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Color-changing smart label

A smart label and indicator technology, applied in the direction of color-changing fluorescent materials, thermometers with physical/chemical changes, measuring devices, etc., can solve the problems of poor dynamic adjustable range, single color change, large volume, etc., and achieve small volume , Smaller size and lower cost

Inactive Publication Date: 2017-09-01
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] The self-evolving color change indicator was prepared using the following recipe and procedure.

[0148] formula:

[0149]

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

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

[0152] operate:

[0153] 1) At the reaction temperature of 35°C, mix the gold nanorod solution (standard concentration, 0.4000g), cetyltrimethylammonium chloride (0.100M, 0.5000g), cetyltrimethylammonium bromide (0.001M, 0.4000 g) and ascorbic acid (0.100M, 0.1000 g) were thoroughly m...

Embodiment 2

[0159] Using the same formulation and procedure as in Example 1, the self-evolving color change indicator was formulated at a reaction temperature of 5°C.

[0160] The prepared self-evolving color change indicator was placed in a constant temperature environment of 5 °C, and its extinction spectrum was measured every 24 hours. The results are as follows: Figure 2A and 2B shown.

[0161] It can be seen from the spectral results that, compared with Example 1, when the ambient temperature is lowered (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 formulation and the same procedure as in Example 1, an auto-evolving color change indicator was prepared.

[0164] formula:

[0165]

[0166]

[0167] The prepared self-evolving color change indicator was placed in a constant temperature environment of 35 °C, and its extinction spectrum was measured every 1.0 h, and the results were as follows: Figure 3A and 3B shown.

[0168] It can be seen from the spectral results that, compared with Example 1, when the ascorbic acid concentration is reduced (the usage amount is reduced from 0.1000g to 0.0500g), the self-evolving color changing process of the self-evolving color changing indicator slows down.

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Abstract

The present invention provides a smart label consisting of self-evolving color-changing indicators. The smart label can be combined with a product package in a particular manner. The smart label may comprise an isolating and mixing device so as to achieve the synchronization of self-evolving color-changing reaction start time and the production time of a product. The smart label of the present invention may comprise two or more self-evolving color-changing indicators with different specific compositions; and the progress bar type smart label can be made through the specific arrangement sequence of the plurality of self-evolving color-changing indicators, and the remaining warranty period of the product can be read more intuitively and accurately.

Description

technical field [0001] The present invention relates to a smart label including a self-evolving color changing indicator, which is used to indicate the shelf life of perishable products. Background technique [0002] The safety of perishable products such as food and medicine has always been the focus of attention. In order to prevent such products from being unfit for consumption or failing 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 for which it is in the quality-qualified stage. However, such shelf life (or expiration date, etc.) is usually estimated based on a number of oversimplified factors (including determined temperature, humidity, atmosphere, packaging, etc.), and in practice often due to changes in storage conditions, especially temperature increases, And can not guarantee the safety of food and medicine within the calibra...

Claims

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Application Information

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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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