Formamide shaped phase change material
By combining methylamide with thickening agent and thermal padding, preparing metamide fixed phase transformer materials, solving the problem of high cost and low density of the existing paraffin material, and realizing high safety and good thermal conductivity 0-8 ℃ Materials.
Patent Information
- Application Number
- CN202411502024.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-25
- Publication Date
- 2025-01-28
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The existing 0-8°C phase change materials are mainly paraffin wax, which is relatively expensive and has low density, resulting in a decrease in volume phase change enthalpy.
Thylide is used as a 0 ~ 8 ℃ phase transformer material. By binding with thickening agent and heat conduction, it is prepared to prepare methalmamienal phase transformer materials to improve its safety and thermal conductivity.
By using the low cost and efficient phase change characteristics of metamamide, the 0-8 ° C phase transformer material with high safety and good thermal conductivity replaces expensive paraffin materials.
Smart Images
Figure CN119371939A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of phase change materials, and in particular to a formamide-shaped phase change material. Background Art
[0002] Phase change material refers to a material that changes its material state and provides latent heat without changing the temperature. The process of changing physical properties is called phase change. At this time, the phase change material will absorb or release a large amount of latent heat. The phase change material has the ability to change its physical state within a certain temperature range. Taking solid-liquid phase change as an example, when heated to the melting temperature, a phase change from solid to liquid occurs. During the melting process, the phase change material absorbs and stores a large amount of latent heat; when the phase change material is cooled, the stored heat must be dissipated to the environment within a certain temperature range, and a reverse phase change from liquid to solid is performed. In these two phase change processes, the energy stored or released is called phase change latent heat. When the physical state changes, the temperature of the material itself remains almost unchanged before the phase change is completed, forming a wide temperature platform. Although the temperature remains unchanged, the latent heat absorbed or released is quite large.
[0003] The 0-8℃ phase change material has application value in biology, medicine, fresh food, etc. The existing 0-8℃ phase change material is mainly paraffin. However, paraffin is relatively expensive and has a low density, which leads to a decrease in the volume phase change enthalpy. Summary of the invention
[0004] In view of the fact that the existing 0-8°C phase change material is mainly paraffin, which is relatively expensive and has a low density, resulting in a decrease in volume phase change enthalpy, the present invention is proposed.
[0005] Therefore, the purpose of the present invention is to provide a formamide-shaped phase change material, the purpose of which is: by utilizing the common organic compound formamide, which has a melting point of 2 to 3°C, a flash point of 154°C, and a cost much lower than paraffin, it can be used as a 0 to 8°C phase change material, and then the polymer and formamide support gel can be used to avoid leakage and significantly improve its safety. In addition, thermal conductivity is enhanced by using thermal conductive fillers, which is beneficial to heat transfer.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a formamide-shaped phase change material, comprising the following components:
[0007] 100 parts of formamide;
[0008] Thickener 5-15 parts;
[0009] Thermally conductive filler 2-30 parts.
[0010] As a preferred embodiment of the formamide-setting phase change material of the present invention, the thickener comprises one of polyvinyl alcohol, methyl cellulose, ethyl cellulose and hydroxyethyl cellulose.
[0011] As a preferred embodiment of the formamide-shaped phase change material of the present invention, the thermally conductive filler comprises one of flake graphite and expanded graphite.
[0012] To achieve the above object, the present invention provides the following technical solution: a method for preparing a formamide-shaped phase change material, comprising the following steps:
[0013] S1, firstly, heating formamide to 60-120°C and stirring;
[0014] S2, then adding the thickener to the heated formamide in S1, and then continuing to stir until the thickener is completely dissolved;
[0015] S3, then adding the thermal conductive filler to the mixture of formamide and thickener in S2 and mixing them;
[0016] S4, finally pouring the mixture in S4 into a storage tank and cooling it to obtain a non-leaking fixed phase change material.
[0017] The beneficial effects of the present invention are as follows: by utilizing the common organic compound formamide, which has a melting point of 2 to 3°C, a flash point of 154°C, and a cost much lower than paraffin, it can be used as a 0 to 8°C phase change material, and then the polymer and formamide can be made into a gel to avoid leakage and significantly improve its safety. In addition, thermal conductivity is enhanced by using thermal conductive fillers, which is beneficial to heat transfer. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:
[0019] Figure 1 This is a schematic diagram of the DSC test results of Example 1 of the formamide-fixed phase change material of the present invention.
[0020] Figure 2 This is a schematic diagram of the DSC test results of Example 2 of the formamide-fixed phase change material of the present invention.
[0021] Figure 3 This is a schematic diagram of the DSC test results of Example 3 of the formamide-fixed phase change material of the present invention. DETAILED DESCRIPTION
[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.
[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0024] Example 1
[0025] Reference Figure 1 , which is the first embodiment of the present invention, provides a formamide-fixed phase change material, and the formamide-fixed phase change material includes the following components:
[0026] 100 parts of formamide;
[0027] Thickener 8 parts;
[0028] 2 parts of thermal conductive filler.
[0029] The thickener is ethyl cellulose.
[0030] The thermally conductive filler is expanded graphite.
[0031] A method for preparing a formamide-shaped phase change material comprises the following steps:
[0032] S1, firstly, heating formamide to 60-120°C and stirring;
[0033] S2, then adding the thickener to the heated formamide in S1, and then continuing to stir until the thickener is completely dissolved;
[0034] S3, then adding the thermal conductive filler to the mixture of formamide and thickener in S2 and mixing them;
[0035] S4, finally pouring the mixture in S4 into a storage tank and cooling it to obtain a non-leaking fixed phase change material.
[0036] DSC test results of the prepared phase change material Figure 1 .
[0037] Example 2
[0038] Reference Figure 1-2 , which is the second embodiment of the present invention, and which is different from the first embodiment in that it includes the following components:
[0039] 100 parts of formamide;
[0040] Thickener 10 parts;
[0041] 10 parts of thermal conductive filler.
[0042] The thickener is methyl cellulose.
[0043] The thermally conductive filler is flake graphite.
[0044] DSC test results of the prepared phase change material Figure 2 .
[0045] The remaining structures are the same as those of Example 1.
[0046] Example 3
[0047] Reference Figure 1-3 , which is the third embodiment of the present invention, and which is different from the second embodiment in that it includes the following components:
[0048] 100 parts of formamide;
[0049] Thickener 5 parts;
[0050] 5 parts of thermal conductive filler.
[0051] The thickener is hydroxyethyl cellulose.
[0052] The thermally conductive filler is expanded graphite.
[0053] DSC test results of the prepared phase change material Figure 3 .
[0054] The remaining structure is the same as that of Example 2.
[0055] Example 4
[0056] Reference Figure 1-3 , which is the fourth embodiment of the present invention, and which is different from the third embodiment in that it includes the following components:
[0057] 100 parts of formamide;
[0058] Thickener 15 parts;
[0059] 30 parts of thermal conductive filler.
[0060] The thickener is polyvinyl alcohol.
[0061] The thermally conductive filler is flake graphite.
[0062] The remaining structure is the same as that of Example 3.
[0063] Comparative Example 1
[0064] This comparative example is different from the fourth embodiment in that it includes the following components:
[0065] 100 parts of formamide;
[0066] Thickener 0 parts;
[0067] 0 parts of thermal conductive filler.
[0068] The remaining structures are the same as those of Example 4.
[0069] The results of the embodiments can be found in the following table:
[0070]
[0071]
[0072] By utilizing the common organic compound formamide, which has a melting point of 2 to 3°C, a flash point of 154°C, and a cost much lower than paraffin, it can be used as a 0 to 8°C phase change material. The polymer and formamide can then be made into a gel to prevent leakage and significantly improve its safety. In addition, thermal conductive fillers are used to enhance thermal conductivity, which facilitates heat transfer.
[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be included in the scope of the claims of the present invention.
Claims
1. A formamide-shaped phase change material, characterized in that: The components include: 100 parts of formamide; Thickener 5-15 parts; Thermally conductive filler 2-30 parts.
2. The formamide-shaped phase change material according to claim 1, characterized in that: The thickener includes one of polyvinyl alcohol, methyl cellulose, ethyl cellulose and hydroxyethyl cellulose.
3. The formamide-shaped phase change material according to claim 2, characterized in that: The thermally conductive filler includes one of flake graphite and expanded graphite.
4. A method for preparing a formamide-shaped phase change material, which is applied to the formamide-shaped phase change material described in claim 3, characterized in that: The following steps are included: S1, firstly, heating formamide to 60-120°C and stirring; S2, then adding the thickener to the heated formamide in S1, and then continuing to stir until the thickener is completely dissolved; S3, then adding the thermal conductive filler to the mixture of formamide and thickener in S2 and mixing them; S4, finally pouring the mixture in S4 into a storage tank and cooling it to obtain a non-leaking fixed phase change material.