Fixed shape phase-change material based on tetradecane and method for producing the same

A technology of shape-setting phase change material and tetradecane, applied in the field of materials, can solve problems such as inconvenience of direct application, and achieve the effect of convenient application

Active Publication Date: 2009-05-06
FIELD OPERATION BLOOD TRANSFUSION INST OF PLA SCI ACAD OF MILITARY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since tetradecane is liquid at room temperature, direct application is very inconvenient

Method used

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  • Fixed shape phase-change material based on tetradecane and method for producing the same
  • Fixed shape phase-change material based on tetradecane and method for producing the same
  • Fixed shape phase-change material based on tetradecane and method for producing the same

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preparation example Construction

[0025] The preparation method of the fixed-shape phase-change material involved in the present invention is:

[0026] (1) Dry PE and thermoplastic elastomer at 60-80°C for 6-12 hours, then cool to room temperature. Mix the two together with C14 and cross-linking agent in proportion, and place them at room temperature for 24 hours.

[0027] (2) Reactively extrude the mixing system of (1) in a screw extruder. The temperature of each section of the extruder from the feeding port, the barrel to the head is 130-150°C, 140-150°C and 130-150°C respectively.

[0028] (3) Extruded profiles (including but not limited to plates) are cooled after being coated with EVOH (ethylene-vinyl alcohol copolymer) film.

[0029] According to different material formulations, the present invention can prepare hard boards and soft coils respectively to meet different application requirements.

Embodiment 1

[0031] (1) Dry 40kg of PE and 27kg of SBS at 80°C for 6 hours, then cool to room temperature. And mix well with 30kg of C14 and 3kg of BPO, and leave it at room temperature for 24 hours.

[0032] (2) Extrude the mixture of (1) in a twin-screw extruder. The temperature of each section of the extruder is respectively: feeding port 150°C, barrel 150°C, head 150°C.

[0033] (3) Extrude the surface of the plate to coat the EVOH film and then cool to obtain a hard plate-shaped phase-change material.

Embodiment 2

[0035] (1) Dry 20 kg of SIS at 60°C for 8 hours, then cool to room temperature. And mix evenly with 80 kg of C14, leave it at room temperature for 24 hours.

[0036] (2) Extrude the mixture of (1) in a twin-screw extruder. The temperature of each section of the extruder is respectively: feeding port 130°C, barrel 150°C, head 130°C.

[0037] (3) Coating EVOH film on the surface of the extruded plate and cooling to obtain a soft shape-setting phase change material coil.

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Abstract

The invention discloses a figuration phase change material based on tetradecane. The figuration phase change material is formed by mixing and processing the tetradecane with the mass percentage between 30 and 80 percent and the balance being a polymer framework material, wherein the polymer framework material is one or a combination of polyethylene (PE), styrene-butadiene-styrene copolymer (SBS) or styrene-isoprene-styrene copolymer (SIS). The invention has the tetradecane absorbed and/or wrapped in the specific polymer material as a framework. Because the polymer material as the framework can not be deformed in the working temperature range (20 below zero to 40 DEG C for example) of the tetradecane, the shape of the material can be kept, and the problems about collapse or flowing and leakage can not occur. Therefore, the obtained figuration phase change material can be widely applied to the low-temperature preservation and transportation of medicines, foods and the like.

Description

Technical field: [0001] The invention relates to the field of materials, in particular to a phase change material capable of solid-liquid change within a certain temperature range. Background technique: [0002] During the transportation of medicines (including blood, drugs, vaccines, etc.) and food, it is often necessary to maintain a constant temperature to prevent the medicine from becoming invalid or the food from going bad. For cryopreservation, materials such as dry ice and crystalline salt are usually used to keep low temperature under the condition of no power supply at present, but these materials have a fast cooling rate, it is difficult to maintain a temperature balance state, and the holding time is short; and dry ice is a one-time consumption Product, not reusable. On the other hand, when the ambient temperature is lower than 0°C, and some blood and other medical products and foods are required to be stored in the temperature range of 0°C to 10°C, dry ice and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K5/06
Inventor 王艳杨睿韩颖王捷熙刘敏霞权国波刘安
Owner FIELD OPERATION BLOOD TRANSFUSION INST OF PLA SCI ACAD OF MILITARY
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