Photocurable Composition Suppressing Metal Oxide Nanoparticle Localization
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Solution Overview
Problem
The formation of high refractive index materials through curing compositions containing metal oxide nanoparticles and (meth)acrylate monomers often results in phase separation, leading to non-uniform cured products due to localization of metal oxide particles.
Innovation Solution
Incorporating specific amine and imine compounds into the photocurable liquid composition, including metal oxide nanoparticles and (meth)acrylate monomers, to suppress the localization of metal oxide nanoparticles and promote uniform curing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a composition containing metal oxide nanoparticles and (meth)acrylate monomers is cured to form high refractive index material, then the refractive index is improved, but phase separation occurs leading to non-uniform cured product
Solution Approach 1:
A coupling agent is introduced as an intermediary substance that chemically bonds to both the metal oxide nanoparticles and the (meth)acrylate monomers. This coupling agent has functional groups that interact with metal oxide surfaces and ethylenically unsaturated bonds that participate in polymerization, thereby bridging the inorganic nanoparticles and organic polymer matrix to prevent phase separation while maintaining high refractive index.
Solution Approach 2:
The invention creates a composite material system where metal oxide nanoparticles are uniformly dispersed within a polymer matrix formed by (meth)acrylate monomers. The composite structure combines the high refractive index property of metal oxides with the polymer matrix, achieving both high refractive index and compositional uniformity through proper integration of phases.
2Illumination intensity
If metal oxide nanoparticles are dispersed in (meth)acrylate monomers, then high refractive index is achieved, but localization of metal oxide particles occurs during curing
Solution Approach 1:
The coupling agent serves as a mediator that attaches to metal oxide nanoparticle surfaces and provides anchoring points for the polymer matrix. This prevents nanoparticle aggregation and localization during curing by creating a stable interface between inorganic and organic phases, ensuring uniform distribution throughout the cured product.
Solution Approach 2:
The invention modifies the surface properties of metal oxide nanoparticles by introducing coupling agents, changing parameters such as surface charge, hydrophobicity, and chemical reactivity. These parameter changes improve compatibility with the polymer matrix and prevent particle localization during the curing process.
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 addition of these nitrogen-containing compounds enables the formation of a cured product with suppressed metal oxide nanoparticle localization, resulting in a more uniform and transparent high refractive index material.
Implementation Method 1
a photopolymerization initiator (C)... exposing the shaped photocurable liquid composition
Data Source
AI summary
A photocurable liquid composition capable of forming a cured product in which localization of metal oxide nanoparticles is suppressed, a cured product of the photocurable liquid composition, and a method for producing a cured product using the photocurable liquid composition. As a nitrogen-containing compound, at least one of an amine compound having a specific structure and an imine compound having specific structure is added to the photocurable liquid composition including the photopolymerizable monomer, metal oxide nanoparticles, and a photopolymerization initiator.