a vacuum drying oven after the heat preservation and stirring, and vacuum dry at 80°C for 2 hours to obtain clathrate powder;

[0030] c. Add 40 grams of polylactic acid particles into 3.54 grams of dichloromethane and stir to obtain polylactic acid base liquid, and the stirring speed is controlled at 300r / min;

[0031] d. Add clathrate powder and polylactic acid base liquid to the reaction vess...

Embodiment 2

[0035] A preparation method of antibacterial microcapsule polylactic acid packaging film comprises the following steps:

[0036] A, the trans-2-hexenal of 0.49 grams is dissolved in the ethanol of 577 grams, stirs and obtains trans-2-hexenal ethanol solution;

[0037]b. Add 6 grams of β-cyclodextrin and 110 grams of deionized water into the reaction vessel and stir evenly. The stirring speed is controlled at 400r / min. Heat the reaction vessel in a water bath at 85°C for 3 hours. After heating, add trans-2-hexenal ethanol solution, keep stirring for 3 hours, put the reaction container in a vacuum drying oven after the heat preservation and stirring, and vacuum dry at 85°C for 2 hours to obtain clathrate powder;

[0038] c. Add 60 grams of polylactic acid particles into 5.30 grams of dichloromethane and stir evenly to obtain polylactic acid base liquid, and the stirring speed is controlled at 350r / min;

[0039] d. Add clathrate powder and polylactic acid base solution into the ...

Embodiment 3

[0043] A preparation method of antibacterial microcapsule polylactic acid packaging film comprises the following steps:

[0044] A, the trans-2-hexenal of 0.35 grams is dissolved in the ethanol of 450 grams, stirs and obtains trans-2-hexenal ethanol solution;

[0045] b. Add 5.5 grams of β-cyclodextrin and 105 grams of deionized water into the reaction vessel and stir evenly. The stirring speed is controlled at 350r / min. Heat the reaction vessel in a water bath at 82°C for 2.5 hours. After heating, add trans-2-hexenal ethanol solution, heat preservation and stirring for 2.5 hours, after heat preservation and stirring, put the reaction vessel in a vacuum drying oven, and vacuum dry at 82°C for 2.5 hours to obtain clathrate powder;

[0046] c. Add 50 grams of polylactic acid particles into 4.2 grams of dichloromethane and stir evenly to obtain polylactic acid base liquid, and the stirring speed is controlled at 320r / min;

[0047] d. Add clathrate powder and polylactic acid base...

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Abstract

The invention discloses an antibacterial microcapsule polylactic acid packaging film and a preparation method for the same. The antibacterial microcapsule polylactic acid packaging film comprises the following components in parts by weight: 5 to 6 parts of beta-cyclodextrin, 0.26 to 0.49 part of trans-2-hexenal, 306 to 577 parts of ethanol, 40 to 60 parts of polylactic acid and 3.54 to 5.30 parts of dichloromethane. The preparation method comprises the following steps of preparing a trans-2-hexenal ethanol solution from trans-2-hexenal and ethanol, vacuum-drying the beta-cyclodextrin, de-ionized water and the trans-2-hexenal ethanol solution to prepare inclusion compound powder, preparing a polylactic acid basic solution from polylactic acid and dichloromethane, mixing the inclusion compound powder and the polylactic acid basic solution, laying, baking and cooling the mixture to room temperature, and pulling off a thin film on a flat plate to obtain the antibacterial microcapsule polylactic acid packaging film. The antibacterial microcapsule polylactic acid packaging film has breaking elongation of 4 to 10 percent, tensile strength of 57.31 to 82.56MPa and rigidity of 24,188 to 33,615N / m.

Description

technical field [0001] The invention discloses an antibacterial microcapsule polylactic acid packaging film, and also discloses a preparation method of the antibacterial microcapsule polylactic acid packaging film. Background technique [0002] With economic development and social progress, people are increasingly concerned about food safety issues. In the process of food production, storage, transportation and sales, it is necessary not only to pay attention to the shelf life of food, but also to ensure that the quality of food remains unchanged during the shelf life. Among them, one of the main factors affecting food safety is microorganisms. Traditionally, antimicrobial agents before food packaging are directly incorporated into the formula of food processing, and most of them are directly added to the inside of the food to inhibit the growth of bacteria and delay food spoilage. The disadvantages of this method of addition: on the one hand, consumers will consume too mu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L5/16C08K5/07C08J5/18B65D65/38
CPCY02W90/10
Inventor 王利强马淑凤马学芬樊世芳郑琪欢
Owner JIANGNAN UNIV
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