Organically Modified Boron Nitride Particle Production
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Solution Overview
Problem
Existing methods for producing boron nitride particles with high organic modification ratios face challenges such as low thermal conductivity, poor formability, and adhesion due to the hydrophobic nature of the boron nitride powder, which hinders efficient dispersion in water and reaction with organic molecules. Additionally, batch-type reactors limit productivity, and controlling surface characteristics and impurities is difficult.
Innovation Solution
A continuous production method involving pretreatment of boron nitride particles and their continuous contact with an aqueous organic modifier in a subcritical state, either in the presence of an acid or a base, to enhance solubility, remove impurities, and achieve a high organic modification ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If boron nitride powder is used as a thermally conductive material, then thermal conductivity is improved, but affinity with resin deteriorates leading to low filling amount
Solution Approach 1:
The invention changes the surface chemical parameters of boron nitride powder by introducing organic functional groups through modification. This alters the surface energy and chemical composition, enabling better compatibility with resin matrices while preserving the bulk thermal conductivity properties of the boron nitride particles.
Solution Approach 2:
The invention creates a composite structure by combining boron nitride core particles with organic modifier coatings. This composite approach allows the inner boron nitride to provide thermal conductivity while the outer organic layer provides resin compatibility and interfacial bonding, resolving the contradiction between thermal performance and material affinity.
2Temperature
If high filling amount of boron nitride powder is achieved, then thermal conductivity is improved, but void formation increases and viscosity drastically increases
Solution Approach 1:
By modifying the surface parameters of boron nitride powder with organic groups, the invention changes the interfacial properties between particles and resin. This reduces particle aggregation and improves dispersion, allowing higher filling amounts without causing excessive viscosity increase or void formation, thus maintaining molding processability.
3Manufacturing precision
If batch-type reactor is used for organic modification, then modification can be conducted, but productivity is limited
Solution Approach 1:
The invention transitions from batch-type to continuous-flow reactor system for organic modification. This allows the modification process to operate continuously with steady-state conditions, maintaining high modification ratios while significantly increasing production throughput and efficiency through uninterrupted material flow and processing.
4Temperature
If boron nitride powder with hydrophobic surface is used, then thermal conductivity is maintained, but dispersion in water deteriorates
Solution Approach 1:
The invention changes the surface hydrophobicity parameters of boron nitride powder by introducing polar or hydrophilic organic functional groups. This modification alters the surface energy and wettability, enabling better dispersion in aqueous media while preserving the thermal conductivity properties of the boron nitride core structure.
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
This method enables the stable and efficient production of boron nitride particles with high organic modification ratios, improving thermal conductivity, formability, and adhesion, while also increasing productivity through continuous reactor systems.
Implementation Method 1
contacting step for continuously supplying a boron nitride with pretreatment and an organic modifier to continuously contact them with an aqueous material in a subcritical state
Implementation Method 2
method for continuously producing an organically modified boron nitride particle comprising: contacting step for continuously supplying a boron nitride with pretreatment and an organic modifier to continuously contact them with an aqueous material in a subcritical state
Implementation Method 3
the pretreatment comprises any one or more kinds selected from adding an acid to the boron nitride, adding a base to the boron nitride, adding an oxidant to the boron nitride, adding a reductant to the boron nitride, and conducting a hydrothermal treatment or a solvothermal treatment to the boron nitride
Data Source
AI summary
The problem to be solved is to provide a boron nitride particle stably and efficiently with a high organic modification ratio.To solve the problem, the continuous production method according to the present invention comprises contacting step for continuously supplying a boron nitride with pretreatment and an organic modifier to continuously contact them with an aqueous material in a subcritical state in a presence of an acid or a base. The pretreatment comprises any one or more kinds selected from adding an acid to the boron nitride, adding a base to the boron nitride, adding an oxidant to the boron nitride, adding a reductant to the boron nitride, and conducting a hydrothermal treatment or a solvothermal treatment to the boron nitride.