Structural color system based on supercritical microemulsion phase separation, preparation method therefor and use thereof
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Solution Overview
Problem
Existing methods for generating structural colors in textiles using chemical dyes result in environmental pollution and waste, while supercritical fluid technology for microemulsion formation has not been applied for this purpose.
Innovation Solution
A method involving supercritical microemulsion phase separation using amphiphilic emulsifiers, water, and cosolvents in a supercritical fluid system to generate structural colors and patterns, controlled by temperature and pressure adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If chemical dyes are used for coloration, then coloration effect is achieved, but environmental pollution and chemical residues occur
Solution Approach 1:
The patent changes the fundamental parameter of the coloration mechanism from chemical absorption (dyes) to physical structural coloration through microemulsion phase separation. By controlling temperature and pressure parameters during supercritical fluid processing, structural colors are generated without chemical dyes, eliminating environmental pollution while achieving coloration effect
Solution Approach 2:
The patent replaces the chemical system (dyes and chromophores) with a physical system (supercritical microemulsion phase separation). The mechanical/physical process of phase separation under controlled temperature and pressure generates structural colors, substituting chemical coloration methods with a cleaner physical approach
2Object-generated harmful factors
If supercritical fluid technology is used, then environmental friendliness is improved, but application for structural color generation has not been realized
Solution Approach 1:
The patent performs preliminary action by first forming microemulsions in the supercritical fluid system before inducing phase separation. This preliminary microemulsion formation step prepares the system for subsequent structural color generation, enabling the supercritical fluid technology to be successfully applied for the first time in structural coloration
Solution Approach 2:
The patent utilizes phase transitions of the supercritical microemulsion system by controlling temperature and pressure to induce phase separation. This phase transition mechanism enables the generation of structural colors while maintaining the environmental benefits of supercritical fluid technology, expanding its application scope to include structural coloration
3Ease of manufacture
If microemulsion phase separation is controlled, then structural colors and patterns are generated, but process complexity increases
Solution Approach 1:
The patent controls microemulsion phase separation by adjusting key parameters (temperature and pressure) of the supercritical fluid system. By changing these parameters, the phase separation process is controlled to generate desired structural colors and patterns, achieving color generation while managing process complexity through parameter optimization
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 method produces flexible, environmentally friendly structural colors and patterns without chemical residues, suitable for coloration materials and light-shielding devices, and can be applied in flexible wearables.
Implementation Method 1
controlling the temperature and pressure of the supercritical fluid system to cause phase separation of the microemulsion, thereby obtaining a structural color system
Implementation Method 2
supercritical fluid, especially supercritical carbon dioxide (SCF-CO2) fluid, uses critical-state media such as CO2 instead of water as the processing medium
Implementation Method 3
the method of forming microemulsions in supercritical fluid can overcome the limitations such as the inherent hydrophobicity of the fluid itself
Implementation Method 4
preparing a working solution using an amphiphilic emulsifier, water, and a cosolvent as raw materials
Data Source
AI summary
A working solution is prepared using an amphiphilic emulsifier, water, and a cosolvent as raw materials, so that a microemulsion with specific components is first formed in a supercritical fluid. Then, the system conditions are gradually changed to perform phase separation, thereby obtaining the structural color system. Patterns of different shapes can be further obtained by controlling different pressure and temperature conditions. In the present invention, structural colors are generated based on supercritical microemulsion phase separation, realizing non-pigment coloration of a solution system. In addition, patterns of different shapes can be obtained by controlling process conditions, so the present invention has good application markets and prospects in fields such as related display or light-shielding devices and other coloration applications. The structural color system obtained in the present invention has flexible characteristics and can be used in the field of flexible wearables.