Upconversion Nanoparticle Resin Molded Body Dispersion
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Solution Overview
Problem
The luminous efficiency of resin molded bodies containing upconversion nanoparticles is limited due to the localization of surfactants around the nanoparticles, which hinders the effective dispersion and emission of light.
Innovation Solution
A composition comprising upconversion nanoparticles with rare earth elements, coated with unsaturated fatty acids, and a curable component containing an alkylene glycol group, which improves the dispersion and emission efficiency when cured, particularly using UV-curable compounds to enhance luminous efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a surfactant is used to disperse upconversion nanoparticles, then the nanoparticles can be dispersed in the composition, but the luminous efficiency of the resulting resin molded body is limited because the surfactant is localized around the nanoparticles
Solution Approach 1:
The invention extracts and removes the surfactant from the composition entirely, replacing it with a dispersion method based on particle surface coating and controlled polymerization. This eliminates the energy loss associated with surfactant localization while maintaining nanoparticle dispersion stability.
Solution Approach 2:
The invention changes the dispersion mechanism from surfactant-based to particle surface coating-based, and controls the polymerization process to achieve uniform distribution. By changing these parameters, the system achieves both good dispersion and high luminous efficiency without the energy loss of traditional surfactant methods.
2Illumination intensity
If upconversion nanoparticles are added to the composition, then light emission can be achieved, but the luminous efficiency is reduced due to particle aggregation and poor dispersion
Solution Approach 1:
The invention performs preliminary surface coating of the upconversion nanoparticles with unsaturated fatty acids before adding them to the composition. This preliminary action prevents particle aggregation during polymerization, ensuring uniform dispersion and maintaining high luminous efficiency while achieving strong light emission.
3Ease of manufacture
If traditional polymerization methods are used with upconversion nanoparticles, then the resin molded body can be formed, but the luminous efficiency is limited due to insufficient light emission
Solution Approach 1:
The invention changes the polymerization parameters by using a composition with specific molecular weight ratios and controlling the polymerization process to occur after nanoparticle dispersion is established. This results in uniform nanoparticle distribution throughout the resin matrix, maintaining both ease of manufacture and high luminous efficiency with strong light emission.
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 approach results in a resin molded body with improved luminous efficiency, as demonstrated by higher luminescence quantum yields compared to traditional compositions, indicating better light emission and dispersion properties.
Implementation Method 1
particles containing an upconversion material that receives excitation light in a first wavelength range and emits light in a second wavelength range shorter than the first wavelength range
Implementation Method 2
a curable component, in which the upconversion material contains a rare earth element, and the curable component includes a compound having an alkylene glycol group
Data Source
AI summary
Provided is a resin molded body with an improved luminous efficiency. Also provided is a composition for obtaining the resin molded body, and a method for producing a resin molded body.A composition including: particles containing an upconversion material that receives excitation light in a first wavelength range and emits light in a second wavelength range shorter than the first wavelength range; and a curable component, in which the upconversion material contains a rare earth element, and the curable component includes a compound having an alkylene glycol group.