Liquid Crystal Composition for Alignment and Post-Cleaning Adhesion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal compositions using silicon-containing compounds as aligning agents face issues with adhesiveness between the liquid crystal layer and adjacent layers after solvent cleaning, leading to potential peeling and reduced adhesion.
Innovation Solution
A liquid crystal composition comprising a specific compound represented by Formula (1) and a liquid crystal compound, with a silicon atom content of 17.5% to 40.0%, which enhances aligning properties and adhesiveness by promoting compatibility and surface biasing, thereby improving adhesion to adjacent layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a silicon-containing compound is used as an aligning agent to restrict aligning properties of the liquid crystal compound, then aligning properties are improved, but adhesiveness between the liquid crystal layer and adjacent layers deteriorates after solvent cleaning
Solution Approach 1:
The patent changes the chemical structure parameters of the silicon-containing compound by introducing specific functional groups (carboxyl, hydroxyl, or amino groups) and controlling the silicon atom content within 17.5% to 40.0%. This parameter optimization allows the compound to maintain aligning properties while improving adhesiveness after solvent cleaning
Solution Approach 2:
The patent creates a composite aligning agent system by combining the silicon-containing compound with specific functional groups (carboxyl, hydroxyl, or amino groups) and controlling the silicon content ratio. This composite structure enables the material to simultaneously provide alignment restriction and enhanced adhesion to adjacent layers
2Manufacturing precision
If the silicon atom content in the aligning agent is increased to improve aligning properties, then alignment restriction is enhanced, but adhesiveness to adjacent layers deteriorates
Solution Approach 1:
The patent identifies and optimizes the silicon atom content parameter within a specific range (17.5% to 40.0%). This parameter change balances the competing requirements: sufficient silicon content for aligning properties while limiting excessive silicon that would harm adhesiveness
3Manufacturing precision
If a fluorine-based aligning agent with perfluoroalkyl chain is used to restrict aligning properties, then aligning properties are improved, but environmental pollution increases
Solution Approach 1:
The patent replaces the environmentally problematic fluorine-based aligning agent with a silicon-containing compound that has lower environmental impact. This substitution maintains the functional performance (aligning properties) while eliminating the harmful environmental effects associated with fluorinated compounds
Solution Approach 2:
The patent changes the chemical composition parameter from fluorine-based to silicon-based aligning agents. This fundamental parameter change eliminates the environmental pollution issue while maintaining or improving the aligning functionality
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 composition achieves excellent aligning properties and adhesiveness between the liquid crystal layer and adjacent layers, even after solvent cleaning, ensuring robust bonding and reducing peeling.
Implementation Method 1
a silicon-containing compound having a specific structure is used as an air interface side aligning agent... which has a low surface free energy and is likely to be surface-biased
Implementation Method 2
An optically anisotropic layer formed by aligning a liquid crystal compound in a predetermined alignment state
Implementation Method 3
a treatment (cleaning treatment) of applying a solvent to the surface of the liquid crystal layer on the side where the adjacent layer is disposed to extract a component which may hinder the adhesiveness, such as a surfactant
Data Source
AI summary
The present invention provides a liquid crystal composition which has excellent aligning properties of a liquid crystal compound and excellent adhesiveness between a liquid crystal layer after being cleaned with a solvent and a layer disposed adjacent to the liquid crystal layer, in a case of forming a liquid crystal layer. In addition, there is provided a compound which has excellent aligning properties of a liquid crystal compound and excellent adhesiveness between a liquid crystal layer after being cleaned with a solvent and a layer disposed adjacent to the liquid crystal layer, in a case of forming a liquid crystal layer by being mixed with a liquid crystal compound. In addition, there are provided an optically anisotropic layer, a cured film, and a diffraction element. The liquid crystal composition of the present invention contains a compound represented by Formula (1) and a liquid crystal compound.