Cold accumulating agent and preparation method thereof

A technology of cold storage agent and thickener, which is used in chemical instruments and methods, materials for heat exchange, etc.

Inactive Publication Date: 2015-09-23
SHANDONG PROVINCIAL HOSPITAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are mainly two types of cold storage agent ice packs used clinically: one is sodium chloride ice packs, which have high hardness and small contact area with local tissues on the body surface, making it difficult to fix, and the low temperature maintenance time is short, requiring frequent replacement; The other is a self-cooling ice bag, which is composed of two raw materials, crystalline sodium carbonate and ammonium nitrate, which are added with water, and are placed in a sealed bag in the middle. The horizontal clip is removed to mix the two raw materials, and an endothermic reaction occurs to achieve the cooling effect. This type of ice pack can only be used once, which wastes raw materials, and it is easy to damage the horizontal clamp during the handling process, which will cause the ice pack to lose its effect and cause inconvenience in transportation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A cold storage agent in this embodiment, the mass percentage content of each component is: glycerol is 2%, inulin is 2%, gelatin is 1%, sodium alginate is 2%, and the balance is that the mass fraction is 15%. aqueous sodium chloride solution.

[0029] (1) Heat the sodium chloride aqueous solution with a mass fraction of 15% in a water bath to 70°C and keep the temperature constant to perform the following operations;

[0030] (2) Add sodium alginate to the sodium chloride aqueous solution in step (1), and stir while adding, so that the sodium alginate is completely dissolved and uniform;

[0031] (3) Add gelatin to the solution in step (2), and stir rapidly while adding, so that the gelatin is completely dissolved and evenly distributed;

[0032] (4) Add inulin to the mixed solution obtained in step (3), and stir while adding, so that the inulin is also completely dissolved and uniform, and a viscous colloidal mixed solution is obtained.

[0033] (5) Add glycerol to t...

Embodiment 2

[0036] A cold storage agent in this embodiment, the mass percentage content of each component is: glycerol is 5%, inulin is 5%, gelatin is 4%, sodium alginate is 5%, and the balance is that the mass fraction is 20%. aqueous sodium chloride solution. According to the steps in Example 1, the cool storage agent of this example was prepared.

[0037] Put the cold storage agent in a -20°C refrigerator for 12 hours, and cool it for later use. The phase change latent heat and phase change temperature of solutions with different concentrations were measured with a DSC thermal analyzer, and the phase change latent heat of the cold storage agent in this embodiment was measured to be 242Kj / Kg, and the phase change temperature was 4°C.

Embodiment 3

[0039] A cold storage agent in this embodiment, the mass percentage content of each component is: glycerol is 3%, inulin is 2%, gelatin 1%, sodium alginate 3%, ammonium chloride 10%, the balance It is an aqueous sodium chloride solution with a mass fraction of 20%. According to the steps in Example 1, the cool storage agent of this example was prepared.

[0040] Put the cold storage agent in a -20°C refrigerator for 12 hours, and cool it for later use. The phase change latent heat and phase change temperature of solutions with different concentrations were measured with a DSC thermal analyzer, and the phase change latent heat of the cold storage agent in this embodiment was measured to be 273Kj / Kg, and the phase change temperature was 4°C.

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Abstract

The invention provides a cold accumulating agent and a preparation method thereof. The cold accumulating agent is composed of, by mass, 1%-8% of glycerol, 1%-5% of inulin, 1%-5% of gelatin, 1%-5% of thickening agent and a sodium chloride water solution. When the cold accumulating agent is prepared, the sodium chloride water solution is heated in a bath to be at the temperature of 70 DEG C, the temperature is kept constant, sodium alginate tech grade, gelatin, inulin and glycerol are sequentially added into the sodium chloride water solution, adding and stirring are performed at the same time when each component is added, and the next component is added after the added component is dissolved evenly; after all the components are added, uniform stirring is performed, the temperature is kept constant for 10 min, and cooling is performed to obtain the cold accumulating agent. The cold accumulating agent can be used repeatedly, and is thick, colloidal, good in fitness, large in latent heat, long in low-temperature duration time, easy to manufacture, low in cost, safe and free of toxicity.

Description

technical field [0001] The invention relates to a cold storage agent, in particular to a cold storage agent specially used in clinical cold compress therapy. The present invention also includes its preparation method. Background technique [0002] Cold storage agent is a translucent (or opaque), viscous jelly-like mixture composed of organic or (and) inorganic compounds, which can absorb and store a large amount of cold energy at low temperatures, and can release a large amount of cold energy at higher temperatures. Cooling capacity, to maintain a low temperature environment in and around a small range for a long time, and cold storage agents are widely used in cold compress therapy. Cold compress therapy is to place a cold object on a certain part of the human body to shrink the local capillaries and relieve local vascular congestion. It has the functions of anti-inflammatory, hemostasis, pain relief, skin heat dissipation, and lowering body temperature, so as to achieve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 侯亚丽张东升李凤霞张卫东马红芳
Owner SHANDONG PROVINCIAL HOSPITAL
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