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Colorimetric food freshness intelligent indication label and preparation method thereof

A freshness and food technology, applied in stamps, instruments, identification devices, etc., can solve the problems of harmful raw material environment, biological indicator labels can not guarantee the color rendering effect and stability at the same time, and achieve the improvement of hydrophobicity, integrity and display. Color protection, high hydrophobic effect

Pending Publication Date: 2022-01-07
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art that the biological indicator label cannot guarantee the color rendering effect and stability at the same time, and the raw materials are harmful to the environment, and provide a colorimetric food freshness intelligent indicator label and its preparation method

Method used

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  • Colorimetric food freshness intelligent indication label and preparation method thereof
  • Colorimetric food freshness intelligent indication label and preparation method thereof
  • Colorimetric food freshness intelligent indication label and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Step 1: Put 0.5g of anthocyanin powder into a beaker, add 10ml of deionized water, and stir with a magnetic stirrer for 30 minutes at room temperature, so that the anthocyanin powder is fully mixed in deionized water to obtain an anthocyanin solution; 0.5 g of glycerin was added dropwise to 5 g of CNFs suspension, and then stirred at room temperature for 30 minutes to obtain a film-forming base solution; 0.8 ml of anthocyanin solution and 4 ml of film-forming base solution were mixed to obtain a mixed solution.

[0054] Step 2: Pour the mixed solution into a polytetrafluoroethylene mold to obtain a cellulose-anthocyanin porous film, such as image 3 shown.

[0055] Step 3: Prepare a waterproof and breathable layer of ADK micro-nano composite structure on the cellulose-anthocyanin porous film obtained in step 2 by embossing process, as follows:

[0056] Embossing scheme

[0057] Grind the block of alkyl ketene dimer (AKD) into powder; place the ground AKD powder on the P...

Embodiment 2

[0060] Step 1: Put 0.7g of anthocyanin powder into a beaker, add 10ml of deionized water, and stir with a magnetic stirrer for 45 minutes at room temperature, so that the anthocyanin powder is fully mixed in deionized water to obtain an anthocyanin solution; 0.8 g of glycerin was added dropwise to 5 g of CNFs suspension, and then stirred at room temperature for 30 minutes to obtain a film-forming base solution; 1.0 ml of anthocyanin solution and 4 ml of film-forming base solution were mixed to obtain a mixed solution.

[0061] Step 2: Pour the mixed solution into a polytetrafluoroethylene mold to obtain a cellulose-anthocyanin porous film, such as image 3 shown.

[0062] Step 3: Prepare a waterproof and breathable layer of ADK micro-nano composite structure on the cellulose-anthocyanin porous film obtained in step 2 by using 3D printing technology.

[0063] 3D printing solution

[0064] Take by weighing 10g alkyl ketene dimer (AKD) bulk body, put it into the agate mortar an...

Embodiment 3

[0066] Step 1: Put 1.5g of anthocyanin powder into a beaker, add 10ml of deionized water, and stir with a magnetic stirrer for 30 minutes at room temperature, so that the anthocyanin powder is fully mixed in deionized water to obtain an anthocyanin solution; 1.5 g of glycerin was added dropwise to 5 g of CNFs suspension, and then stirred at room temperature for 30 minutes to obtain a film-forming base solution; 1.2 ml of anthocyanin solution and 4 ml of film-forming base solution were mixed to obtain a mixed solution.

[0067] Step 2: Pour the mixed solution into a polytetrafluoroethylene mold to obtain a cellulose-anthocyanin porous film, such as image 3 shown.

[0068] Step 3: Prepare a waterproof and breathable layer of ADK micro-nano composite structure on the cellulose-anthocyanin porous film obtained in step 2 by embossing process, as follows:

[0069] Embossing scheme

[0070] Grind the block of alkyl ketene dimer (AKD) into powder; place the ground AKD powder on the...

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Abstract

The invention discloses a colorimetric food freshness intelligent indication label and a preparation method thereof, and belongs to the technical field of food intelligent packaging. The colorimetric food freshness intelligent indication label comprises a cellulose-anthocyanin porous film and an AKD hydrophobic structure, wherein a layer of hydrophobic structure is further prepared on the surface of the color development label by using an AKD material, and has a special surface appearance, and the hydrophobic structure has different patterns, such as grids, hemispheres and the like, at a micron level, has a vertical lamellar structure at a nano-scale structure, and has excellent hydrophobicity. According to the invention, the hydrophobic structure has gaps and does not completely cover the surface of the mixed film, so that the water vapor permeability and the color rendering property of the hydrophobic structure can be retained while the hydrophobic structure is hydrophobic; the hydrophobic structures are uniformly arranged, so that the hydrophobicity of the mixed film is improved, the integrity and the color rendering property of the label are protected, and the color rendering property and the water vapor permeability of the intelligent label are not influenced; and the intelligent label does not affect the color development effect and has a high hydrophobic effect.

Description

technical field [0001] The invention belongs to the technical field of food intelligent packaging, and relates to a colorimetric food freshness intelligent indicator label and a preparation method thereof. Background technique [0002] Fresh food is susceptible to physical, chemical and biological impacts during transportation, sales and storage, resulting in micro-corruption and affecting the quality of the product itself. Traditional packaging cannot monitor product quality changes in real time, resulting in product waste. Therefore, visual monitoring and detection of food quality status changes has become an urgent problem in the field of smart packaging. How to balance the sensor's function, size and preparation cost is the technical limitation to realize the application of visual food freshness intelligent indicator label in packaging products. [0003] Colorimetric sensors are a simple, efficient, and low-cost solution for visualizing food freshness parameters. Colo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09F3/02
CPCG09F3/0291
Inventor 安宁丽方长青秦靖萱薛文娜马利娥郭嘉鹏
Owner XIAN UNIV OF TECH
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