Surface-Modified Inorganic Nitride via Onium Salt Adsorption
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Solution Overview
Problem
Inorganic nitrides, such as boron nitride, face challenges in surface modification due to a limited number of hydroxyl groups, making it difficult to achieve sufficient reaction with coupling agents, which hinders their dispersibility and thermal conductivity when mixed with organic substances.
Innovation Solution
The use of onium salts, specifically pyridinium, imidazolium, pyrrolidinium, piperidinium, and triethylenediamine salts, to modify the surface of inorganic nitrides, improving their dispersibility and thermal conductivity by forming bonds that enhance alignment with curable compounds exhibiting liquid crystallinity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional coupling agents (zirconate, zirconium aluminate, or aluminate) are used to treat the surface of inorganic nitride, then some surface modification is achieved, but the modification is insufficient due to the small number of hydroxyl groups on the inorganic nitride surface
Solution Approach 1:
The patent changes the chemical parameter of the surface treatment by replacing conventional coupling agents with onium salts (quaternary ammonium salts, phosphonium salts, or sulfonium salts). This parameter change enables effective surface modification despite the limited hydroxyl groups on inorganic nitride, as onium salts can interact with the surface through different chemical mechanisms that do not rely heavily on hydroxyl group availability.
Solution Approach 2:
The onium salt acts as an intermediary substance that facilitates better interaction between the inorganic nitride and organic substances. The onium salt molecules adsorb onto the inorganic nitride surface and provide functional groups that enhance affinity with organic materials, thereby mediating the interface between inorganic and organic phases.
2Temperature
If inorganic nitride is mixed with organic substances to improve thermal conductivity, then thermal management performance is enhanced, but the dispersibility of inorganic nitride in organic substance is insufficient
Solution Approach 1:
The patent modifies the surface chemical parameters of inorganic nitride by applying onium salt treatment, which changes the surface energy and chemical functionality. This parameter change enables better compatibility and dispersibility in organic substances while maintaining the thermal conductivity benefits of the inorganic nitride filler.
Solution Approach 2:
The patent creates a composite surface structure on the inorganic nitride by combining the inorganic core with an organic-like onium salt surface layer. This composite structure allows the material to maintain its inorganic thermal conductivity properties while gaining organic compatibility for better dispersibility in organic resin matrices.
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 demonstrate improved thermal conductivity and dispersibility, leading to enhanced thermal management properties in materials containing these nitrides.
Implementation Method 1
a surface-modified inorganic nitride according to any one of (1) to (8), and a method for manufacturing the surface-modified inorganic nitride according to any one of (1) to (8). (17) A method for manufacturing the surface-modified inorganic nitride according to any one of (1) to (8), comprising a step of bringing the inorganic nitride into contact with the onium salt
Implementation Method 2
the inorganic nitride is required to exhibit further improved affinity with the organic substance. For example, in a case where an inorganic nitride such as boron nitride is used as a thermally conductive material
Data Source
AI summary
Provided are a novel surface-modified inorganic nitride, a composition, a thermally conductive material, a device with a thermally conductive layer, and a method for manufacturing a surface-modified inorganic nitride. The surface-modified inorganic nitride of the embodiment of the present invention contains an inorganic nitride and an onium salt adsorbed onto a surface of the inorganic nitride.