Metal Oxide Nanoparticle and Silsesquioxane Composite
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Solution Overview
Problem
Existing methods for producing high-refractive index and high-dielectric films in electron devices face challenges in uniformly dispersing hydrophilic metal oxides in hydrophobic resins, leading to aggregation and suboptimal physical properties, and are costly due to surface modification requirements.
Innovation Solution
A composite of metal oxide nanoparticles and silsesquioxane polymer is formed by reacting silsesquioxane polymers with terminal silanol groups and metal oxide nanoparticles having hydroxyl or alkoxy groups in a mixed solvent with a phase transfer catalyst, ensuring uniform dispersion and bonding of silicon atoms, thereby preventing aggregation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydrophilic metal oxide is dispersed in hydrophobic resin, then refractive index and dielectric properties are improved, but uniform dispersion is difficult and aggregation occurs
Solution Approach 1:
The patent changes the surface parameters of metal oxide nanoparticles by introducing silane coupling agents that modify the surface chemistry. This allows the hydrophilic metal oxide to be compatible with hydrophobic resin matrices, achieving both uniform dispersion and improved physical properties without aggregation
Solution Approach 2:
The patent creates a composite material system where metal oxide nanoparticles are combined with resin through surface modification. The composite structure maintains the beneficial properties of metal oxide (high refractive index, high dielectric constant) while achieving compatibility with the resin matrix through controlled surface characteristics
2Stability of the object's composition
If surface modification is performed on metal oxide to improve dispersibility, then dispersion uniformity is improved, but production cost increases
Solution Approach 1:
The patent employs silane coupling agents with specific molecular structures that provide effective surface modification at low concentrations. By optimizing the parameters of the coupling agent (molecular weight, functional groups, concentration), the patent achieves good dispersibility without requiring excessive amounts of expensive modifiers
Solution Approach 2:
The patent uses silane coupling agents as intermediary substances that bridge the hydrophilic metal oxide surface and the hydrophobic resin matrix. This intermediary layer enables compatibility between incompatible materials, achieving uniform dispersion while controlling production costs through efficient use of the coupling agent
3Ease of manufacture
If metal oxide is simply dispersed in resin, then production process is simplified, but aggregation occurs during curing and physical properties are not attained
Solution Approach 1:
The patent performs preliminary surface modification of metal oxide nanoparticles with silane coupling agents before mixing with resin. This preliminary action prevents aggregation during the curing process by establishing stable surface characteristics that maintain dispersion uniformity throughout subsequent processing steps
Solution Approach 2:
The patent modifies surface parameters of metal oxide to create a stable interface with the resin matrix. This parameter change ensures that the dispersion remains uniform during curing, allowing the composite to achieve the desired physical properties (high refractive index, high dielectric constant) without aggregation
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 approach allows for the production of high-quality, uniformly dispersed metal oxide-containing films with improved refractive index and dielectric properties, reducing the likelihood of defects like cracking, and eliminates the need for costly surface modification steps.
Implementation Method 1
reacting a silsesquioxane polymer having a silanol group at a terminal, or a silane monomer(s), with metal oxide nanoparticles having a hydroxyl group or an alkoxy group on the surface in a mixed solvent of an aqueous solvent and an organic solvent in the presence of a phase transfer catalyst
Implementation Method 2
silicon atoms of the silsesquioxane polymer are bound with the surface of the metal oxide nanoparticles via oxygen atoms
Data Source
AI summary
[Problem] An object of the present invention is to provide a composite of metal oxide nanoparticles and a silsesquioxane polymer, which can form a high-quality cured film wherein aggregation and the like of metal oxide do not occur during a curing process and the metal oxide is uniformly dispersed.[Means for Solution] Provided are: a method of producing a composite of metal oxide nanoparticles and a silsesquioxane polymer, the method comprising reacting a silsesquioxane polymer having a silanol group at a terminal, or a silane monomer with metal oxide nanoparticles having a hydroxyl group or an alkoxy group on the surface in an aqueous solvent in the presence of a phase transfer catalyst; and a composite produced by the method.