Conductive Metal Fiber Composition for Harsh Environment Stability
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Solution Overview
Problem
Conductive metal fiber-containing transparent conductive materials face challenges in maintaining conductivity under harsh conditions such as high temperature, actinic radiation, and ozone exposure, leading to deterioration in conductivity and transparency.
Innovation Solution
A conductive composition comprising conductive metal fibers with an average minor-axis length of 1 nm to 150 nm, combined with specific compounds represented by Formulas (1), (2), and (3), and a polymerizable compound that forms a matrix, which inhibits radical reactions and oxidation, thereby maintaining conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive metal fiber-containing transparent conductive materials are used, then low resistance and high optical transparency are achieved, but conductivity deteriorates under harsh conditions such as high temperature, actinic radiation, and ozone exposure
Solution Approach 1:
The patent introduces a polymer matrix as an intermediary substance that surrounds and protects the conductive metal fibers. This matrix acts as a barrier between the metal fibers and the harsh external environment (ozone, actinic radiation, high temperature), preventing direct contact and subsequent oxidation or deformation of the metal fibers, thereby maintaining conductivity stability.
Solution Approach 2:
The patent creates a composite material system consisting of conductive metal fibers embedded in a polymer matrix. This composite structure combines the electrical conductivity of metal fibers with the protective and environmental resistance properties of the polymer matrix, achieving both low resistance and stability under harsh conditions.
2Reliability
If metal nanowires are used as conductive material, then excellent balance among low resistance, durability, and cost is achieved, but oxidation occurs under harsh conditions leading to increased resistivity
Solution Approach 1:
The polymer matrix serves as a protective intermediary that prevents oxygen and ozone from directly contacting the metal nanowires. This barrier function inhibits oxidation reactions while allowing the metal nanowires to maintain their excellent conductivity and durability characteristics.
Solution Approach 2:
The polymer matrix creates a chemically inert microenvironment around the metal nanowires, isolating them from reactive species in the external environment such as oxygen and ozone. This inert protection layer prevents oxidation without requiring the metal nanowires to be inherently oxidation-resistant.
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 conductive composition effectively maintains conductivity over time even under harsh conditions, preventing oxidation of metal fibers and ensuring stability of the conductive layer.
Implementation Method 1
a polymerizable compound that forms a matrix, which inhibits radical reactions and oxidation
Implementation Method 2
a polymerizable compound that forms a matrix, which inhibits radical reactions and oxidation
Implementation Method 3
a conductive layer containing conductive fiber, such as a metal nanowire
Data Source
AI summary
The conductive composition contains at least (a) conductive metal fibers, and (b) at least one compound selected from a compound represented by the following Formula (1), a compound represented by the following Formula (2), and a compound having a partial structure represented by the following Formula (3). Each of R1 and R2 independently represents a hydrogen atom, an alkyl group, an alkenyl group, an aryl group, an acyl group, an aryloxycarbonyl group, an alkoxycarbonyl group, or a carbamoyl group. Each of R3, R4, R5, R6, R8, R9, R10, and R11 independently represents an alkyl group having 1 to 4 carbon atoms, and R7 represents a hydrogen atom or a substituent. R12 represents an alkyl group, an alkoxy group, an acyl group, or a hydrogen atom. * represents a bond.