Liquid Crystal Composition for Printable Angle-Dependent Films
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Solution Overview
Problem
Current applications of cholesteric phase liquid crystal monomers are limited to optical films and pigments, lacking versatility and stability, especially in terms of visual angle-dependent optical effects and adaptability to various substrates.
Innovation Solution
A liquid crystal composition comprising 8%-50% polymerizable liquid crystal monomer, 1%-30% chiral reagent, 0.1%-5% photoinitiator, and 30%-70% organic solvent, which can be UV-cured into a film and printed on various substrates without pigment particles or microcapsules, exhibiting visual angle-dependent optical effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If cholesteric phase liquid crystal monomer is applied to optical films and pigments, then optical properties are improved, but application versatility is limited
Solution Approach 1:
The liquid crystal composition is formulated to serve multiple functions: it acts as both an optical material and a printable ink that can be applied to diverse substrates. The composition includes polymerizable liquid crystal monomer, chiral reagent, photoinitiator, and organic solvent, enabling it to be cured into films on various surfaces while maintaining optical activity and visual angle-dependent effects
Solution Approach 2:
The patent adjusts the composition parameters by incorporating specific ratios of liquid crystal monomer (8-50%), chiral reagent (1-30%), photoinitiator (0.1-5%), and organic solvent (30-70%). These parameter adjustments enable the material to transition from limited optical film applications to versatile printable applications while preserving optical properties
2Adaptability or versatility
If liquid crystal composition is printed onto various substrates, then adaptability is improved, but formulation complexity increases
Solution Approach 1:
The patent creates a composite liquid crystal composition by combining polymerizable liquid crystal monomer, chiral reagent, photoinitiator, and organic solvent in specific proportions. This composite formulation achieves broad substrate compatibility (glass, stainless steel, plastics, printing paper) while managing formulation complexity through systematic component selection and ratio optimization
3Illumination intensity
If pigment particles or liquid crystal microcapsules are used, then optical effects are achieved, but stability against environmental changes deteriorates
Solution Approach 1:
The patent extracts and eliminates pigment particles and liquid crystal microcapsules from the composition, replacing them with a solvent-based liquid crystal formulation. This removal of solid particles and microencapsulated structures eliminates their inherent instabilities while preserving the desired visual angle-dependent optical effects through the liquid crystal monomer system
Solution Approach 2:
The patent changes the physical state parameter of the liquid crystal material from encapsulated or particulate forms to a free liquid crystal monomer solution. This parameter change from solid/encapsulated to liquid state improves environmental stability while maintaining optical effects, as the liquid crystal molecules remain mobile and responsive without the constraints of capsules or particle structures
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 provides excellent optical properties, stability against environmental changes, and versatility for use as an ink or colorant on diverse substrates like glass, stainless steel, and plastics, with promising application prospects.
Implementation Method 1
a liquid crystal composition, comprising the following components in their respective mass percentages: 8%-50% of a polymerizable liquid crystal monomer; 1%-30% of a chiral reagent; 0.1%-5% of a photoinitiator
Implementation Method 2
a cholesteric phase liquid crystal monomer with a spiral structure is especially striking because it has excellent optical properties
Data Source
AI summary
The present disclosure discloses a liquid crystal composition. The liquid crystal composition includes the following components in their respective mass percentages: 8%-50% of a polymerizable liquid crystal monomer; 1%-30% of a chiral reagent; 0.1%-5% of a photoinitiator; and 30%-70% of an organic solvent, wherein the liquid crystal composition after being cured exhibits visual angle dependent optical effect. In this way, the liquid crystal composition of the present disclosure includes no pigment particles or liquid crystal microcapsules, can be UV cured into film, and is applicable to being printed onto various substrates through gravure or flexo printing, so that it has a promising application prospect.