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Color changing smart label

A smart label and indicator technology, applied in the direction of color-changing fluorescent materials, physical/chemical change thermometers, instruments, etc., can solve the problems of poor dynamic adjustable range, single color change, large volume, etc., to achieve small size, The effect of smaller volume and lower cost

Inactive Publication Date: 2019-05-10
BEIJING LANTSAI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this type of TTI is often limited in its use due to its large size, single color change, poor dynamic adjustable range, and high cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] Using the following recipe and procedure, a self-evolving color-changing indicator was prepared.

[0148] formula:

[0149]

[0150] Note 1: The standard concentration of gold nanorod solution is prepared by dispersing gold nanorods in cetyltrimethylammonium chloride solution (0.010M), its extinction peaks are at 508nm and 825nm, and the optical density at 508nm 10.000cm -1 , the optical density at 825nm is 44.000cm -1 . The same below.

[0151] Note 2: The standard concentration of silver chloride suspension is obtained by mixing equal masses of cetyltrimethylammonium chloride solution (concentration: 0.116M) and silver nitrate (concentration: 0.100M) solution. The same below.

[0152] operate:

[0153] 1) At a reaction temperature of 35°C, gold nanorod solution (standard concentration, 0.4000g), cetyltrimethylammonium chloride (0.100M, 0.5000g), cetyltrimethylammonium bromide (0.001M, 0.4000 g), ascorbic acid (0.100M, 0.1000g) are fully mixed to obtain a col...

Embodiment 2

[0159] Using the same recipe and operation as in Example 1, the self-evolving color indicator was prepared at a reaction temperature of 5°C.

[0160] Place the prepared self-evolving color indicator in a constant temperature environment at 5°C, and measure its extinction spectrum every 24 hours. The results are as follows: Figure 2A with 2B shown.

[0161] It can be seen from the spectral results that, compared with Example 1, when the ambient temperature decreases (from 35°C to 5°C), the self-evolving color-changing process of the self-evolving color-changing indicator slows down.

Embodiment 3

[0163] Using the following recipe and the same operation as in Example 1, a self-evolving color indicator was prepared.

[0164] formula:

[0165]

[0166]

[0167] Place the prepared self-evolving color indicator in a constant temperature environment of 35°C, measure its extinction spectrum every 1.0h, and the results are as follows: Figure 3A with 3B shown.

[0168] As can be seen from the spectral results, compared with Example 1, when the concentration of ascorbic acid decreased (use amount was reduced to 0.0500g from 0.1000g), the self-evolving color-changing process of the self-evolving color-changing indicator slowed down.

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Abstract

The invention provides a smart label composed of a self-evolving color-changing indicator, which is combined with product packaging in a specific way. The smart label may include isolating and mixing devices to synchronize the start time of the self-evolving color change reaction with the production time of the product. In addition, the smart label according to the present invention may include two or more self-evolving color-changing indicators with different specific components. Furthermore, through the specific arrangement sequence of multiple self-evolving color-changing indicators, a progress bar-style smart label can be made to read the remaining shelf life of the product more intuitively and accurately.

Description

technical field [0001] The present invention relates to an intelligent label comprising a self-evolving color-changing indicator for indicating the shelf life of perishable products. Background technique [0002] The safety of perishable products such as food and pharmaceuticals has always been the focus of attention. In order to prevent such products from being unsuitable for consumption or unable to achieve their due effects due to microbial reproduction or deterioration of active ingredients, the shelf life (or expiration date, etc.) is usually marked to indicate the time period when it is in the qualified quality stage. However, such shelf life (or expiration date, etc.) is usually estimated based on several oversimplified factors (including certain temperature, humidity, atmosphere, packaging, etc.), and in practice, it is often due to changes in storage conditions, especially temperature increases, And can not guarantee the safety of food and medicine within the calib...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/14G01K11/16C09K9/00
CPCG01K11/14G01K11/16C09K9/00
Inventor 张超田子健郭占云
Owner BEIJING LANTSAI TECH CO LTD
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