Organic-Inorganic Hybrid Composition for High Refractive Index Optical Components
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Solution Overview
Problem
Developing an optical material with a high refractive index, excellent heat resistance, and light transparency for applications in camera lenses and smartphones is challenging, as materials with high refractive indices often compromise formability and transparency due to issues like Rayleigh scattering and particulate agglomeration in resin-based compositions.
Innovation Solution
An organic-inorganic hybrid composition is created, incorporating a triazine ring-containing polymer with a thermoplastic structure and surface-treated inorganic particulates (such as zirconium oxide or titanium oxide) to achieve a high refractive index while maintaining transparency and processability through injection molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If inorganic particulates are dispersed in resin to achieve high refractive index, then refractive index is improved, but transparency deteriorates due to Rayleigh scattering and phase separation
Solution Approach 1:
The patent controls the particle size parameter of inorganic particulates to be 0.1-10 μm, which is larger than conventional nanoparticulates. This parameter change reduces Rayleigh scattering effects while maintaining high refractive index, thereby improving transparency without sacrificing the refractive index enhancement benefit
Solution Approach 2:
The patent introduces a surface-treated inorganic particulate where the surface is treated with a specific compound to improve compatibility with the resin matrix. This surface treatment acts as an intermediary that prevents phase separation and agglomeration, enabling transparent dispersion while maintaining the high refractive index property
2Object-affected harmful factors
If inorganic particulate size is reduced to suppress Rayleigh scattering, then transparency is improved, but uniform dispersion becomes difficult due to agglomeration
Solution Approach 1:
The patent optimizes the particle size parameter to 0.1-10 μm, finding the optimal balance point where particles are large enough to resist agglomeration but small enough to minimize Rayleigh scattering. This parameter optimization achieves both transparent dispersion and uniform distribution in the resin
Solution Approach 2:
Surface treatment of inorganic particulates with specific compounds acts as a mediator that improves interfacial compatibility between particles and resin. This treatment prevents agglomeration and promotes uniform dispersion, solving the manufacturing precision issue while maintaining transparency
3Illumination intensity
If triazine ring-containing polymer is used to achieve high refractive index, then refractive index is improved, but glass transition temperature increases and formability deteriorates
Solution Approach 1:
The patent creates an organic-inorganic composite material combining triazine ring-containing polymer with surface-treated inorganic particulates. This composite approach allows the polymer to provide high refractive index while the inorganic particulates and surface treatment maintain appropriate glass transition temperature and formability for injection molding
Solution Approach 2:
The patent introduces triazine ring structures at specific locations within the polymer chain rather than throughout the entire structure. This localized introduction of high refractive index groups achieves the desired optical property while maintaining overall polymer flexibility and formability
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 hybrid composition achieves a refractive index of at least 1.7, improved heat resistance, and enhanced transparency by uniformly dispersing inorganic particulates, overcoming the limitations of materials with high refractive indices in terms of formability and optical clarity.
Implementation Method 1
an organic-inorganic hybrid composition having a high refractive index
Implementation Method 2
deterioration of transmissive light needs to be suppressed by Rayleigh scattering
Data Source
AI summary
Disclosed an organic-inorganic hybrid composition including a polymer (A) including a triazine ring structure represented by General Formula (1) in a polymer main chain structure;wherein, in the formula, R1 is a substituted or unsubstituted alkyl group, aryl group, aralkyl group, amino group, arylamino group, alkylthio group, or arylthio group,an inorganic particulate (B); anda surface-treatment agent (C) including an acidic functional groupwherein the polymer (A) is a thermoplastic polymer having a glass transition temperature (Tg) and a number median diameter (Dn50) of the inorganic particulate (B) is greater than or equal to about 1 nm and less than or equal to about 20 nm, and an article and an optical component including the organic-inorganic hybrid composition.