Surface-Modified Inorganic Nitride for Thermal Conductivity
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Solution Overview
Problem
Existing methods for surface modification of inorganic nitrides, such as those described in JP2006-257392A, JP2001-192500A, and JP4858470B, face challenges in achieving sufficient surface modification due to limited hydroxyl groups on the inorganic nitride surface and require complex stepwise processes, which hinder the development of materials with high thermal conductivity and durability.
Innovation Solution
The use of an aldehyde compound for surface modification of inorganic nitrides, specifically represented by General Formula I, which forms covalent bonds with the nitride surface, enhancing adsorptivity and allowing for a simpler manufacturing process, resulting in a resin composition that produces thermally conductive materials with improved thermal conductivity and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silane, aluminate, or titanate coupling agents are used to modify the surface of inorganic nitride, then the dispersibility and affinity are improved, but the modification is insufficient due to limited hydroxyl groups on the surface
Solution Approach 1:
The patent changes the chemical parameter of the modifying agent from traditional coupling agents (silane, aluminate, titanate) to isocyanate compounds, which have different reactivity characteristics that overcome the limitation of insufficient hydroxyl groups on the inorganic nitride surface
Solution Approach 2:
The patent creates a composite surface structure by forming covalent bonds between the isocyanate group and the inorganic nitride surface, generating a modified surface layer that combines the inorganic nitride core with organic isocyanate functional groups for enhanced performance
2Reliability
If traditional coupling agents are used for surface modification, then some affinity improvement is achieved, but the process becomes complicated and requires stepwise reactions
Solution Approach 1:
The patent merges the modification steps into a single reaction process where the isocyanate compound directly reacts with the inorganic nitride surface in one step, eliminating the need for multiple stepwise reactions required by traditional coupling agents
Solution Approach 2:
The isocyanate group acts as an intermediary that facilitates direct bonding to the inorganic nitride surface, enabling a simplified one-step modification process while achieving effective surface functionalization
3Temperature
If inorganic nitride is used for thermal conductivity, then heat dissipation performance is achieved, but the affinity with resin binder is insufficient without surface modification
Solution Approach 1:
The patent changes the surface chemical parameters of the inorganic nitride by introducing isocyanate functional groups, which fundamentally alter the surface properties to achieve both high thermal conductivity and strong resin binder affinity simultaneously
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 surface-modified inorganic nitrides exhibit high adsorptivity and thermal conductivity, enabling the creation of durable thermally conductive materials with enhanced thermal conductivity and improved dispersibility in organic solvents, suitable for various applications including heat dissipation and lubrication.
Implementation Method 1
an aldehyde compound exhibits markedly high adsorptivity with respect to the inorganic nitride
Data Source
AI summary
A surface-modified inorganic substance is obtained by performing surface modification on a inorganic nitride by using an aldehyde compound such as a compound represented by General Formula I. A resin composition contains the surface-modified inorganic substance and a monomer having a group selected from the group consisting of an oxetanyl group, an oxiranyl group, and a (meth)acrylate group.ZZ—XX—CHO General Formula IIn the formula, ZZ represents a group selected from the group consisting of an amino group, a thiol group, a hydroxyl group, an isocyanate group, a carboxyl group, a carboxylic acid anhydride group, an oxetanyl group, an oxiranyl group, and a (meth)acrylate group, and XX represents a divalent linking group.