Thiol-ene Polymer Composites with Antioxidant Additives
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Solution Overview
Problem
The thiol-ene system used as a host matrix for semiconductor nanocrystals in display devices suffers from low luminous efficiency and brightness due to oxidation, and has poor storage stability, leading to degradation of luminous efficiency and luminance.
Innovation Solution
A composition comprising a monomer mixture of a first monomer with multiple thiol groups and a second monomer with multiple carbon-carbon unsaturated bonds, along with additives such as zinc compounds, indium compounds, ascorbic acid, or tocopherol, to enhance storage stability and prevent undesired curing, forming a polymer composite that includes light emitting particles like quantum dots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a thiol-ene system is used as a host matrix for semiconductor nanocrystals, then luminous efficiency and brightness are improved, but storage stability deteriorates
Solution Approach 1:
The patent introduces antioxidants (ascorbic acid, tocopherol, citric acid) and metal compounds (zinc, indium) as additives to the thiol-ene monomer system. These additives chemically interact with the system to prevent oxidation and premature curing, thereby maintaining storage stability without compromising the luminous efficiency that the thiol-ene system provides.
2Reliability
If a thiol-ene system is used as a host matrix, then degradation of luminous efficiency is reduced, but storage stability deteriorates
Solution Approach 1:
The patent uses antioxidants (ascorbic acid, tocopherol, citric acid) as intermediary substances that mediate between the thiol-ene monomer system and oxygen. These intermediaries prevent oxidation reactions that would otherwise cause premature curing and degradation, thereby maintaining both luminous efficiency and storage stability.
3Illumination intensity
If a thiol-ene system is used, then luminance degradation is decreased, but storage stability deteriorates
Solution Approach 1:
The patent modifies the chemical composition of the thiol-ene system by adding antioxidants and metal compounds. These additives change the chemical parameters of the system to prevent oxidation and premature curing, thereby maintaining luminance stability while improving storage stability.
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 solution improves the storage stability of the thiol-ene system, maintains luminous efficiency, and prevents premature curing, ensuring consistent performance and extended shelf life of the light emitting particles in display devices.
Implementation Method 1
the semiconductor nanocrystals have low luminous efficiency and brightness due to oxidation
Implementation Method 2
a monomer mixture including a first monomer having at least two thiol groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its end
Data Source
AI summary
A composition including: a monomer mixture including a first monomer having at least two thiol groups at its terminal end and a second monomer having at least two carbon-carbon unsaturated bond-containing groups at its terminal end; and at least one additive selected from a zinc compound, an indium compound, ascorbic acid or a salt thereof, citric acid or a salt thereof, a tocopherol, and a tocotrienol.