Antiviral high-thermal-conductivity gasket and preparation method thereof

Abstract

The invention belongs to the technical field of heat-conducting gaskets, and particularly relates to an antiviral high-heat-conductivity gasket and a preparation method thereof. According to the invention, vinyl silicone oil and hydrogen-containing silicone oil are used as carriers, the ceramic filler is treated, metal ions are attached to the surface of the ceramic filler, and then blending is carried out to form the high-heat-conductivity heat-conducting gasket with excellent heat conductivity coefficient and antibacterial and antiviral effects; however, no influence is generated on the electrical performance of the compound, and the compound has the excellent characteristics of outstanding antiviral effect, no biological resistance, small effective amount, low comprehensive use cost and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of thermal conductive gaskets, and in particular relates to an antiviral high thermal conductive gasket and a preparation method thereof. Background Art

[0002] Thermal pads are high-performance gap-filling thermal conductive materials, mainly used for the interface between electronic devices and heat sinks or product housings. They have good viscosity, flexibility and compression properties, and can effectively transfer heat, prevent equipment from overheating, and protect electronic components from damage. Thermal pads usually have good viscosity, flexibility, compression properties and excellent thermal conductivity; the material itself has a certain degree of flexibility, and can fit well between power devices and heat sink aluminum sheets or machine housings to achieve the best thermal conductivity and heat dissipation purposes.

[0003] The thermal conductive interface materials on the market generally use conventional alumina, aluminum hydroxide, aluminum nitride, carbon fiber, etc. as fillers to produce products with certain thermal conductive effects. The technical principle is: using a certain adhesive as a carrier, mixing it with ceramic fillers to form a certain thermal conductive path, thereby realizing heat transfer, but conventional products do not have antiviral and antibacterial effects. Summary of the invention

[0004] In response to the above technical problems, the present invention provides an antiviral high thermal conductivity gasket and a preparation method thereof, which can make up for the fact that the thermal conductive interface material cannot be antibacterial and antiviral, thereby further improving the service life of the material.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] An antiviral high thermal conductivity gasket comprises the following raw materials in parts by weight: 150-250 parts of functional ceramic powder filler, 10-14 parts of vinyl silicone oil, 0.1-0.3 parts of hydrogen-containing silicone oil, 0.1-0.2 parts of chain extender, 1-3 parts of silane coupling agent, 0.2-0.4 parts of inhibitor, and 0.1-0.3 parts of platinum catalyst.

[0007] In one embodiment, the preparation method of the functional ceramic powder filler is:

[0008] S1. Mix silver powder and water in a mass ratio of 1:2-4, then add a fruit acid solution of equal mass to water, mix and stir at 30-60°C, adjust the pH, filter, and obtain a silver ion solution;

[0009] S2. Spherical alumina and silver ion solution are mixed in a mass ratio of 1:2-6, stirred and soaked, and dried at high temperature to obtain a modified alumina filler;

[0010] S3. Mix the modified alumina filler and the mixed liquid at a mass ratio of 1:4-7 at 55-65°C, filter and dry to obtain a functional ceramic powder filler.

[0011] In one embodiment, the mixed solution is obtained by mixing an ethanol solution and a coupling agent in a mass ratio of 15:1-2.

[0012] In one embodiment, the coupling agent is any one of 3-glycidyloxypropyltrimethoxysilane, dodecyltrimethoxysilane, and octyltriethoxysilane.

[0013] In one embodiment, the chain extender is any one of terminal hydrogen-containing silicone oil, dimethyldiethoxysilane, and methyltrimethoxysilane.

[0014] In one embodiment, the silane coupling agent is any one of 3-glycidyloxypropyltrimethoxysilane, dodecyltrimethoxysilane, and octyltriethoxysilane.

[0015] In one embodiment, the inhibitor is acetylene cyclohexanol.

[0016] In one embodiment, the platinum catalyst is platinum (0)-1,3-diethene-1,1,3,3-tetramethyldisiloxane.

[0017] Another aspect of the present invention is to provide a method for preparing the antiviral high thermal conductivity gasket, the method comprising the following steps:

[0018] (1) Take materials by weight;

[0019] (2) Preparation of component A: Take 50-58% of the total mass of vinyl silicone oil, 50% of the total mass of functional ceramic powder filler, platinum catalyst, and silane coupling agent and stir evenly to obtain component A;

[0020] (3) Preparation of component B: stir the remaining vinyl silicone oil, the remaining functional ceramic powder filler, hydrogen-containing silicone oil, chain extender, and inhibitor to obtain component B;

[0021] (4) Component A and component B are vacuum-mixed, placed in a screw extruder for degassing, placed on a calendering line for calendering after extrusion, and baked at 80-125° C. to obtain an antiviral high thermal conductivity gasket.

[0022] Beneficial effects:

[0023] The present invention uses vinyl silicone oil and hydrogen-containing silicone oil as carriers, treats ceramic fillers, attaches metal ions to the surface of the ceramic fillers, and then blends them to form a high thermal conductivity gasket with excellent thermal conductivity and antibacterial and antiviral effects. Although the present invention adds metal ions, it does not have any effect on its electrical properties, and obtains outstanding antiviral effects, no biological resistance, a small amount of effective dosage, and low comprehensive use cost. DETAILED DESCRIPTION

[0024] Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by those of ordinary skill in the art to which the present disclosure belongs. In the event of a conflict, the definitions in this specification shall prevail.

[0025] Unless otherwise indicated, all percentages, parts, ratios, etc. are by weight.

[0026] As used herein, the terms "comprises," "comprising," "having," "having," "containing," or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that includes a list of elements is not necessarily limited to only those elements but may also include other elements not expressly listed or inherent to the composition, process, method, article, or apparatus.

[0027] When quantity, weight parts or other numerical value or parameter are given with range, preferred range or a series of upper preferred value and lower preferred value, it should be understood that it specifically discloses all ranges formed by any pair of numerical values ​​of any larger range limit or preferred value and any smaller range limit or preferred value, regardless of whether the range is disclosed respectively. For example, when describing the range of "1 to 5", the described range should be understood to include the range of "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5" etc. Unless otherwise stated, in the description of numerical range herein, the range is intended to include the range end value and all integers, fractions, decimals, etc. within the range.

[0028] In addition, the indefinite articles "a" and "an" before the elements or components of the present disclosure are intended to indicate that the number of occurrences (i.e., occurrences) of the elements or components is not limited. Therefore, "a" or "an" should be understood to include one or at least one, unless it is clearly indicated that the number is singular, otherwise the elements or components in the singular form also include the plural case.

[0029] Unless specifically stated, the materials, methods, and examples described herein are illustrative only and not limiting. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present disclosure, suitable methods and materials are still described herein.

[0030] The present disclosure is described in detail below.

[0031] Example 1

[0032] The coupling agent is 3-glycidyloxypropyltrimethoxysilane.

[0033] The mixed solution is prepared by mixing the ethanol solution and the coupling agent in a mass ratio of 15:1 to obtain a mixed solution.

[0034] The preparation method of functional ceramic powder filler is:

[0035] S1. Mix silver powder and water in a mass ratio of 1:2, add water and a 60% mass fraction of a fruit acid solution, stir at 30 ° C for 3h, adjust the pH to 6, filter, collect the filtrate, and obtain a silver ion solution;

[0036] S2. Spherical alumina with a particle size range of 30 μm and silver ion solution were mixed in a mass ratio of 1:2, stirred and soaked for 1 h, and dried at a high temperature of 120 ° C to obtain a modified alumina filler;

[0037] S3. The modified alumina filler and the mixed liquid are mixed at a mass ratio of 1:4 at 55°C for 4 hours, filtered, and dried to obtain a functional ceramic powder filler.

[0038] Example 2

[0039] The coupling agent is 3-glycidyloxypropyltrimethoxysilane.

[0040] The mixed liquid is prepared by mixing the ethanol solution and the coupling agent in a mass ratio of 15:1.5 to obtain a mixed liquid.

[0041] The preparation method of functional ceramic powder filler is:

[0042] S1. Mix silver powder and water in a mass ratio of 1:3, add water and a 60% mass fraction of a fruit acid solution, stir at 30 ° C for 3h, adjust the pH to 6, filter, collect the filtrate, and obtain a silver ion solution;

[0043] S2. Spherical alumina with a particle size range of 30 μm and silver ion solution were mixed in a mass ratio of 1:4, stirred and soaked for 1 h, and dried at a high temperature of 120 ° C to obtain a modified alumina filler;

[0044] S3. The modified alumina filler and the mixed liquid are mixed at a mass ratio of 1:5 at 60°C for 4 hours, filtered, and dried to obtain a functional ceramic powder filler.

[0045] Example 3

[0046] The coupling agent is 3-glycidyloxypropyltrimethoxysilane.

[0047] The mixed solution is prepared by mixing the ethanol solution and the coupling agent in a mass ratio of 15:2 to obtain a mixed solution.

[0048] The preparation method of functional ceramic powder filler is:

[0049] S1. Mix silver powder and water in a mass ratio of 1:4, add water and a 60% mass fraction of a fruit acid solution, stir at 30 ° C for 3h, adjust the pH to 6, filter, collect the filtrate, and obtain a silver ion solution;

[0050] S2. Spherical alumina with a particle size range of 30 μm and silver ion solution were mixed in a mass ratio of 1:6, stirred and soaked for 1 h, and dried at a high temperature of 120 ° C to obtain a modified alumina filler;

[0051] S3. The modified alumina filler and the mixed liquid are mixed at a mass ratio of 1:7 at 65°C for 4 hours, filtered, and dried to obtain a functional ceramic powder filler.

[0052] Example 4

[0053] The functional ceramic powder filler is selected from that prepared in Example 2.

[0054] The chain extender is hydrogen-terminated silicone oil.

[0055] The silane coupling agent is 3-glycidyloxypropyltrimethoxysilane.

[0056] The inhibitor is acetylene cyclohexanol.

[0057] The platinum catalyst is platinum (0)-1,3-diethene-1,1,3,3-tetramethyldisiloxane.

[0058] An antiviral high thermal conductivity gasket comprises the following raw materials in parts by weight: 150 parts of functional ceramic powder filler, 10 parts of vinyl silicone oil, 0.1 parts of hydrogen-containing silicone oil, 1 part of silane coupling agent, 0.2 parts of inhibitor, and 0.1 parts of platinum catalyst.

[0059] Example 5

[0060] The functional ceramic powder filler is selected from that prepared in Example 2.

[0061] The chain extender is hydrogen-terminated silicone oil.

[0062] The silane coupling agent is 3-glycidyloxypropyltrimethoxysilane.

[0063] The inhibitor is acetylene cyclohexanol.

[0064] The platinum catalyst is platinum (0)-1,3-diethene-1,1,3,3-tetramethyldisiloxane.

[0065] An antiviral high thermal conductivity gasket comprises the following raw materials in parts by weight: 246 parts of functional ceramic powder filler, 11 parts of vinyl silicone oil, 0.2 parts of hydrogen-containing silicone oil, 1.5 parts of silane coupling agent, 0.3 parts of inhibitor, and 0.2 parts of platinum catalyst.

[0066] Example 6

[0067] The functional ceramic powder filler is selected from that prepared in Example 2.

[0068] The chain extender is hydrogen-terminated silicone oil.

[0069] The silane coupling agent is 3-glycidyloxypropyltrimethoxysilane.

[0070] The inhibitor is acetylene cyclohexanol.

[0071] The platinum catalyst is platinum (0)-1,3-diethene-1,1,3,3-tetramethyldisiloxane.

[0072] An antiviral high thermal conductivity gasket comprises the following raw materials in parts by weight: 250 parts of functional ceramic powder filler, 14 parts of vinyl silicone oil, 0.3 parts of hydrogen-containing silicone oil, 3 parts of silane coupling agent, 0.4 parts of inhibitor, and 0.3 parts of platinum catalyst.

[0073] Comparative Example 1

[0074] It is basically the same as Example 5, except that during the preparation of the functional ceramic powder filler, the mass ratio of silver powder to water is 1:4.5.

[0075] Comparative Example 2

[0076] It is basically the same as Example 5, except that during the preparation of the functional ceramic powder filler, the mass ratio of silver powder to water is 1:5.

[0077] Comparative Example 3

[0078] It is basically the same as Example 5, except that during the preparation of the functional ceramic powder filler, the mass ratio of silver powder to water is 1:1.5.

[0079] Comparative Example 4

[0080] It is basically the same as Example 5, except that during the preparation of the functional ceramic powder filler, the mass ratio of silver powder to water is 1:1.7.

[0081] Comparative Example 5

[0082] It is basically the same as Example 5, except that the functional ceramic powder filler is 30 μm spherical alumina.

[0083] The antiviral high thermal conductivity gaskets in Examples 4-6 and Comparative Examples 1-5 are prepared according to the following method, which includes the following steps:

[0084] (1) Take materials by weight;

[0085] (2) Preparation of component A: 55% of the total mass of vinyl silicone oil, 50% of the total mass of functional ceramic powder filler, platinum catalyst, and silane coupling agent are mixed evenly to obtain component A;

[0086] (3) Preparation of component B: stir the remaining vinyl silicone oil, the remaining functional ceramic powder filler, hydrogen-containing silicone oil, chain extender, and inhibitor to obtain component B;

[0087] (4) Component A and component B are vacuum-mixed, placed in a screw extruder for degassing, placed on a calendering line for calendering after extrusion, and baked at 107° C. for 18 minutes to obtain an antiviral high thermal conductivity gasket.

[0088] The antiviral high thermal conductivity gaskets prepared in Examples 4-6 and Comparative Examples 1-5 were tested as follows:

[0089] Thermal conductivity: tested according to ASTM D5470;

[0090] Thermal resistance: tested according to ASTM D5470;

[0091] Hardness: Tested according to ASTM D2240:

[0092] Dielectric strength: tested according to ASTM D149;

[0093] Volume resistivity: tested according to ASTM D257;

[0094] Flame retardant: tested according to UL94.

[0095] The test results are shown in Table 1.

[0096] Table 1

[0097]

[0098] It can be seen from Table 1 that the performance of the antiviral high thermal conductivity gasket prepared by the present invention is improved to a certain extent without affecting its electrical performance.

[0099] The antiviral high thermal conductivity gaskets prepared in Examples 4-6 and Comparative Examples 1-5 were tested as follows:

[0100] Antibacterial test: According to GB / T 21886-2008, the results are shown in Table 2;

[0101] Antiviral test: According to T / GDTL011-2020, influenza A virus H3N2 (ATCC VR-1679) host name: MDCK cells, the results are shown in Table 3.

[0102] Table 2:

[0103]

[0104] Table 3:

[0105]

[0106]

[0107] It can be seen from Tables 2 and 3 that with the increase of metal ions, the antiviral and antibacterial effects are significant, while Comparative Example 5 using only ceramic powder filler has no antibacterial and antiviral effects.

[0108] 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. An anti-viral high thermal conductivity gasket, characterized in that: The gasket comprises the following raw materials in parts by weight: 150-250 parts of functional ceramic powder filler, 10-14 parts of vinyl silicone oil, 0.1-0.3 parts of hydrogen-containing silicone oil, 0.1-0.2 parts of chain extender, 1-3 parts of silane coupling agent, 0.2-0.4 parts of inhibitor, and 0.1-0.3 parts of platinum catalyst.

2. The antiviral high thermal conductivity gasket according to claim 1, characterized in that: The preparation method of the functional ceramic powder filler is: S1. Mix silver powder and water in a mass ratio of 1:2-4, then add a fruit acid solution of equal mass to water, mix and stir at 30-60°C, adjust the pH, filter, and obtain a silver ion solution; S2. Spherical alumina and silver ion solution are mixed in a mass ratio of 1:2-6, stirred and soaked, and dried at high temperature to obtain a modified alumina filler; S3. Mix the modified alumina filler and the mixed liquid at a mass ratio of 1:4-7 at 55-65°C, filter and dry to obtain a functional ceramic powder filler.

3. The antiviral high thermal conductivity gasket according to claim 2, characterized in that: The mixed liquid is obtained by mixing an ethanol solution and a coupling agent at a mass ratio of 15:1-2.

4. The antiviral high thermal conductivity gasket according to claim 3, characterized in that: The coupling agent is any one of 3-glycidyloxypropyltrimethoxysilane, dodecyltrimethoxysilane and octyltriethoxysilane.

5. The antiviral high thermal conductivity gasket according to claim 1, characterized in that: The chain extender is any one of terminal hydrogen-containing silicone oil, dimethyldiethoxysilane and methyltrimethoxysilane.

6. The antiviral high thermal conductivity gasket according to claim 1, characterized in that: The silane coupling agent is any one of 3-glycidyloxypropyltrimethoxysilane, dodecyltrimethoxysilane and octyltriethoxysilane.

7. The antiviral high thermal conductivity gasket according to claim 1, characterized in that: The inhibitor is acetylene cyclohexanol.

8. The antiviral high thermal conductivity gasket according to claim 1, characterized in that: The platinum catalyst is platinum (0)-1,3-diethene-1,1,3,3-tetramethyldisiloxane.

9. A method for preparing an antiviral high thermal conductivity gasket as claimed in any one of claims 1 to 6, characterized in that: The preparation method comprises the following steps: (1) Take materials by weight; (2) Preparation of component A: Take 50-58% of the total mass of vinyl silicone oil, 50% of the total mass of functional ceramic powder filler, platinum catalyst and silane coupling agent and stir evenly to obtain component A; (3) Preparation of component B: stir the remaining vinyl silicone oil, the remaining functional ceramic powder filler, hydrogen-containing silicone oil, chain extender and inhibitor evenly to obtain component B; (4) Component A and component B are vacuum-mixed and placed in a screw extruder for degassing. After extrusion, they are placed on a calendering line for calendering. After baking at 80-125° C., an antiviral high thermal conductivity gasket is obtained.

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