A nanomaterial adding determination method, system and electronic device

Abstract

The application discloses a kind of nanomaterial adding determination method, system and electronic equipment, it is related to composite material technical field.The present application determines the thermal conductivity component of each nanomaterial based on heat conduction performance and interface thermal conductivity, that is, the thermal index of nanomaterial is obtained, and the potential of greater nanomaterial for improving heat conduction performance can be quickly judged based on this thermal index.Moreover, the present application determines the critical length by establishing the relationship between the thermal conductivity between each nanomaterial and base material and the characteristic length of each nanomaterial, when the characteristic length of the selected nanomaterial is less than the critical length, the effective size interval of the nanomaterial is determined, that is, the size index of nanomaterial is obtained, and then it can be judged that the given nanomaterial corresponds to the best thermal conductivity improvement interval, based on the above processing, the composite material meeting the requirements can be prepared by adding nanomaterial in base material based on the effective size interval of nanomaterial and / or thermal conductivity component.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite materials, and in particular to a method and system for determining the addition of nanomaterials and an electronic device. BACKGROUND

[0002] Various nanomaterials exist in actual production. The performance and economy of nanomaterials are usually the criteria for determining whether the nanomaterials are suitable for composite materials.

[0003] Generally, the influence of the addition of nanomaterials on the overall (matrix + admixture) thermal conductivity is determined by experiments or by constructing a composite model for simulation calculation. The existing methods for determining the influence of the addition of nanomaterials on the overall (matrix + admixture) thermal conductivity often have the disadvantages of high complexity and long time consumption.

[0004] In addition, the existing technology also uses a theoretical method to determine the influence of the addition of nanomaterials on the overall (matrix + admixture) thermal conductivity, but this method needs to be calculated, repeatedly measured and compared to complete, and also has the disadvantage of long time consumption. SUMMARY

[0005] To solve the above problems existing in the prior art, the present application provides a method and system for determining the addition of nanomaterials and an electronic device.

[0006] To achieve the above-mentioned purpose, the present application provides the following solutions.

[0007] A method for determining the addition of nanomaterials, comprising:

[0008] obtaining thermal conductivity and interfacial thermal conductivity between each nanomaterial and a base material; the thermal conductivity is the thermal conductivity of a composite material to be prepared;

[0009] determining the thermal conductivity component of each nanomaterial based on the thermal conductivity and the interfacial thermal conductivity;

[0010] obtaining the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial;

[0011] establishing the relationship between the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial;

[0012] determining the critical length based on the relationship between the thermal conductivity and the characteristic length of the nanomaterial;

[0013] selecting a nanomaterial and determining whether the characteristic length of the selected nanomaterial is less than the critical length to obtain a determination result;

[0014] when the judgment result is yes, determining an effective size interval of the selected nanomaterial, and determining addition of the nanomaterial in the base material based on the effective size interval of the selected nanomaterial and a thermal conductivity component of the selected nanomaterial, so as to prepare a composite material;

[0015] when the judgment result is no, determining the addition of the nanomaterial in the base material based on the characteristic length of the selected nanomaterial and the thermal conductivity component of the selected nanomaterial, so as to prepare the composite material.

[0016] Optionally, the calculation formula of the thermal conductivity component is:

[0017]

[0018] In the formula, is the thermal conductivity component, κ nano is the thermal conductivity performance, G I is an interface thermal conductivity between the nanomaterial and the base material, a i is a geometric factor of the nanomaterial.

[0019] Optionally, after determining the thermal conductivity component of each nanomaterial based on the thermal conductivity performance and the interface thermal conductivity, the method further comprises:

[0020] determining, based on inequality operation rules, that the relationship between the thermal conductivity component and the thermal conductivity performance is a proportional relationship.

[0021] Optionally, the relationship between the thermal conductivity component and the thermal conductivity performance is determined to be a proportional relationship based on inequality operation rules, and specifically comprises:

[0022] setting the geometric factor a i of the nanomaterial to 1, and obtaining a formula

[0023] determining, based on the formula that the relationship between the thermal conductivity component and the thermal conductivity performance is a proportional relationship.

[0024] Optionally, before obtaining the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial, the method further comprises:

[0025] obtaining the thermal conductivity of each nanomaterial, and setting the incorporation amount of each nanomaterial;

[0026] determining the thermal conductivity between each nanomaterial and the base material based on the thermal conductivity of each nanomaterial, the interface thermal conductivity, and the incorporation amount of each nanomaterial.

[0027] According to the specific embodiments of the present application, the following technical effects are provided:

[0028] The application provides a nanomaterial adding determination method, which is based on thermal conductivity and interfacial thermal conductivity to determine the thermal conductivity component of each nanomaterial, that is, to obtain the thermal index of the nanomaterial, and based on the thermal index, the nanomaterial with greater potential to improve the thermal conductivity can be quickly determined. In addition, the application determines the critical length by establishing the relationship between the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial. When the characteristic length of the selected nanomaterial is less than the critical length, the effective size interval of the nanomaterial is determined, that is, the size index of the nanomaterial is obtained, and then it can be determined that the given nanomaterial corresponds to the best thermal conductivity improvement interval. Based on the above processing, the nanomaterial can be added in the base material to prepare a composite material meeting the requirements based on the effective size interval and / or the thermal conductivity component of the nanomaterial.

[0029] In addition, the application also provides the following implementation structures:

[0030] A nanomaterial adding determination system applied to the nanomaterial adding determination method provided above; the system comprises:

[0031] A first acquisition module configured to acquire the thermal conductivity and the interfacial thermal conductivity between each nanomaterial and the base material; the thermal conductivity is the thermal conductivity of the composite material to be prepared;

[0032] A thermal conductivity component determination module configured to determine the thermal conductivity component of each nanomaterial based on the thermal conductivity and the interfacial thermal conductivity;

[0033] A second acquisition module configured to acquire the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial;

[0034] A relationship establishment module configured to establish the relationship between the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial;

[0035] A critical length determination module configured to determine the critical length based on the relationship between the thermal conductivity and the characteristic length of the nanomaterial;

[0036] A judgment module configured to select a nanomaterial and determine whether the characteristic length of the selected nanomaterial is less than the critical length to obtain a judgment result;

[0037] A first preparation module configured to, when the judgment result is yes, determine the effective size interval of the selected nanomaterial and determine the addition of the nanomaterial in the base material based on the effective size interval of the selected nanomaterial and the thermal conductivity component of the selected nanomaterial to prepare a composite material;

[0038] A second preparation module is configured to, when the determination result is negative, determine the addition of the nanomaterial in the base material based on the selected characteristic length of the nanomaterial and the selected thermal conductance component of the nanomaterial, so as to prepare the composite material.

[0039] An electronic device comprises:

[0040] A memory is configured to store a computer program.

[0041] A processor is connected to the memory and configured to invoke and execute the computer program to implement the nanomaterial addition determination method provided above.

[0042] Optionally, the memory is a computer readable storage medium.

[0043] The technical effects achieved by the above two implementation structures provided by the present application are the same as the technical effects achieved by the nanomaterial addition determination method provided by the present application, and thus will not be described here again. BRIEF DESCRIPTION OF DRAWINGS

[0044] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0045] Figure 1 The flowchart of the nanomaterial addition determination method provided by the present application;

[0046] Figure 2 The schematic diagram of the thermal conductivity and the interface thermal conductance with the growth of the interface strength provided by the present application;

[0047] Figure 3 The schematic diagram of the relationship between the thermal conductivity and the characteristic length of the nanomaterial provided by the present application. DETAILED DESCRIPTION

[0048] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0049] The purpose of this invention is to provide a method, system, and electronic device for determining the addition of nanomaterials, which can intuitively reflect the advantages and disadvantages of nanomaterials in improving thermal conductivity, facilitate the comparison and selection of nanomaterials, reduce computational costs, and thus provide a strong basis for the addition of nanomaterials in composite materials.

[0050] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0051] Example 1

[0052] like Figure 1 As shown, the method for determining the addition of nanomaterials provided in this embodiment includes:

[0053] Step 100: Obtain the thermal conductivity and the interfacial thermal conductivity between each nanomaterial and the base material. Thermal conductivity refers to the thermal conductivity of the composite material to be prepared, i.e., the thermal conductivity between each nanomaterial and the base material. For example, introducing a reduction factor α, the calculation formula for thermal conductivity is given as follows:

[0054] κ nano =αK nano (1)

[0055] K nano For the thermal conductivity of individual nanomaterials, κ nano For thermal conductivity.

[0056] Step 101: Determine the thermal conductivity component of each nanomaterial based on its thermal conductivity properties and interfacial thermal conductivity. The formula for calculating the thermal conductivity component is as follows:

[0057]

[0058] In the formula, κ is the thermal conductivity component. nano For thermal conductivity, G I For the interfacial thermal conductivity between nanomaterials and base materials, a i is the geometric factor of nanomaterials.

[0059] Here, it is assumed that a in the formula i =1 represents the geometric factor of nanomaterials, which does not affect the derivation of thermal properties and can therefore be ignored. Let:

[0060]

[0061] It is not difficult to find x and They are inversely proportional. According to the inequality operation [a+b>=2(ab)exp(0.5)], x can be expressed as:

[0062]

[0063] Based on the above formula, the thermal index K nano G I The greater the x, the smaller the x, The greater the value, the better the overall thermal conductivity of the nanomaterial.

[0064] Based on the above description, the thermal conductivity K nano , the interface thermal conductivity G I Two physical quantities showing opposite increasing trends with the increase of interface strength are unified, as shown in Figure 2 Figure 2 In the formula, TC represents the thermal conductivity K nano , ITC represents the interface thermal conductivity G I , and oxygen concentration represents the interface strength.

[0065] Step 102: Obtain the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial. The determination process of the thermal conductivity between each nanomaterial and the base material is as follows:

[0066] Determine the type of nanomaterial added to the base material, obtain its thermal conductivity, interface thermal conductivity, and added amount data, and obtain the thermal conductivity of the overall nanomaterial + base material (i.e. composite material) thermal conductivity K eff , five indexes are needed, which are the thermal conductivity of the base material K CSH , the thermal conductivity of the nanomaterial on the base material K nano , the heat transfer efficiency between the nanomaterial and the base material (i.e. interface thermal conductivity G I ), and the nanomaterial content f and the nanomaterial size L. The relationship between the six can be expressed by the following function:

[0067]

[0068] The prediction process of K eff includes molecular dynamics simulation (Molecular Dynamics, MD) and two theories (homogenization theory and effective medium theory). The thermal conductivity of the composite material increases with the increase of filler content f and material size L. For nanomaterials, adding a small amount of additives to the base material can improve the heat transfer coefficient of the composite material, but its excessive application may lead to the aggregation of polymers and the decrease of thermal conductivity.

[0069] Step 103: Establish the relationship between the thermal conductivity between each nanomaterial and the base material and the characteristic length of each nanomaterial.

[0070] ​When selecting between two or more nanomaterials using cement-based materials, size indices are introduced to differentiate the optimal size range of the nanomaterials, thereby improving their performance. In other words, within a certain size range, if one nanomaterial is larger than others, then this size range is the size index for that nanomaterial. For example... Figure 3 As shown, four materials (graphene, GO-1%, GO-10%, GO-20%) will be used as examples.

[0071] Step 104: Determine the critical length based on the relationship between thermal conductivity and the characteristic length of nanomaterials. For example, in Figure 3 In the diagram, the intersections of GO-20% and GO-10%, GO-10% and GO-1%, and GO-10% and graphene can be directly observed at points A, B, and C, respectively. For point A, L = 107.52 μm (i.e., the critical length). When L < 107.52 μm, the thermal conductivity (κ) of the GO-1% / cement composite material is... eff The value of κ is higher than that of graphene / cement composites. Furthermore, when L > 107.52 μm, the κ value of the graphene / cement composite is higher. eff On the contrary, it is even higher. Points B and C have the same characteristics. Therefore, for only three nanomaterials, GO-20%, GO-10%, GO-1%, and graphene, the corresponding effective size ranges are (0–0.33 μm), (0.33–17.26 μm), (17.26–107.52 μm), and (107.52–∞ μm), respectively. This example only uses GO (graphene oxide) with different O (oxygen) concentrations as examples to illustrate the optimal size of different nanomaterials.

[0072] Step 105: Select nanomaterials and determine whether the characteristic length of the selected nanomaterials is less than the critical length, and obtain the judgment result.

[0073] Step 106: When the judgment result is yes, determine the effective size range of the selected nanomaterial, and determine the addition of this nanomaterial to the base material based on the effective size range of the selected nanomaterial and the thermal conductivity component of the selected nanomaterial, so as to prepare the composite material.

[0074] Step 107: When the judgment result is negative, determine the addition of this nanomaterial to the base material based on the characteristic length and thermal conductivity component of the selected nanomaterial to prepare the composite material.

[0075] Example 2

[0076] This embodiment provides a nanomaterial addition determination system, applied to the nanomaterial addition determination method provided in Embodiment 1 above. The system includes:

[0077] The first obtaining module is configured to obtain the thermal conductivity and the interfacial thermal conductance between each kind of nanomaterial and the base material. The thermal conductivity is the thermal conduction performance of the composite material to be prepared.

[0078] The thermal conductance component determining module is configured to determine the thermal conductance component of each kind of nanomaterial based on the thermal conductivity and the interfacial thermal conductance.

[0079] The second obtaining module is configured to obtain the thermal conductivity between each kind of nanomaterial and the base material and the characteristic length of each kind of nanomaterial.

[0080] The relationship establishing module is configured to establish the relationship between the thermal conductivity between each kind of nanomaterial and the base material and the characteristic length of each kind of nanomaterial.

[0081] The critical length determining module is configured to determine the critical length based on the relationship between the thermal conductivity and the characteristic length of the nanomaterial.

[0082] The judging module is configured to select the nanomaterial and judge whether the characteristic length of the selected nanomaterial is less than the critical length to obtain a judgment result.

[0083] The first preparation module is configured to, when the judgment result is yes, determine the effective size range of the selected nanomaterial, and determine the addition of the nanomaterial in the base material based on the effective size range of the selected nanomaterial and the thermal conductance component of the selected nanomaterial to prepare the composite material.

[0084] The second preparation module is configured to, when the judgment result is no, determine the addition of the nanomaterial in the base material based on the characteristic length of the selected nanomaterial and the thermal conductance component of the selected nanomaterial to prepare the composite material.

[0085] Embodiment 3

[0086] The embodiment provides an electronic device, which comprises:

[0087] The memory is configured to store the computer program.

[0088] The processor is connected with the memory and is configured to call and execute the computer program to implement the nanomaterial addition determination method provided in the above embodiment 1.

[0089] In addition, the computer program in the storage described above is realized in the form of a software function unit and sold or used as an independent product, and can be stored in a computer readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or the part that contributes to the prior art or part of the technical solutions can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a plurality of instructions to make a computer device (which can be a personal computer, a server or a network device, etc.) execute all or part of the steps of the embodiments of the method of the present application. The storage medium described above includes: a U disk, a mobile hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk, and various media that can store program codes.

[0090] Based on the above description of the present application, two evaluation indexes are proposed: thermal index and size index, which can better improve the thermal conductivity of the composite material. The thermal index can quickly determine which of the various nanomaterials has greater potential to improve thermal performance. The size index can determine the optimal thermal conductivity improvement interval of the given nanomaterial, which can provide strong guidance for the addition of nanomaterials. Moreover, based on the information disclosed in the present application, not only can the influence of nanomaterials on the thermal conductivity of the composite material be comprehensively understood, but also valuable ideas and guidance can be provided for future similar research.

[0091] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or electronic device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part.

[0092] The principles and implementation manners of the present application are described by applying specific examples in this paper, and the above embodiment description is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation manner and application range will be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A method for determining the addition of nanomaterials, characterized in that, include: To obtain thermal conductivity properties and interfacial thermal conductivity between each nanomaterial and the base material; The thermal conductivity refers to the thermal conductivity of the composite material to be prepared. The thermal conductivity component of each nanomaterial is determined based on the aforementioned thermal conductivity properties and the interfacial thermal conductivity; wherein, the calculation formula for the thermal conductivity component is: ； In the formula, For thermal conductivity components, For thermal conductivity, The interfacial thermal conductivity between the nanomaterial and the base material. For the geometric factors of nanomaterials, ; The thermal conductivity between each nanomaterial and the base material, as well as the characteristic length of each nanomaterial, are obtained. Establish the relationship between the thermal conductivity of each nanomaterial and the base material and the characteristic length of each nanomaterial; The critical length is determined based on the relationship between the thermal conductivity and the characteristic length of the nanomaterial; Select a nanomaterial and determine whether the characteristic length of the selected nanomaterial is less than the critical length to obtain the determination result; When the judgment result is yes, the effective size range of the selected nanomaterial is determined, and the addition of this nanomaterial to the base material is determined based on the effective size range of the selected nanomaterial and the thermal conductivity component of the selected nanomaterial, so as to prepare a composite material. When the judgment result is negative, the addition of this nanomaterial to the base material is determined based on the characteristic length and thermal conductivity component of the selected nanomaterial, so as to prepare a composite material.

2. The method for determining the addition of nanomaterials according to claim 1, characterized in that, After determining the thermal conductivity component of each nanomaterial based on the thermal conductivity properties and the interfacial thermal conductivity, the method further includes: Based on the rules of inequality operations, the relationship between the thermal conductivity component and the thermal conductivity performance is determined to be directly proportional.

3. The method for determining the addition of nanomaterials according to claim 2, characterized in that, Based on the rules of inequality operations, the relationship between the thermal conductivity component and the thermal conductivity performance is determined to be directly proportional, specifically including: Setting the geometric factors of nanomaterials The value is 1, and the formula is obtained based on the rules of inequality operations. ; Based on the formula The relationship between the thermal conductivity component and the thermal conductivity property is determined to be directly proportional.

4. The method for determining the addition of nanomaterials according to claim 1, characterized in that, Before obtaining the thermal conductivity between each nanomaterial and the base material, and the characteristic length of each nanomaterial, the method further includes: The thermal conductivity of each nanomaterial was obtained, and the doping amount of each nanomaterial was set. The thermal conductivity between each nanomaterial and the base material is determined based on the thermal conductivity of each nanomaterial, the interfacial thermal conductivity, and the doping amount of each nanomaterial.

5. A system for determining the addition of nanomaterials, characterized in that, The system is applied to the method for determining the addition of nanomaterials as described in any one of claims 1-4; the system comprises: The first acquisition module is used to acquire thermal conductivity and interfacial thermal conductivity between each nanomaterial and the base material; the thermal conductivity is the thermal conductivity of the composite material to be prepared. A thermal conductivity component determination module is used to determine the thermal conductivity component of each nanomaterial based on the thermal conductivity and the interfacial thermal conductivity. The second acquisition module is used to acquire the thermal conductivity between each nanomaterial and the base material, as well as the characteristic length of each nanomaterial. A relationship establishment module is used to establish the relationship between the thermal conductivity of each nanomaterial and the base material and the characteristic length of each nanomaterial. A critical length determination module is used to determine the critical length based on the relationship between the thermal conductivity and the characteristic length of the nanomaterial; The judgment module is used to select nanomaterials and determine whether the characteristic length of the selected nanomaterials is less than the critical length, and obtain the judgment result. The first preparation module is used to determine the effective size range of the selected nanomaterial when the judgment result is yes, and to determine the addition of this nanomaterial to the base material based on the effective size range of the selected nanomaterial and the thermal conductivity component of the selected nanomaterial, so as to prepare a composite material. The second preparation module is used to determine the addition of this nanomaterial to the base material based on the characteristic length and thermal conductivity component of the selected nanomaterial when the judgment result is negative, so as to prepare a composite material.

6. An electronic device, characterized in that, include: Memory, used to store computer programs; A processor, connected to the memory, is configured to retrieve and execute the computer program to implement the nanomaterial addition determination method as described in any one of claims 1-4.

7. The electronic device according to claim 6, characterized in that, The memory is a computer-readable storage medium.

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