Color-Changeable Plastic With Conductive Guide
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electrochromism elements face challenges in applying various substrate materials and exhibit low electrochromism speed, resulting in an extraneous appearance during color change.
Innovation Solution
A color-changeable plastic is developed, comprising a first conductive electrode, a color change layer that changes color with voltage application, a second conductive electrode layer covering the color change layer, and a conductive guide to facilitate electron movement and direct color change. The electrodes are composed of silver nanowire and polystyrene sulfonate composites, and the guide is a silver lattice with a narrow linewidth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a conventional electrochromism element structure is used, then the device can achieve color change through electrochemical reactions, but the color change speed is slow and the appearance becomes extraneous during transition
Solution Approach 1:
The electrode structure is segmented into multiple conductive electrode layers (first conductive electrode layer, second conductive electrode layer) with a conductive guide layer interspersed. This segmentation allows for more uniform electron distribution and faster electrochemical reaction across the color change layer, eliminating the slow and extraneous color transition effect.
Solution Approach 2:
A conductive guide layer is introduced as an intermediary component between the conductive electrode layers and the color change layer. This guide layer facilitates and accelerates electron movement to the color change layer, significantly improving the color change speed while maintaining uniform color transition without extraneous appearance.
2Adaptability or versatility
If conventional substrate materials are used in electrochromism elements, then the structure can be maintained, but various substrate materials including plastic cannot be effectively applied
Solution Approach 1:
The electrode structure is designed with universal applicability to work with various substrate materials including plastic, glass, and metal. The conductive electrode layers and conductive guide layer can be deposited on different substrate types through conventional coating techniques, enabling the same color-changeable plastic structure to be manufactured across multiple substrate materials without requiring fundamentally different manufacturing processes.
3Manufacturing precision
If the conductive guide layer with narrow linewidth is used, then the electron movement and color change direction can be precisely controlled, but the manufacturing precision requirements increase
Solution Approach 1:
The conductive guide layer is designed with locally optimized properties, including narrow linewidth in specific regions to control electron movement direction. The guide layer can have varying patterns (straight lines, curves, grids) in different local areas to direct color change in specific directions where needed, while maintaining easier manufacturing in other areas. This local quality approach allows precise control of color change direction without requiring high precision across the entire structure.
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 significantly improves the color change speed and allows for directional control of the color change, enhancing the commercial value and design quality by providing a quick and controlled color transformation.
Implementation Method 1
electrochromism refers to a process in which a reversible color change occurs when an electrode material undergoes oxidation or reduction reaction electrochemically
Implementation Method 2
If Li+ or H+ and electrons are discharged from an oxidation coloring material (for example, MnO or LiO), the oxidation coloring material is colored
Implementation Method 3
if Li+ or H+ and electrons are injected into WO3, which is a typical reduction coloring material, the WO3 undergoes electrochromism and is colored
Implementation Method 4
a conductive guide, disposed at at least one of the first conductive electrode layer or the second conductive electrode layer, and configured to guide a movement of electrons
Data Source
AI summary
A form of a color-changeable plastic includes: a first conductive electrode layer; a color change layer disposed on the first conductive electrode layer, configured to cover a top surface of the first conductive electrode layer, and made of a substance that changes color depending on whether a voltage is applied; a second conductive electrode layer disposed on the color change laver, configured to cover a top surface and side surfaces of the color change layer, and configured to change the color of the color change layer with the first conductive electrode layer when the voltage is applied; and a conductive guide disposed at at least one of the first conductive electrode layer or the second conductive electrode layer, and configured to guide a movement of electrons and a color change direction of the color change layer when the voltage is applied.