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A kind of plant source extract antibacterial fresh-keeping film and its preparation method and application

The technology of plant source extract and fresh-keeping film is applied in the field of plant-derived extract antibacterial fresh-keeping film and its preparation field, which can solve the problems of low water vapor transmission rate, environmental pollution, non-degradation and the like, and achieves good moisture permeability, air permeability, antibacterial Broad spectrum and low cost effect

Active Publication Date: 2017-06-16
广州怡馨舒生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the fresh-keeping films used in the market are PE and PP fresh-keeping films. Due to the low water vapor transmission rate of this kind of fresh-keeping films, although they can keep the moisture of vegetables and fruits well, they will cause a lot of water and Carbon dioxide, on the contrary, will make the shelf life of some vegetables and fruits unsatisfactory due to carbon dioxide poisoning; moreover, this kind of plastic wrap is disposable, and it is usually discarded as garbage after use, and due to the difficulty of recycling and non-degradability, it will cause harm to the environment. severe pollution

Method used

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  • A kind of plant source extract antibacterial fresh-keeping film and its preparation method and application
  • A kind of plant source extract antibacterial fresh-keeping film and its preparation method and application
  • A kind of plant source extract antibacterial fresh-keeping film and its preparation method and application

Examples

Experimental program
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Effect test

preparation example Construction

[0038] The preparation process of the Eupatoria adenophorum ethanol extract used in the present invention is as follows: the leaves of Eupatoria adenophorum are dried and pulverized at room temperature, and passed through 50 sieves to obtain Eupatoria adenophorum powder; put the Eupatoria adenophorum powder into an extraction kettle , adding an ethanol solution with a concentration of 95% by volume, soaking and extracting at 40°C for 3 times, each extraction for 24 hours, and filtering through 8 layers of gauze. The final filtrate was vacuum-concentrated with a rotary evaporator to a concentration of 60 mg / ml (60 mg of solid matter per 1 ml) to obtain a concentrated solution of Eupatorium adenophorum.

[0039] Concentration test: Accurately pipette 1ml of uniform extract in a vessel with a pipette gun, put it in a freeze dryer to remove solvent, concentrated concentration=(m 1 -m 2 ) / 1ml, where m 1 is the mass of vessel and solid, m 2 For the quality of the vessel.

Embodiment 1

[0041] (1) Preparation of PVA films containing different components:

[0042] A film: Add 10g of polyvinyl alcohol (PVA-088200) into 90g of deionized water, and let it stand for 12 hours to fully swell. Stir at a temperature of 80°C at a speed of 200 rpm for 1h, the polyvinyl alcohol is completely dissolved, and a polyvinyl alcohol solution I with a concentration of 10wt% is obtained; solution I is added with 0.5wt at 40°C under stirring (200rpm) % boric acid solution 3ml, after stirring for 0.5h, add 2ml of 4mol / L hydrochloric acid and 1g of glycerin, and continue to insulate and stir for 1h to obtain solution II; 2 Add 3mL of the solution into the solution II, heat and stir for 30 minutes, and disperse evenly to obtain the solution III. Pour an appropriate amount of the solution III on a clean flat glass, cast it into a film, and dry it under natural conditions to obtain the A film and store it in a desiccator. In, pending antibacterial test;

[0043]Film B: Add 10g of pol...

Embodiment 2

[0057] (1) Add 15g of polyvinyl alcohol (088-20) to 85g of deionized water and let it stand for 12 hours to fully swell. Stir at a temperature of 95°C at a speed of 200 rpm for 1h, the polyvinyl alcohol is completely dissolved, and a polyvinyl alcohol solution with a concentration of 15wt% is prepared, and 0.5wt% of polyvinyl alcohol is added at 45°C under stirring (200rpm). Boric acid solution 5ml, after stirring for 0.5h, add 2ml of 4mol / L hydrochloric acid and 1.2g of glycerin, continue to insulate and stir for 1h to obtain solution I;

[0058] (2) Take 10mg / ml nano TiO 2 Add 3 mL of the solution to the solution I prepared in step (1), and continue to stir at 45°C for 30 minutes until the solution is evenly dispersed to obtain solution II;

[0059] (3) Take 5 g of Eupatorium adenophorum ethanol extract of 60 mg / ml, add 0.5 g Tween 80, stir and emulsify at room temperature at a speed of 200 rpm to obtain solution III;

[0060] (4) After solution II is cooled to room temper...

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Abstract

The invention discloses a plant source extract anti-bacterial preservative film, and a preparation method and application thereof. According to the method, boracic acid and hydrochloric acid are used for modifying vinol; then, the modified vinol is uniformly mixed with nanometer titania; next, the mixture is uniformly mixed with crofton weed ethanol extracts emulsified by tween-80; film casting is performed; the materials are dried under the natural conditions; the plant source extract anti-bacterial preservative film is obtained. The film has the proper oxygen permeability and moisture permeability; due to plant source extracts contained in the preservative film, preserved articles can be prevented from getting rotten through being infected by bacteria; ethylene gas generated by fruit and vegetables can be degraded by nanometer materials; meanwhile, the film also has excellent mechanical property. The plant source extract anti-bacterial preservative film is mainly applied to the fields of preservative package of fruit and vegetables, sea products and cereal subsidiary food and the like, and can also be applied to food container coverage, so that the food is prevented from getting rotten through being polluted by bacteria; the storage life is prolonged.

Description

technical field [0001] The invention relates to a fresh-keeping film, in particular to a plant source extract antibacterial fresh-keeping film and its preparation method and application. Background technique [0002] With the improvement of the living standard of the general public, fruits appear on the dining table more and more frequently and become a necessity of life. How to keep the fresh taste of fruit has become a common concern of fruit farmers and consumers. The commonly used fresh-keeping method is refrigeration, but tropical fruits such as bananas, fresh lychees, fresh longans and mangoes will destroy their color and nutritional value if stored in a low-temperature environment, resulting in huge waste. Another commonly used storage method is to use plastic wrap to preserve fresh vegetables and fruits. At present, the fresh-keeping films used in the market are PE and PP fresh-keeping films. Due to the low water vapor transmission rate of this kind of fresh-keepin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L71/02C08K13/02C08K3/38C08K5/053C08K3/22C08K5/00C08J5/18B65D65/38
CPCB65D65/38C08J5/18C08J2329/04C08J2471/02C08K2201/014C08L29/04C08L2201/06C08L2201/14C08L2203/16C08L71/02C08K13/02C08K3/38C08K5/053C08K2003/2241C08K5/0058
Inventor 周武艺李锦珍梁淦谷文祥刘威董先明许维田
Owner 广州怡馨舒生物科技有限公司
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