Silane-Modified Phosphor Dispersion in Polymeric Matrices
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Solution Overview
Problem
Conventional methods for dispersing luminescent phosphors in polymeric matrices result in aggregation, leading to loss of light transmission and impaired light converting properties, with limited success in achieving uniform dispersion at high particle concentrations.
Innovation Solution
The use of surface-modified phosphor materials prepared by mixing a phosphor material with a liquid and a silane coupling agent solution, followed by heating in an inert atmosphere, to enhance dispersion and maintain photoluminescent properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If luminescent phosphors are dispersed in polymeric matrices using conventional methods, then the phosphors can be incorporated into the matrix, but aggregation occurs leading to loss of light transmission and impaired light converting properties
Solution Approach 1:
The patent introduces silane coupling agents as intermediary substances that coat the phosphor particles. These silane coatings act as mediators between the inorganic phosphor particles and the organic polymeric matrix, improving interfacial compatibility and preventing particle aggregation. The silane coupling agents create a bridging layer that maintains particle dispersion and preserves light transmission properties even at high phosphor concentrations.
Solution Approach 2:
The patent modifies the surface properties of phosphor particles by changing their chemical composition through silane treatment. This parameter change in surface chemistry transforms the phosphor surface from hydrophilic to hydrophobic character, improving compatibility with the polymeric matrix and preventing aggregation that would otherwise occur at high concentrations.
2Quantity of substance
If luminescent phosphors are dispersed in polymeric matrices, then the phosphors can be incorporated, but aggregation occurs leading to impaired light converting properties
Solution Approach 1:
The silane coupling agents serve as intermediaries that maintain the optical properties of phosphors by preventing aggregation. The coating layer ensures that phosphor particles remain individually dispersed, preserving their light converting capabilities even at high concentrations where aggregation would normally occur and impair optical performance.
Solution Approach 2:
By modifying the surface chemistry of phosphor particles through silane treatment, the patent changes the interfacial parameters between phosphor and polymer. This parameter change prevents particle-particle interactions that lead to aggregation, thereby maintaining the photoluminescent properties and light converting efficiency of the phosphors.
3Quantity of substance
If high particle concentrations of phosphors are used in polymeric matrices, then more light conversion capacity is achieved, but aggregation occurs resulting in loss of light transmission
Solution Approach 1:
The silane coupling agents act as intermediary coating layers that enable high phosphor loading without aggregation. The coating provides steric and chemical barriers that keep particles separated even at high concentrations, allowing the system to maintain high light transmission while incorporating sufficient phosphor for effective light conversion.
Solution Approach 2:
The patent changes the surface energy parameters of phosphor particles through silane modification. This parameter change in surface hydrophobicity allows particles to remain dispersed in the hydrophobic polymeric matrix at high concentrations, preventing the aggregation that would otherwise block light transmission pathways.
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 achieves uniform dispersion of luminescent phosphors at high concentrations within polymeric matrices, maintaining effective light conversion and transmission while preventing aggregation.
Implementation Method 1
a surface-modified phosphor material comprising a phosphor material and a silane material
Implementation Method 2
Luminescent phosphors can be used to convert a first wavelength of light from a source into a second, more desirable wavelength of light
Implementation Method 3
heating the surface-modifying phosphor reaction mixture in an inert atmosphere
Data Source
AI summary
In one aspect, the disclosure relates to compositions comprising a surface-modified phosphor material comprising a phosphor material and a silane, methods of making same, and articles comprising same. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.