Sprayable Metal-Phenolic Coating for Stable Antiviral Protection
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Solution Overview
Problem
Existing antimicrobial coating methods using polyphenol-metal compounds face challenges with rapid precipitation in aqueous solutions, limiting their application to bulk or rigid substrates and requiring multiple nozzles, thus necessitating the development of a stable, single-component coating composition that can be sprayed onto various surfaces effectively.
Innovation Solution
A supramolecular sol comprising a polyphenol-based compound, such as tannic acid, and a trivalent iron salt is formulated in specific molar ratios to form a stable, one-component coating composition that can be sprayed through a single nozzle, forming a continuous metal-phenolic network on substrates without precipitation, thereby providing broad-spectrum antibacterial and antiviral protection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyphenol-based compound and trivalent iron salt are mixed in aqueous solution, then antibacterial and antiviral effects are achieved, but rapid precipitation occurs limiting stability and sprayability
Solution Approach 1:
The patent changes the physical state parameter of the polyphenol-based compound and trivalent iron salt from dissolved aqueous solution to suspended particles, which prevents rapid precipitation while maintaining antibacterial and antiviral effectiveness. The particles remain dispersed in the liquid carrier without forming precipitates, solving the stability issue.
Solution Approach 2:
The patent creates a composite coating composition combining polyphenol-based compounds, trivalent iron salts, and a liquid carrier in a particulate suspension system. This composite structure allows the active ingredients to remain stable in liquid form while maintaining their microbicidal properties, enabling both stability and effectiveness.
2Ease of manufacture
If dip-coating method is used for polyphenol-metal compounds, then coating can be applied, but it is difficult to coat bulk or rigid substrates and requires immersion
Solution Approach 1:
The patent transforms the coating application method from liquid dip-coating to aerosol spray delivery. The particulate suspension is converted into an aerosol that can be sprayed onto various substrates including bulk and rigid objects, eliminating the need for immersion and expanding substrate accessibility.
Solution Approach 2:
The patent transitions the coating composition from a liquid state suitable for dip-coating to a particulate aerosol suspension that can be delivered in a sprayable form. This dimensional change in delivery method allows coating of complex geometries and rigid substrates that cannot be immersed.
3Ease of operation
If two physically separated coating compositions are used to prevent precipitation, then sprayability is improved, but device complexity and operation convenience are reduced
Solution Approach 1:
The patent merges polyphenol-based compounds and trivalent iron salts into a single particulate suspension system rather than keeping them physically separated. This unified formulation allows both ingredients to coexist stably in one composition delivered through a single nozzle, simplifying the device and operation.
Solution Approach 2:
The patent introduces a liquid carrier as an intermediary medium that suspends both polyphenol-based compounds and trivalent iron salts as particles. This intermediary allows the incompatible ingredients to coexist in a single sprayable composition without precipitating, eliminating the need for multiple nozzles.
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 composition effectively inactivates a wide range of pathogens, including bacteria and viruses, on various substrates, demonstrating durability and convenience, suitable for facilities like greenhouses and livestock barns, with long-term stability and broad applicability.
Implementation Method 1
Polyphenol-metal compounds prepared by bonding polyvalent metal ions and polyphenols such as tannic acid through coordination bonding
Implementation Method 2
a supramolecular sol comprising a polyphenol-based compound and a trivalent iron salt
Data Source
AI summary
Proposed is a one-component antibacterial and antiviral coating composition capable of killing various pathogenic microorganisms or preventing infection caused thereby. The coating composition can be sprayed onto a substrate, regardless of the physical properties of the substrate, to achieve a microbicidal effect that inactivates various pathogenic microorganisms. In addition, a coating method disclosed herein is excellent in terms of convenience and economic feasibility, and thus can be widely applied to disinfection and disease-preventive methods for various facilities such as greenhouses, livestock barns, and poultry farms, as well as household goods.