Pre-Cured Thermal Conductive Gel with Branched Cross-Linking
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Solution Overview
Problem
Single-component thermal conductive gels face challenges in achieving high extrusion rates while maintaining low oil bleeding rates due to the trade-off between cross-linking density and oil seepage, as addressed by existing technologies like CN115403933A.
Innovation Solution
A pre-cured single-component thermal conductive gel is prepared using branched hydrogen-containing silicone oil and modified thermal conductive powder, where the branched silicone oil forms a large cross-linking network and the modified powder has both long-chain alkyl and vinyl groups for enhanced bonding, combined with a platinum catalyst to achieve high thermal conductivity, extrusion rate, and low oil bleeding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cross-linking density is increased to improve extrusion rate, then the extrusion rate improves, but oil seepage increases due to polymer-powder separation
Solution Approach 1:
The patent changes the chemical structure parameters of the cross-linking agent from conventional linear structures to branched structures with specific functionality. The branched hydrogen-containing silicone oil contains multiple hydrogen atoms that can form cross-links, creating a three-dimensional network structure that improves extrusion rate while maintaining low oil seepage through enhanced polymer-powder bonding.
Solution Approach 2:
The patent creates a composite system by combining branched hydrogen-containing silicone oil with vinyl-terminated silicone oil and modified thermal conductive powder. This composite formulation allows the branched structure to form a cross-linked network that simultaneously achieves high extrusion rate and low oil seepage through synergistic effects of the different components.
2Reliability
If the cross-linking density is decreased to reduce oil seepage, then oil seepage improves, but extrusion rate decreases
Solution Approach 1:
The patent introduces branched hydrogen-containing silicone oil with specific molecular structure parameters that enable controlled cross-linking. The branched structure provides multiple bonding sites that create a three-dimensional network, allowing the system to maintain low oil seepage while achieving high extrusion rate through enhanced structural integrity.
Solution Approach 2:
The branched hydrogen-containing silicone oil acts as an intermediary cross-linking agent between the vinyl-terminated silicone oil and modified thermal conductive powder. It forms a bridging network that simultaneously satisfies the requirements for low oil seepage and high extrusion rate through its unique molecular structure and bonding capabilities.
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 gel exhibits excellent thermal conductivity, high extrusion rate, and low oil bleeding rate, outperforming conventional gels by maintaining strong polymer-powder bonding and reducing polymer precipitation.
Implementation Method 1
the branched hydrogen-containing silicone oil is prepared by a hydrosilylation reaction of a hydrogen-terminated silicone oil and a side-chain vinyl silicone oil under the action of a platinum catalyst
Implementation Method 2
the modified thermal conductive powder is prepared by modifying thermal conductive powder with a modifier; and wherein, the modifier is composed of long-chain alkyl silane and vinyl silane
Data Source
AI summary
Disclosed are a pre-cured single-component thermal gel and a preparation method therefor. The pre-cured single-component thermal gel is prepared from the following components in parts by weight and a platinum catalyst: 100 parts of vinyl-terminated silicone oil, 5-30 parts of branched hydrogen-containing silicone oil, 500-2500 parts of modified thermally conductive powder, and 0.01-0.3 part of an inhibitor; the content of the platinum catalyst is 2 ppm to 10 ppm on the basis of the mass of platinum; the modified thermally conductive powder is prepared by modifying thermally conductive powder with a modifier; and the modifier consists of long-chain alkyl silane and vinyl silane.