Polymer-Based Antimicrobial Coatings for Simple Residual Surface Sanitization
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Solution Overview
Problem
Existing antimicrobial coatings are complex, impractical for large-scale production, and often require multiple synthetic steps, making them unsuitable for commercial use, while also failing to provide broad-spectrum antimicrobial activity and adaptability to various environments and surfaces.
Innovation Solution
A polymer-based antimicrobial composition comprising a cationic polymer, adhesion promoter, and optionally photocatalytically active particles, which forms a non-covalently bound film that effectively kills bacteria, viruses, and spores, including Clostridium difficile, and provides residual sanitization without toxic chemicals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If covalently attached or non-covalently linked antimicrobial coatings are used, then antimicrobial activity is provided, but the preparation process becomes complex and impractical for large-scale production
Solution Approach 1:
The patent extracts the complex covalent attachment and multiple synthetic steps from the coating preparation process. Instead of using covalently attached antimicrobial agents requiring complex synthesis, the invention uses a simple aqueous polymer solution that forms a film through evaporation, eliminating the need for complex chemical bonding processes while maintaining antimicrobial effectiveness.
Solution Approach 2:
The patent employs a simple, inexpensive polymer solution that can be applied directly without requiring complex preparation infrastructure. The coating material itself is a ready-to-use aqueous solution that forms the antimicrobial film through simple evaporation, making the process disposable and suitable for large-scale production without complex equipment.
2Duration of action of moving object
If leaching surfaces are used, then antimicrobial agents are released slowly, but it becomes difficult to pass EPA cytotoxicity tests
Solution Approach 1:
The patent uses a polymer that is inherently non-toxic and biocompatible, allowing the material to serve its own function as both the coating matrix and the antimicrobial delivery system. The polymer's natural properties enable it to provide sustained antimicrobial release without requiring toxic additives, thus passing EPA cytotoxicity tests while maintaining duration of action.
3Reliability
If broad-spectrum antimicrobial activity is achieved, then coverage against multiple pathogens is improved, but adaptability to different surfaces and environments becomes more difficult
Solution Approach 1:
The patent employs a universal polymer-based coating system that can be applied to multiple surface types (metal, plastic, glass, wood, textile) and provides broad-spectrum antimicrobial activity against bacteria, viruses, and fungi. The polymer matrix serves multiple functions: adhesion to diverse surfaces, delivery of antimicrobial agents, and formation of a durable film, making the system universally applicable without requiring surface-specific modifications.
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 achieves high kill rates against a broad spectrum of pathogens, including non-enveloped viruses, with a removable film that maintains antimicrobial activity for weeks, passing EPA toxicity and durability tests, and is adaptable to different surfaces.
Implementation Method 1
The polymers are cationic in nature and thus are able to interact with and kill microorganisms
Implementation Method 2
the polymers...kill microorganisms by disrupting their cell membranes
Implementation Method 3
at least one adhesion promoter, wherein the components of the composition are not covalently bound to one another
Implementation Method 4
optionally organic and/or inorganic particles that are photocatalytically active in visible light
Data Source
Figure 1~2B
AI summary
Provided is a polymer-based antimicrobial composition that is non-toxic, water soluble, and that mitigates the transmission of infectious diseases from surfaces. The composition comprises a cationic polymer, at least one adhesion promoter, optionally organic and/or inorganic particles that are photocatalytically active in visible light, and a carrier, in which the components of the composition are not covalently bound to one another. Also provided is an antimicrobial composition that comprises at least (i) a polyethylenimine-based polymer and a carrier or (ii) an organic and/or inorganic particle that is photocatalytically active in visible light, an adhesion promoter, and a carrier. The antimicrobial compositions can be applied to disinfect a surface and to form residual self-sanitizing films on the surface that are removable.