Antiviral formulation, antiviral filtering material, methods of preparation thereof and antiviral face mask
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Solution Overview
Problem
Current antiviral masks using silver and copper salts have negative health impacts, are toxic, and lose antibacterial properties upon washing, with copper salts lacking antiviral efficacy and silver having negative health effects, and there is a need for a stable, non-toxic, and effective antiviral formulation that maintains activity without leaching.
Innovation Solution
An antiviral formulation comprising unoxidized metallic copper particles with a median diameter of 200 nm or less, graphene oxide, and a bonding matrix material, such as a water-based resin or epoxy silane, which stabilizes copper and prevents leaching, while maintaining antiviral activity and breathability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silver and copper salts are used in antiviral masks, then antibacterial properties are achieved, but the formulation becomes toxic and loses effectiveness after washing
Solution Approach 1:
The patent changes the chemical form of copper from salt (toxic) to metallic nanoparticle form (non-toxic), while maintaining antiviral activity. This parameter change in oxidation state and chemical form resolves the toxicity issue while preserving reliability
Solution Approach 2:
The patent creates a composite formulation combining metallic copper particles with graphene oxide and bonding matrix materials. This composite structure prevents copper leaching during washing while maintaining antibacterial properties, resolving both reliability and toxicity concerns
2Reliability
If copper salts are used for antibacterial properties, then initial effectiveness is achieved, but the properties are lost after washing due to leaching
Solution Approach 1:
The patent applies preliminary action by pre-stabilizing copper particles through encapsulation in bonding matrix materials and chemical bonding with graphene oxide before application. This preliminary stabilization prevents leaching during subsequent washing, ensuring long-term durability of antibacterial properties
Solution Approach 2:
The patent introduces bonding matrix materials and graphene oxide as intermediary substances that anchor copper particles to the fabric substrate. These intermediaries prevent direct contact and leaching of copper into water during washing, maintaining reliability over time
3Object-affected harmful factors
If metallic copper particles are used instead of copper salts, then toxicity is reduced, but stabilization and prevention of leaching becomes more difficult
Solution Approach 1:
The patent forms a composite material system where metallic copper particles are combined with graphene oxide and bonding matrix materials. This composite structure provides the necessary stabilization and leaching prevention while maintaining the non-toxic nature of metallic copper, balancing simplicity with effectiveness
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 formulation provides stable and effective antiviral activity, prevents leaching of active components, and ensures improved filtration efficiency and breathability, making it suitable for use in face masks and other applications.
Implementation Method 1
the metallic copper particles and the graphene oxide or the reduced graphene oxide are chemically bonded
Implementation Method 2
a bonding matrix into which both metallic copper particles and graphene oxide or reduced graphene oxide are anchored
Implementation Method 3
An antiviral formulation comprising metallic copper particles in an unoxidized form... providing stable and effective antiviral activity
Data Source
AI summary
A first subject of the present invention has an antiviral formulation with metallic copper particles in an unoxidized form and having a median particle diameter inferior or equal to 200 nm, graphene oxide or reduced graphene oxide, and a bonding matrix material. A second subject of the invention has an antiviral filtering material with a layer of textile and at least one layer of an antiviral coating comprising metallic copper particles in an unoxidized form and having a median particle diameter inferior or equal to 200 nm, graphene oxide or reduced graphene oxide, and a bonding matrix into which both metallic copper particles and graphene oxide or reduced graphene oxide are anchored. The invention also concerns methods of preparation of the antiviral formulation and of the antiviral filtering material. Finally, the invention includes an antiviral face mask with a layer of textile coated with the antiviral formulation.