Temperature sensing material for cold chain tracking

Abstract

The invention discloses a temperature sensing material for cold chain tracking. The temperature sensing material comprises a color developing agent and an indicator, wherein the indicator is melted at a specific temperature to enable the color of the color developing agent to change. The temperature sensing material for cold chain tracking is at least capable of realizing tracking management on a cold chain.

Description

technical field

[0001] The invention relates to an intelligent material, in particular to a temperature sensing material used for cold chain tracking. Background technique

[0002] Food cold chain process safety management is a very important part of food safety management, and it is also the most difficult part to deal with all related issues of food safety and quality.

[0003] Food cold chain management involves production companies, logistics companies, transportation companies, and sales companies. When there is no problem in any chain of the cold chain; when there is a problem in any link, it is difficult to get timely traceability, often in food When eating, there have been problems such as preservation period or thawing, so I know that there is a problem in a certain link before, but it is still difficult to locate. For example, when a consumer buys a box of thawed and refrozen food in a supermarket, it is also difficult for the supermarket to trace whether the food...

Examples

Embodiment 1

[0071] Provide a smart article code that produces a color reaction at -63.5°C: the indicator includes iodine-containing solid particles, and the iodine-containing solid particles are ground from iodine in chloroform solution after quick freezing at -80°C , the developer includes starch. The principle is that when the ambient temperature is -63.5°C, chloroform melts, and iodine is precipitated at this time, thereby enabling a color reaction to occur with starch.

[0072] according to figure 1 Shown is a method for making a temperature change identification area in a temperature-sensitive smart item code for cold chain tracking according to a preferred embodiment of the present invention, the making of a temperature-sensitive smart item code for cold chain tracking method, including the steps in turn:

[0073] S1001 Make a chloroform solution of iodine: the melting point of chloroform is -63.5°C, at a temperature higher than the melting point of chloroform (such as -60°C), dis...

Embodiment 2

[0082] A code for an intelligent article that produces a color reaction at -10°C is provided: the indicator includes ice crystals of sodium chloride solution, and the color developer includes anhydrous copper sulfate. The principle is that when the ambient temperature is -10°C, sodium chloride melts, and water precipitates out at this time, so that a color reaction can occur with anhydrous copper sulfate.

[0083] according to figure 2 Shown is a method for making a temperature change identification area in a temperature-sensitive smart item code for cold chain tracking according to a preferred embodiment of the present invention, the making of a temperature-sensitive smart item code for cold chain tracking method, including the steps of:

[0084] S2001 Steps for making sodium chloride solution: Mix analytically pure sodium chloride and distilled water to prepare a 0.1mol / l sodium chloride solution.

[0085] Steps of S2002 quick-freezing and grinding: quick-freeze the sodiu...

Embodiment 3

[0090] An intelligent article code that undergoes a color reaction at 0°C is provided: the indicator includes ice crystals, and the ice crystals are ground from ice cubes at an ambient temperature lower than 0°C. The color developer includes any one of the following: anhydrous copper sulfate, color-changing silica gel and basic fuchsin.

[0091] Basic fuchsin is a green metallic crystal, soluble in ethanol and amyl alcohol, slightly soluble in water, the solution is red, insoluble in ether; the maximum absorption wavelength (in ethanol) is 543nm (ε93000).

[0092] Color-changing silica gel is to add some inorganic salts with crystal water and a small amount of silicon dichloride, such as cobalt salt, to silica gel. When there is no water, the state is blue when it loses crystal water, and when it absorbs water, it is pink when it is crystal water. Color-changing silica gel can be recycled. When there is a color change, it can be baked in a drying oven to return to an anhydro...

technical field

[0001] The invention relates to an intelligent material, in particular to a temperature sensing material used for cold chain tracking. Background technique

[0002] Food cold chain process safety management is a very important part of food safety management, and it is also the most difficult part to deal with all related issues of food safety and quality.

[0003] Food cold chain management involves production companies, logistics companies, transportation companies, and sales companies. When there is no problem in any chain of the cold chain; when there is a problem in any link, it is difficult to get timely traceability, often in food When eating, there have been problems such as preservation period or thawing, so I know that there is a problem in a certain link before, but it is still difficult to locate. For example, when a consumer buys a box of thawed and refrozen food in a supermarket, it is also difficult for the supermarket to trace whether the food...

Examples

Embodiment 1

[0071] Provide a smart article code that produces a color reaction at -63.5°C: the indicator includes iodine-containing solid particles, and the iodine-containing solid particles are ground from iodine in chloroform solution after quick freezing at -80°C , the developer includes starch. The principle is that when the ambient temperature is -63.5°C, chloroform melts, and iodine is precipitated at this time, thereby enabling a color reaction to occur with starch.

[0072] according to figure 1 Shown is a method for making a temperature change identification area in a temperature-sensitive smart item code for cold chain tracking according to a preferred embodiment of the present invention, the making of a temperature-sensitive smart item code for cold chain tracking method, including the steps in turn:

[0073] S1001 Make a chloroform solution of iodine: the melting point of chloroform is -63.5°C, at a temperature higher than the melting point of chloroform (such as -60°C), dis...

Embodiment 2

[0082] A code for an intelligent article that produces a color reaction at -10°C is provided: the indicator includes ice crystals of sodium chloride solution, and the color developer includes anhydrous copper sulfate. The principle is that when the ambient temperature is -10°C, sodium chloride melts, and water precipitates out at this time, so that a color reaction can occur with anhydrous copper sulfate.

[0083] according to figure 2 Shown is a method for making a temperature change identification area in a temperature-sensitive smart item code for cold chain tracking according to a preferred embodiment of the present invention, the making of a temperature-sensitive smart item code for cold chain tracking method, including the steps of:

[0084] S2001 Steps for making sodium chloride solution: Mix analytically pure sodium chloride and distilled water to prepare a 0.1mol / l sodium chloride solution.

[0085] Steps of S2002 quick-freezing and grinding: quick-freeze the sodiu...

Embodiment 3

[0090] An intelligent article code that undergoes a color reaction at 0°C is provided: the indicator includes ice crystals, and the ice crystals are ground from ice cubes at an ambient temperature lower than 0°C. The color developer includes any one of the following: anhydrous copper sulfate, color-changing silica gel and basic fuchsin.

[0091] Basic fuchsin is a green metallic crystal, soluble in ethanol and amyl alcohol, slightly soluble in water, the solution is red, insoluble in ether; the maximum absorption wavelength (in ethanol) is 543nm (ε93000).

[0092] Color-changing silica gel is to add some inorganic salts with crystal water and a small amount of silicon dichloride, such as cobalt salt, to silica gel. When there is no water, the state is blue when it loses crystal water, and when it absorbs water, it is pink when it is crystal water. Color-changing silica gel can be recycled. When there is a color change, it can be baked in a drying oven to return to an anhydro...

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