CN103102686A - Preparation method of aluminum hydroxide-silicon rubber composite material - Google Patents
Preparation method of aluminum hydroxide-silicon rubber composite material Download PDFInfo
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- CN103102686A CN103102686A CN2011103604813A CN201110360481A CN103102686A CN 103102686 A CN103102686 A CN 103102686A CN 2011103604813 A CN2011103604813 A CN 2011103604813A CN 201110360481 A CN201110360481 A CN 201110360481A CN 103102686 A CN103102686 A CN 103102686A
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- silicon rubber
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- aluminum hydroxide
- filler
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Abstract
The invention provides a preparation method of an aluminum hydroxide-silicon rubber composite material. The invention is characterized in that aluminum hydroxide is used as a filler, and silicon rubber is used as a carrier to prepare the composite heat-conducting silicon rubber in a direct-current field. The blending ratio of the aluminum hydroxide to the silicon rubber is 0:100-40:60. The heat conductivity of the composite heat-conducting silicon rubber prepared under the condition of an external direct-current field can be enhanced by 30%.
Description
Technical field
The present invention relates to a kind of preparation method of aluminium hydroxide-silicon rubber composite material, belong to new material technology field.
Background technology
At present, along with the development of miniature electronic technology to densification, miniaturization, its Working environment sharply changes to the high temperature direction.The heat that the use of heat-conducting silicon rubber can effectively be fallen apart and be produced except electronics, work-ing life and the working efficiency of raising electronics.Filled-type thermally conductive rubber is comprised of macromolecule matrix and high heat-conducting filler, and wherein heat conductive filler is main heat conduction carrier.When the amount of filler is smaller, can be dispersed in matrix each other, do not come in contact between filler and interact; When amount of filler acquired a certain degree, between filler, spacing reduced concurrent looks mutual effect, had formed similar chain and netted structure in matrix, was called the heat conduction network chain.Filler in the filled-in composite system and matrix can be seen respectively two thermal resistances as, and whole system is similar to a circuit, and by the minimum thermal resistance method as can be known, heat can be along logical first transmission of resistance to heat minimum.When filler system is inner form the heat conduction network chain parallel with direction of heat flow after, because the thermal resistance of filler is far smaller than macromolecule matrix, hot-fluid can be by the network chain transmission of formation.Therefore the thermal resistance of whole system diminishes, and heat conductivility improves.Mention in pertinent literature continuous carbon nano-tube is aligned in silica gel, the effective thermal conductivity of the carbon nanotube of the matrix material thermal conductivity ratio random alignment of preparation is doubled.Therefore how making the formation heat conduction network chain parallel with direction of heat flow in system is one of key that improves heat conductivility.
Through retrieval, we do not have to find the relevant report for preparing relevant aluminium hydroxide-silicon rubber composite material under DC electric field.
Summary of the invention
For addressing the above problem, the invention provides a kind of preparation method of aluminium hydroxide-silicon rubber composite material.
The technical scheme that the present invention takes is: a kind of preparation method of aluminium hydroxide-silicon rubber composite material is characterized by: take aluminium hydroxide as filler, silicon rubber is carrier, prepares compound heat-conducting silicon rubber under DC electric field.
In technique scheme, the blending ratio of aluminium hydroxide and silicon rubber is for being 0: 100-40: 60, and namely the maximum volume of filler is divided into 40%
Useful producing effect of the present invention is embodied in: the effective thermal conductivity that can improve whole system by applying extra electric field.The composite heat-conducting silicon rubber for preparing under the applying direct current electric field condition can improve effective thermal conductivity 30%.
Embodiment
Below tell about in detail the present invention by a specific embodiment.
Main raw material and plant and instrument comprise:
● aluminium hydroxide (H-WF---8SP);
● two-component silicone rubber (R-657)
● silane coupling agent (JH-N308)
● Heat Conduction method (ASTM5470) is selected in the test of material thermal conductivity, adopts LW-9091IR conductometer (the auspicious neck in Taiwan).Sample is general prepares 3 parts, averages after measurement.
Concrete preparation process:
● the processing of coupling agent: take the filler through 120 ℃ of dryings, add in the ethanol solution (5%) of coupling agent, sonic oscillation 10min under normal temperature, then 120 ℃ of dryings are to remove ethanol.
● add a certain amount of filler through coupling agent treatment in silicon rubber in batches, fully pour self-control stainless steel mould mould top and bottom after vacuum stirring into by certain thickness sheet rubber insulation isolation), mould top and bottom are joined with the positive and negative electrode of high-voltage DC power supply respectively, solidify 20min in 80 ℃.
Obtain through test: the composite heat-conducting silicon rubber for preparing under the applying direct current electric field condition, can improve effective thermal conductivity 30%, electrical effect fades away when the packing volume mark increases to 40%-50%.
Claims (2)
1. the preparation method of an aluminium hydroxide-silicon rubber composite material is characterized by: take aluminium hydroxide as filler, silicon rubber is carrier, prepares compound heat-conducting silicon rubber under DC electric field.
2. the preparation method of aluminium hydroxide-silicon rubber composite material as claimed in claim 1 is characterized by: the blending ratio of aluminium hydroxide and silicon rubber is for being 0: 100-40: 60.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103604813A CN103102686A (en) | 2011-11-14 | 2011-11-14 | Preparation method of aluminum hydroxide-silicon rubber composite material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103604813A CN103102686A (en) | 2011-11-14 | 2011-11-14 | Preparation method of aluminum hydroxide-silicon rubber composite material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103102686A true CN103102686A (en) | 2013-05-15 |
Family
ID=48310904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103604813A Pending CN103102686A (en) | 2011-11-14 | 2011-11-14 | Preparation method of aluminum hydroxide-silicon rubber composite material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103102686A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0598627A2 (en) * | 1992-11-19 | 1994-05-25 | Shin-Etsu Chemical Co., Ltd. | Silicone resin/silicone rubber composites, and methods for making them |
| CN101831181A (en) * | 2010-05-21 | 2010-09-15 | 浙江三元电子科技有限公司 | Addition thermal conductive insulation silicon rubber composite material and preparation method thereof |
-
2011
- 2011-11-14 CN CN2011103604813A patent/CN103102686A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0598627A2 (en) * | 1992-11-19 | 1994-05-25 | Shin-Etsu Chemical Co., Ltd. | Silicone resin/silicone rubber composites, and methods for making them |
| CN101831181A (en) * | 2010-05-21 | 2010-09-15 | 浙江三元电子科技有限公司 | Addition thermal conductive insulation silicon rubber composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 张毅，韩毓旺: "外加直流电场制备导热硅橡胶", 《化工新型材料》, vol. 38, no. 6, 15 June 2010 (2010-06-15) * |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20130515 |