Preparation method of freshness-retaining packaging film with antibacterial and antioxidant function

A fresh-keeping packaging and anti-oxidation technology, applied in the field of food packaging materials, can solve problems such as toxic and side effects, and achieve the effects of reducing environmental damage, good safety, and reducing the total number of colonies

Inactive Publication Date: 2014-12-24
ANHUI SCI & TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, materials such as protein and starch are prone to breed microorganisms, and some packaged materials are prone to various oxidation reactions. Therefore, fresh-keeping packaging films with antibacterial and anti-oxidation functions will be favored by people.
However, because synthetic antibacterial agents and antioxidants have certain toxic and side effects, with the enhancement of people's safety awareness, more and more attention has been paid to natural, non-toxic antibacterial and antioxidant materials.

Method used

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  • Preparation method of freshness-retaining packaging film with antibacterial and antioxidant function

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Experimental program
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Effect test

Embodiment 1

[0027] A method for preparing a fresh-keeping packaging film with antibacterial and anti-oxidative functions, the fresh-keeping packaging film comprises the following components by mass: 5 parts of zein, 5 parts of active calcium, 88.5 parts of 80% ethanol, glycerin 1 part, clove oil 0.5 part. Specific steps are as follows:

[0028] (1) Preparation of zein solution: dissolve zein in 80% ethanol, stir to make it fully dissolve, and obtain zein solution;

[0029] (2) Preparation of active calcium hydrate: Calcinate the wastes in the food industry production process, such as egg shells and shells, at 1000°C for 3 hours to obtain active calcium with a particle size below 50 μm, and add a small amount of water to the active calcium In, make it absorb water, get active calcium hydrate;

[0030] (3) Add plasticizer and vegetable essential oil: mix zein solution and active calcium hydrate to obtain a mixed solution, then add glycerin and clove oil to the mixed solution, and mix to o...

Embodiment 2

[0038] A method for preparing a fresh-keeping packaging film with antibacterial and anti-oxidative functions, the fresh-keeping packaging film includes the following components in parts by mass: 10 parts of zein, 10 parts of active calcium, 77.5 parts of 80% ethanol, and 2 parts of alcohol, 0.5 part of mustard oil. Specific steps are as follows:

[0039] (1) Preparation of zein solution: dissolve zein in 80% ethanol, stir to make it fully dissolve, and obtain zein solution;

[0040] (2) Preparation of active calcium hydrate: Calcining the waste in the food industry production process, eggshells, shells, etc. at 1200 ° C for 2 hours to obtain active calcium, the particle size is below 50 μm, and adding a small amount of water to the active calcium In, make it absorb water, get active calcium hydrate;

[0041] (3) Adding plasticizer and plant essential oil: mixing zein solution and active calcium hydrate to obtain a mixed solution, then adding sorbitol and mustard oil to the m...

Embodiment 3

[0049] A method for preparing a fresh-keeping packaging film with antibacterial and anti-oxidative functions, the fresh-keeping packaging film includes the following components in parts by mass: 5 parts of zein, 20 parts of active calcium, 73 parts of 80% ethanol, glycerin 1.5 parts, oregano oil 0.5 parts. Specific steps are as follows:

[0050] (1) Preparation of zein solution: dissolve zein in 80% ethanol, stir to make it fully dissolve, and obtain zein solution;

[0051] (2) Preparation of active calcium hydrate: the waste in the food industry production process, eggshells, shells, etc., is calcined at 900 ° C for 3 hours to obtain active calcium, the particle size is below 50 μm, and a small amount of water is added to the active calcium to absorb water to obtain active calcium hydrate;

[0052] (3) Add plasticizer and vegetable essential oil: mix zein solution and active calcium hydrate to obtain a mixed solution, then add glycerin and oregano oil to the mixed solution,...

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Abstract

The invention discloses a preparation method of a freshness-retaining packaging film with an antibacterial and antioxidant function. The preparation method comprises the followings steps: (1) dissolving 5-10 parts by mass of zein into 70-90 parts by mass of 80% alcohol and stirring for sufficiently dissolving so as to obtain a zein liquid; (2) adding a small amount of water into 5-25 parts by mass of active calcium to obtain an active calcium hydrate; (3) mixing the zein liquid with the active calcium hydrate to obtain a mixed liquid, adding 1-2 parts by mass of a plasticizer and 0.2-2 parts by mass of plant essential oil into the mixed liquid to obtain a film liquid; (4) ultrasonically homogenizing and refining; (5) degassing; (6) performing tape casting; and (7) drying and uncovering the film. The freshness-retaining packaging film prepared by the preparation method has excellent antibacterial property and antioxidant property, strong mechanical performance and high barrier property, and is easily available in raw materials, simple and easy in processing process, low in cost, free of toxicity and good in safety.

Description

technical field [0001] The invention belongs to the technical field of food packaging materials, and in particular relates to a preparation method of a fresh-keeping packaging film with antibacterial and antioxidative functions. Background technique [0002] Plastic is a kind of material with polymer resin as the main material. After adding various additives, it has ductility under certain temperature and pressure, and can fix its shape after cooling. Plastic has become the preferred material for packaging due to its soft texture, good transparency and convenient use. However, the waste of resources caused by plastic packaging materials and the environmental pollution caused by refractory degradation and disposal are becoming more and more serious. The packaging of food and pharmaceuticals puts forward higher requirements. Environmentally friendly biopolymer materials made of natural polymers are gaining more and more attention. Among them, edible films and degradable film...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L89/00C08K3/26C08K5/00
Inventor 张继武杜传来华平郑海波
Owner ANHUI SCI & TECH UNIV
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