Silicone Thermal Interface Material for Immersion Cooling
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Solution Overview
Problem
Silicone-based thermal interface materials used in air-cooled environments degrade or swell when submerged in mineral oil, leading to reduced heat transfer efficiency in immersion cooling systems due to solubility compatibility issues.
Innovation Solution
A silicone-based thermal interface material with a solubility parameter shifted beyond the range of mineral oil by incorporating a thermally conductive material and a silicone-based polymeric material, such as PDMS, functionalized to increase its solubility parameter, preventing mineral oil solubility and swelling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional silicone-based thermal interface material is used in an air-cooled environment, then it provides good heat transfer efficiency, but it degrades or swells when submerged in mineral oil, leading to reduced heat transfer efficiency in immersion cooling systems
Solution Approach 1:
The patent modifies the solubility parameter of the silicone-based polymer by functionalizing it with specific side chains or crosslinking agents. This parameter change ensures that the polymer's solubility parameter is sufficiently different from mineral oil, preventing swelling and degradation while maintaining thermal conductivity for effective heat transfer in both air-cooled and immersion-cooled environments
Solution Approach 2:
The patent creates a composite thermal interface material by combining silicone-based polymer with functional additives or crosslinking agents that modify its chemical structure. This composite approach enhances the polymer's resistance to mineral oil while preserving its thermal conductivity properties, resolving the contradiction between reliability in different cooling environments and compositional stability
2Adaptability or versatility
If the solubility parameter of silicone-based material is close to that of mineral oil, then it ensures compatibility with the polymer structure, but it causes swelling and heat transfer performance degradation in immersion cooling
Solution Approach 1:
The patent systematically adjusts the solubility parameter of the silicone-based polymer through chemical functionalization, ensuring it falls outside the solubility range of mineral oil. This parameter modification prevents swelling and maintains heat transfer performance while preserving the material's adaptability to different cooling system requirements
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The modified silicone-based thermal interface material maintains heat transfer efficiency in both air-cooled and immersion-cooled environments by reducing mineral oil solubility, thus preventing performance degradation.
Implementation Method 1
The silicone-based polymeric material may have a solubility parameter that is not less than 9.09 cal1/2 cm−3/2. Shifting the solubility parameter of a silicone-based material away from the solubility parameter of an immersion cooling fluid may reduce/prevent swelling
Implementation Method 2
The silicone-based thermal interface material includes a thermally conductive material and a silicone-based polymeric material
Data Source
AI summary
In an example, a silicone-based thermal interface material includes a thermally conductive material and a silicone-based polymeric material having a solubility parameter that is not less than 9.09 cal1/2 cm−3/2.