Antimicrobial Window Coating via Silver Diffusion
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Solution Overview
Problem
Conventional windows lack effective anti-fungal, anti-bacterial, and self-cleaning properties, and are not scratch resistant, which increases the risk of germ transmission and maintenance.
Innovation Solution
A window coating system comprising a silver layer under a porous zirconium oxide layer, which allows silver particles to migrate to the surface over time to kill bacteria and fungus, combined with a photocatalytic titanium dioxide layer for self-cleaning and enhanced durability, and optionally includes a carbon-based layer for energy transformation during heat treatment to improve scratch resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional window coating is applied, then the window provides basic protection, but it lacks anti-fungal, anti-bacterial, and self-cleaning properties
Solution Approach 1:
The coating is divided into multiple functional layers: a base coating layer providing structural support, a silver-containing layer for anti-bacterial and anti-fungal properties, and a porous overlay allowing silver migration. This segmentation enables each layer to perform its specific function while collectively providing comprehensive protection.
Solution Approach 2:
The coating combines multiple materials with different properties: silver particles for antimicrobial activity, porous material for controlled migration, and polymer matrix for structural integrity. This composite structure integrates diverse functionalities into a single coating system that provides both protection and self-cleaning capabilities.
2Strength
If the coating is made more durable and scratch resistant, then the window becomes more robust, but the manufacturing process becomes more complex
Solution Approach 1:
The silver-containing layer and porous overlay are applied to the window coating before final installation. This preliminary application ensures that the antimicrobial and self-cleaning properties are built into the coating structure during manufacturing, rather than requiring post-installation treatment or complex assembly steps.
Solution Approach 2:
The porous overlay enables silver particles to automatically migrate to the coating surface over time, providing continuous self-replenishment of antimicrobial agents without external intervention. This self-service mechanism maintains effectiveness without requiring manual reapplication or complex control systems.
3Reliability
If silver particles are prevented from migrating to the surface, then the coating remains stable, but the anti-bacterial and anti-fungal effectiveness is reduced
Solution Approach 1:
The overlay is designed with a porous structure that allows controlled migration of silver particles from the silver-containing layer to the coating surface. The porosity enables silver movement when needed for antimicrobial activity while maintaining overall coating integrity and stability through the polymer matrix 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 coating system provides effective anti-fungal and anti-bacterial properties, self-cleaning capabilities, and increased scratch resistance, reducing germ transmission and maintenance needs while maintaining transparency and aesthetic appeal.
Implementation Method 1
The layer(s) over the silver are specially designed so as to be porous thereby permitting silver particles to migrate or diffuse therethrough to the surface of the window over long periods of time
Implementation Method 2
permitting silver particles to migrate or diffuse therethrough to the surface of the window over long periods of time
Implementation Method 3
Photocatalytic coatings are also known as self-cleaning coatings, where the coating reacts with and decomposes organic compounds or pollutants into inorganic non-harmful compounds such as CO 2 and/or H 2 O
Data Source
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AI summary
Certain example embodiments of this invention relate to a window having anti-fungal/anti-bacterial properties and self-cleaning properties, and a method of making the same. In certain example embodiments, a silver based layer is be provide and the layer(s) located thereover (e.g., the zirconium oxide inclusive layer) are designed to permit silver particles to migrate/diffuse to the surface over time to kill bacteria/germs at the surface of the coated article thereby creating an anti-bacterial/anti-fungal effect. In certain example embodiments, silver may also or instead be mixed in with other material as the top layer of the anti-bacterial coating.