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Preparation method for water-absorbing anti-microbial preservative paper capable of indicating freshness of fresh food

A technology of freshness and fresh-keeping paper, which is applied in the fields of food preservation, fruit and vegetable preservation, food science, etc., to achieve the effect of broad application prospects.

Inactive Publication Date: 2015-12-23
TIANJIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no measure to allow consumers to intuitively observe the freshness of fresh food while maintaining the freshness of fresh food

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a water-absorbing antibacterial fresh-keeping paper capable of indicating the freshness of beef is characterized in that the following steps are adopted in sequence:

[0037] A. For fresh beef, bromocresol purple, which has a color change to the amines emitted by the food deterioration, is selected as the color-sensitive material;

[0038] B, select polyester fiber as raw material to make paper base material with water absorption function;

[0039] C, bromocresol violet is dissolved in 30% ethanol solution and form the bromocresol purple sensitive solution that concentration is 0.5mol / L for subsequent use;

[0040] D. For fresh beef, choose cinnamon essential oil which has antibacterial effect on the food;

[0041] E. Mix different cinnamon essential oils, pullulan, methylcellulose, glycerin and bromocresol purple sensitive solution at 40°C to make a coating solution; the specific dosage of each raw material is 0.1% cinnamon essential oil, 2% pu...

Embodiment 2

[0046] A method for preparing a water-absorbing antibacterial fresh-keeping paper capable of indicating the freshness of jujube is characterized in that the following steps are adopted in sequence:

[0047] A. For fresh jujubes, choose methyl red bromothymol blue-sensitive materials that have a color change to the carbon dioxide gas emitted by the food deterioration;

[0048] B, select the reed fiber as raw material to make the paper base material with water absorption function;

[0049] C, methyl red and bromothymol blue are dissolved in 80% ethanol solution respectively to make the methyl red bromothymol blue sensitive solution that concentration is 0.1mol / L;

[0050] E. For fresh jujube, select tea tree essential oil which has antibacterial effect on the food;

[0051] F. Mix tea tree essential oil, methyl cellulose, sodium hexametaphosphate, sorbitol, and methyl red bromothymol blue sensitive solution at 50°C to make a coating solution; the specific amount of each raw mat...

Embodiment 3

[0056] A method for preparing a water-absorbing antibacterial fresh-keeping paper capable of indicating the freshness of eggs is characterized in that the following steps are sequentially adopted:

[0057] A. For fresh eggs, lead acetate, which has a color change to the hydrogen sulfide substances emitted by the food deterioration, is selected as the color-sensitive material;

[0058] B, select polyester fiber as raw material to make paper base material with water absorption function;

[0059] C, dissolving lead acetate in water to form concentration is the lead acetate color sensitive solution of 0.5mol / L for subsequent use;

[0060] D. For fresh eggs, choose geranium essential oil which has antibacterial effect on the food;

[0061] E. Mix different geranium essential oils, pullulan, methylcellulose, glycerin and bromocresol purple sensitive solution at 40°C to make a coating solution; the specific dosage of each raw material is 0.1% of cinnamon essential oil, 2% pullulan,...

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Abstract

The invention discloses a preparation method for water-absorbing anti-microbial preservative paper capable of indicating freshness of fresh food. The preparation method comprises the following steps: (A) selecting color-sensitizing materials; (B) selecting a paper-based material with a water-absorbing function; (C) respectively dissolving different color-sensitizing materials into corresponding solvents, thereby forming color-sensitizing solutions for later use; (D) selecting different essential oils having anti-microbial effect to the fresh food; (E) uniformly mixing the different essential oils, coating agents, dispersing agents, color-sensitizing accelerants and the color-sensitizing solutions at 20-60 DEG C, thereby forming coating solutions; and (F) uniformly coating the paper-based material prepared from step (B) by the coating solutions by utilizing a coating machine, and then drying, thereby acquiring the water-absorbing anti-microbial preservative paper capable of indicating freshness of fresh food. The preservative paper prepared according to the preparation method provided by the invention not only has the fresh-keeping functions, such as seeping juice absorption and antibiosis, but also can directly indicate the freshness of fresh food. The preservative paper can be used together with the present food packaging, is convenient and practical and has wide application prospect.

Description

technical field [0001] The invention relates to the technical field of food preservation, in particular to a method for preparing a water-absorbing and antibacterial fresh-keeping paper capable of indicating the freshness of fresh food. Background technique [0002] At present, with the attention of food safety in China and even the whole world, fresh food preservation technology has also been developed rapidly. In addition to traditional low-temperature preservation, chemical preservation, biological preservation, modified atmosphere preservation, ultra-high pressure preservation, irradiation preservation, ozone preservation and other preservation technologies, some new preservation technologies, including composite preservation technologies, have emerged in recent years, such as critical point Low-temperature and high-humidity storage, high-voltage electrostatic field treatment for preservation, intercellular water structured controlled atmosphere preservation, heat shock ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23L3/3463A23B7/154
CPCA23L3/3463A23B7/154
Inventor 胡云峰陈君然崔翰元梁晶
Owner TIANJIN UNIV OF SCI & TECH
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