Phase change energy storage mobile phone cover plate and preparation method thereof

Abstract

The invention discloses a phase change energy storage mobile phone cover plate and a preparation method thereof.The preparation method of the mobile phone cover plate comprises the steps that after a first substrate and a second substrate are correspondingly overlapped, the periphery is sealed through frame glue to form a cavity located between the first substrate and the second substrate, and meanwhile a pouring opening is reserved; after a phase change energy storage microcapsule material is poured into the cavity through the reserved pouring opening, the reserved pouring opening is sealed, and the phase change energy storage mobile phone cover plate is obtained. According to the phase change energy storage mobile phone cover plate and the preparation method thereof provided by the invention, the mobile phone cover plate contains the phase change energy storage microcapsule material which has the characteristic of approximate constant-temperature energy storage and heat release, and when the phase change energy storage microcapsule material is used in the mobile phone cover plate, the mobile phone cover plate can effectively exert the effects of heat dissipation and mobile phone temperature regulation.

Description

Technical Field

[0001] The invention belongs to the technical field of mobile phone cover plates, and in particular relates to a phase-change energy storage mobile phone cover plate and a preparation method thereof. Background Art

[0002] With the rapid development of electronic technology, mobile phones and other electronic products have become necessities of life. In pursuit of high performance, electronic components are developing towards miniaturization and integration, and the corresponding heat flux density is gradually increasing. Therefore, the heat dissipation of electronic components has become a research hotspot. As the most commonly used electronic device, mobile phones also face the problem of overheating. Once the data processing volume increases or the charging phone temperature rises to above 40°C, the processor system performance will be reduced due to the temperature increase. The high temperature of the phone will also damage the phone and even cause the phone to explode, thereby shortening the life of the phone.

[0003] In order to make the mobile phone operate normally, good heat dissipation of the mobile phone and how to maintain the temperature required for the normal operation of the mobile phone battery become particularly important. Due to the limitations of the size of the mobile phone, the mobile phone cannot add too many systems for cooling and heat preservation, so the mobile phone cover becomes an important auxiliary tool for mobile phone heat dissipation or heat preservation. At present, it is necessary to study a mobile phone cover with good heat dissipation and adjustable temperature. Summary of the invention

[0004] Based on the above technical problems, the present invention provides a phase change energy storage mobile phone cover and a preparation method thereof. The mobile phone cover contains a phase change energy storage microcapsule material, which has the characteristics of approximately constant temperature energy storage and heat release. When used in a mobile phone cover, the mobile phone cover can effectively dissipate heat and regulate the temperature of the mobile phone.

[0005] The present invention provides a method for preparing a phase-change energy storage mobile phone cover, comprising the following steps:

[0006] S1. After the first substrate and the second substrate are overlapped correspondingly, the periphery is sealed with a frame glue to form a cavity between the first substrate and the second substrate, and a filling port is reserved;

[0007] S2. After the phase-change energy storage microcapsule material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed to obtain the phase-change energy storage mobile phone cover.

[0008] In the present invention, by arranging a phase change energy storage microcapsule material in the cover body, it can absorb a large amount of heat within the phase change temperature range, so that the mobile phone can be maintained within the phase change temperature range for a long time, and has the advantages of good heat dissipation and temperature regulation.

[0009] Preferably, the material of the first substrate or the second substrate is at least one of glass, glass fiber, PC, PMMA or metal;

[0010] Preferably, the thickness of the first substrate or the second substrate is 0.2-2 mm.

[0011] Preferably, the frame glue is UV glue or OCA glue.

[0012] Preferably, the cavity has a thickness of 10-500 μm.

[0013] Preferably, the phase change energy storage microcapsule material comprises, by weight: 40-75 parts of UV resin, 10-35 parts of phase change microcapsules, 5-25 parts of active diluent and 1-10 parts of photoinitiator.

[0014] In the present invention, the phase-change energy storage microcapsule material contains phase-change microcapsules, and the phase-change material contained therein can effectively absorb the heat emitted by the mobile phone, so that the shell temperature does not increase during a longer operating time.

[0015] Preferably, the phase change microcapsules are paraffin@olefinic SiO2 microcapsules;

[0016] Preferably, the paraffin@olefinic SiO2 microcapsules are prepared by emulsifying paraffin and then subjecting it to gelling reaction with alkyl orthosilicate and olefinic silane coupling agent.

[0017] In the present invention, the phase change microcapsules use paraffin as the core material and olefinic SiO2 as the shell material. The phase change microcapsules not only have excellent heat storage capacity, high thermal stability and good shape stability, but also olefinic SiO2 can initiate polymerization with UV resin under the condition of photoinitiator, ensuring that the phase change microcapsules can be effectively dispersed in the resin matrix, showing more reliable and lasting phase change energy storage performance.

[0018] Preferably, the UV resin is at least one of polyurethane acrylic resin, epoxy acrylic resin or acrylate oligomer;

[0019] Preferably, the reactive diluent is at least one of isobornyl acrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, hydroxyethyl acrylate or 1,6-hexanediol diacrylate;

[0020] Preferably, the photoinitiator is at least one of 2-hydroxy-2-methyl-propiophenone, 1-hydroxycyclohexyl phenyl ketone or 2,4-dihydroxybenzophenone.

[0021] Preferably, the phase change energy storage microcapsule material further comprises 1-10 parts of an auxiliary agent;

[0022] Preferably, the auxiliary agent is at least one of a leveling agent, a defoaming agent, a filler or a pigment.

[0023] The present invention also provides a phase change energy storage mobile phone cover prepared by the above preparation method.

[0024] Preferably, the phase-change energy storage mobile phone cover comprises: a first substrate and a second substrate which are arranged relatively spaced apart and fixedly joined, and a phase-change energy storage microcapsule material located in the cavity between the first substrate and the second substrate.

[0025] Beneficial effects of the present invention:

[0026] The present invention provides a phase change energy storage mobile phone cover and a preparation method thereof. Since a phase change material is used and the phase change latent heat of the phase change material is relatively high, a large amount of heat can be absorbed within the phase change temperature range, so that the mobile phone can be maintained within the phase change temperature range for a long time. Within this temperature range, the mobile phone can work efficiently and the human body feels more comfortable. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic structural diagram of the phase change energy storage mobile phone cover plate of the present invention. DETAILED DESCRIPTION

[0028] Hereinafter, the present invention will describe the technical solution in detail through specific embodiments, but it should be clearly stated that these embodiments are for illustration only and are not to be construed as limiting the scope of the present invention.

[0029] Example 1

[0030] This embodiment provides a method for preparing a phase change energy storage mobile phone cover, comprising the following steps:

[0031] (1) providing two glass plates with a thickness of 1 mm, cutting them into the required product size, using one as a first substrate and the other as a second substrate;

[0032] (2) The first substrate and the second substrate are sealed at their peripheries with a frame glue (UV glue, Beiteli New Materials Co., Ltd.), and a cavity is formed between the first substrate and the second substrate. The thickness of the cavity is 70 μm, and a filling port is reserved for the frame glue to solidify;

[0033] (3) 60 parts of polyurethane acrylic resin (Temel 9063), 20 parts of paraffin @ olefinic SiO2 microcapsules (average particle size of 10 μm), 5 parts of isobornyl acrylate and 10 parts of dipropylene glycol diacrylate were mixed by weight, heated to 80°C and stirred for 20 minutes, cooled by 50°C, 5 parts of 2-hydroxy-2-methyl-propiophenone were added, stirred for 40 minutes, and ground to a fineness of 20 μm to obtain a phase change energy storage microcapsule material;

[0034] The preparation method of the paraffin @ olefinic SiO2 microcapsules comprises: adding hexadecyl trimethyl ammonium bromide (CTAB) to deionized water, heating to 65°C and stirring to completely dissolve, then adding C20 paraffin (n-eicosane), the mass ratio of CTAB to C20 paraffin being 1:30, stirring and emulsifying at high speed for 10 minutes, first adding ethylenediamine at 5wt% of the mass of C20 paraffin, then adding an isopropanol solution containing 15wt% of ethyl orthosilicate and 5wt% of vinyl trimethoxysilane at 15wt% of the mass of C20 paraffin, stirring and reacting at 60°C for 8h, filtering, washing and drying to obtain paraffin @ olefinic SiO2 microcapsules;

[0035] (4) After the phase change energy storage microcapsule material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed with frame glue (UV glue, Beiteli New Materials Co., Ltd.), and after curing, the phase change energy storage mobile phone cover is obtained.

[0036] Example 2

[0037] This embodiment provides a method for preparing a phase change energy storage mobile phone cover, comprising the following steps:

[0038] (1) providing two glass plates with a thickness of 1 mm, cutting them into the required product size, using one as a first substrate and the other as a second substrate;

[0039] (2) The first substrate and the second substrate are sealed at their peripheries with a frame glue (UV glue, Beiteli New Materials Co., Ltd.), and a cavity is formed between the first substrate and the second substrate. The thickness of the cavity is 70 μm, and a filling port is reserved for the frame glue to solidify;

[0040] (3) 40 parts of polyurethane acrylic resin (Temel 9063), 35 parts of paraffin @ olefinic SiO2 microcapsules (average particle size of 10 μm), 5 parts of tripropylene glycol diacrylate and 5 parts of 1,6-hexanediol diacrylate were mixed by weight, heated to 80°C and stirred for 20 minutes, cooled by 50°C, 1 part of 1-hydroxycyclohexyl phenyl ketone was added, stirred for 40 minutes, and ground to a fineness of 20 μm to obtain a phase change energy storage microcapsule material;

[0041] The preparation method of the paraffin @ olefinic SiO2 microcapsules comprises: adding hexadecyl trimethyl ammonium bromide (CTAB) to deionized water, heating to 65°C and stirring to completely dissolve, then adding C20 paraffin (n-eicosane), the mass ratio of CTAB to C20 paraffin being 1:30, stirring and emulsifying at high speed for 10 minutes, first adding ethylenediamine at 5wt% of the mass of C20 paraffin, then adding an isopropanol solution containing 15wt% of ethyl orthosilicate and 5wt% of vinyl trimethoxysilane at 15wt% of the mass of C20 paraffin, stirring and reacting at 60°C for 8h, filtering, washing and drying to obtain paraffin @ olefinic SiO2 microcapsules;

[0042] (4) After the phase change energy storage microcapsule material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed with frame glue (UV glue, Beiteli New Materials Co., Ltd.), and after curing, the phase change energy storage mobile phone cover is obtained.

[0043] Example 3

[0044] This embodiment provides a method for preparing a phase change energy storage mobile phone cover, comprising the following steps:

[0045] (1) providing two glass plates with a thickness of 1 mm, cutting them into the required product size, using one as a first substrate and the other as a second substrate;

[0046] (2) The first substrate and the second substrate are sealed at their peripheries with a frame glue (UV glue, Beiteli New Materials Co., Ltd.), and a cavity is formed between the first substrate and the second substrate. The thickness of the cavity is 70 μm, and a filling port is reserved for the frame glue to solidify;

[0047] (3) 75 parts of polyurethane acrylic resin (Temel 9028), 10 parts of paraffin @ olefinic SiO2 microcapsules (average particle size of 10 μm), 15 parts of isobornyl acrylate and 10 parts of 1,6-hexanediol diacrylate were mixed by weight, heated to 80°C and stirred for 20 minutes, cooled by 50°C, 10 parts of 2-hydroxy-2-methyl-propiophenone were added, stirred for 40 minutes, and ground to a fineness of 20 μm to obtain a phase change energy storage microcapsule material;

[0048] The preparation method of the paraffin @ olefinic SiO2 microcapsules comprises: adding hexadecyl trimethyl ammonium bromide (CTAB) to deionized water, heating to 65°C and stirring to completely dissolve, then adding C20 paraffin (n-eicosane), the mass ratio of CTAB to C20 paraffin being 1:30, stirring and emulsifying at high speed for 10 minutes, first adding ethylenediamine with a mass percentage of 5wt% of the C20 paraffin, then adding an isopropanol solution containing 15wt% of ethyl orthosilicate and 5wt% of vinyl trimethoxysilane with a mass percentage of C20 paraffin, stirring and reacting at 60°C for 8h, filtering, washing and drying to obtain paraffin @ olefinic SiO2 microcapsules;

[0049] (4) After the phase change energy storage microcapsule material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed with frame glue (UV glue, Beiteli New Materials Co., Ltd.), and after curing, the phase change energy storage mobile phone cover is obtained.

[0050] Comparative Example 1

[0051] This comparative example proposes a method for preparing a phase change energy storage mobile phone cover, comprising the following steps:

[0052] (1) providing two glass plates with a thickness of 1 mm, cutting them into the required product size, using one as a first substrate and the other as a second substrate;

[0053] (2) The first substrate and the second substrate are sealed at their peripheries with a frame glue (UV glue, Beiteli New Materials Co., Ltd.), and a cavity is formed between the first substrate and the second substrate. The thickness of the cavity is 70 μm, and a filling port is reserved for the frame glue to solidify;

[0054] (3) 60 parts of polyurethane acrylic resin (Temel 9063), 5 parts of isobornyl acrylate and 10 parts of dipropylene glycol diacrylate were mixed by weight, heated to 80° C. and stirred for 20 minutes, cooled by 50° C., 5 parts of 2-hydroxy-2-methyl-propiophenone were added, stirred for 40 minutes, and ground to a fineness of 20 μm to obtain a grouting material;

[0055] (4) After the grouting material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed with frame glue (UV glue, Beiteli New Materials Co., Ltd.), 2500 J / cm 2 After curing, the phase change energy storage mobile phone cover is obtained.

[0056] Comparative Example 2

[0057] This comparative example proposes a method for preparing a phase change energy storage mobile phone cover, comprising the following steps:

[0058] (1) providing two glass plates with a thickness of 1 mm, cutting them into the required product size, using one as a first substrate and the other as a second substrate;

[0059] (2) The first substrate and the second substrate are sealed at their peripheries with a frame glue (UV glue, Beiteli New Materials Co., Ltd.), and a cavity is formed between the first substrate and the second substrate. The thickness of the cavity is 70 μm, and a filling port is reserved for the frame glue to solidify;

[0060] (3) 60 parts of polyurethane acrylic resin (Temel 9063), 20 parts of paraffin @SiO2 microcapsules, 5 parts of isobornyl acrylate and 10 parts of dipropylene glycol diacrylate were mixed by weight, heated to 80°C and stirred for 20 minutes, cooled by 50°C, 5 parts of 2-hydroxy-2-methyl-propiophenone were added, stirred for 40 minutes, and ground to a fineness of 20 μm to obtain a phase change energy storage microcapsule material;

[0061] The preparation method of the paraffin @ SiO2 microcapsules comprises: adding hexadecyl trimethyl ammonium bromide (CTAB) into deionized water, heating to 65°C and stirring to completely dissolve, then adding C20 paraffin (n-eicosane), the mass ratio of CTAB to C20 paraffin being 1:30, stirring and emulsifying at high speed for 10 minutes, first adding ethylenediamine with a mass percentage of 5wt% of the C20 paraffin, then adding an isopropanol solution of ethyl orthosilicate with a mass percentage of 20wt% of the C20 paraffin, stirring and reacting at 60°C for 8 hours, filtering, washing, and drying to obtain paraffin @ SiO2 microcapsules;

[0062] (4) After the phase change energy storage microcapsule material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed with frame glue (UV glue, Beiteli New Materials Co., Ltd.), and after curing, the phase change energy storage mobile phone cover is obtained.

[0063] The mobile phone cover plates described in the embodiment and the comparative example were subjected to the following performance tests:

[0064] The same model of mobile phone was used for testing, and the mobile phone cover was replaced with the mobile phone cover prepared in the embodiment and the comparative example respectively and reassembled, the mobile phone brightness was adjusted to the maximum, and the 3D game was run continuously for several times (5min, 15min, 30min), and the highest temperature point of the cover was measured respectively. The results are shown in Table 1 below:

[0065] Table 1 Temperature control performance of the mobile phone battery cover plate described in the embodiment and the comparative example

[0066] Phase change enthalpy (J / g) 5min 15min 30min Example 1 192.3 37.5 40.3 42.0 Example 2 190.7 37.8 40.8 42.7 Example 3 183.5 38.2 41.5 43.4 Comparative Example 1 — 45.9 54.3 57.9 Comparative Example 2 156.7 40.2 46.7 50.0

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing a phase change energy storage mobile phone cover, characterized in that: The steps include: S1. After the first substrate and the second substrate are overlapped correspondingly, the periphery is sealed with a frame glue to form a cavity between the first substrate and the second substrate, and a filling port is reserved; S2. After the phase-change energy storage microcapsule material is poured into the cavity through the reserved pouring port, the reserved pouring port is sealed to obtain the phase-change energy storage mobile phone cover.

2. The method for preparing the phase change energy storage mobile phone cover according to claim 1, characterized in that: The material of the first substrate or the second substrate is at least one of glass, glass fiber, PC, PMMA or metal; Preferably, the thickness of the first substrate or the second substrate is 0.2-2 mm.

3. The method for preparing the phase change energy storage mobile phone cover according to claim 1 or 2, characterized in that: The frame glue is UV glue or OCA glue.

4. The method for preparing the phase change energy storage mobile phone cover according to any one of claims 1 to 3, characterized in that: The thickness of the cavity is 10-500 μm.

5. The method for preparing the phase change energy storage mobile phone cover according to any one of claims 1 to 4, characterized in that: The phase-change energy storage microcapsule material comprises, by weight: 40-75 parts of UV resin, 10-35 parts of phase-change microcapsules, 5-25 parts of active diluent and 1-10 parts of photoinitiator.

6. The method for preparing the phase change energy storage mobile phone cover according to claim 5, characterized in that: The phase change microcapsules are paraffin@olefin-based SiO2 microcapsules; Preferably, the paraffin@olefinic SiO2 microcapsules are prepared by emulsifying paraffin and then subjecting it to gelling reaction with alkyl orthosilicate and olefinic silane coupling agent.

7. The method for preparing the phase change energy storage mobile phone cover according to claim 5 or 6, characterized in that: The UV resin is at least one of polyurethane acrylic resin, epoxy acrylic resin or acrylate oligomer; The active diluent is at least one of isobornyl acrylate, dipropylene glycol diacrylate, tripropylene glycol diacrylate, hydroxyethyl acrylate or 1,6-hexanediol diacrylate; The photoinitiator is at least one of 2-hydroxy-2-methyl-propiophenone, 1-hydroxycyclohexyl phenyl ketone or 2,4-dihydroxybenzophenone.

8. The method for preparing the phase change energy storage mobile phone cover according to any one of claims 5 to 7, characterized in that: The phase change energy storage microcapsule material also includes 1-10 parts of auxiliary agent; Preferably, the auxiliary agent is at least one of a leveling agent, a defoaming agent, a filler or a pigment.

9. A phase change energy storage mobile phone cover prepared by the preparation method according to any one of claims 1 to 8.

10. The phase change energy storage mobile phone cover according to claim 9, characterized in that: include: A first substrate and a second substrate are arranged relatively spaced apart and fixedly joined, and a phase-change energy storage microcapsule material is located in the cavity between the first substrate and the second substrate.

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