Microbicidal Color-Changing Coatings for Touch Safety
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Solution Overview
Problem
Conventional infection control methods in aircraft and airport interiors are inadequate in preventing the spread of infectious diseases from asymptomatic individuals who can transmit pathogens through touch contact with surfaces, as these surfaces can remain contaminated for extended periods.
Innovation Solution
A self-disinfecting surface coating that changes color upon touch and after disinfection, utilizing materials with antimicrobial and tribochromatic, electrochromic, or halochromatic properties to indicate safety for touch, comprising CuO2 and silver copper ions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional infection control practices are used, then basic infection prevention is maintained, but the spread of infectious diseases from asymptomatic individuals cannot be effectively stopped
Solution Approach 1:
The surface coating performs self-disinfection automatically upon contact with microorganisms, eliminating the need for manual cleaning intervention. The antimicrobial materials in the coating continuously kill bacteria and viruses on contact, providing proactive infection prevention rather than reactive cleaning.
Solution Approach 2:
The tribochromatic material in the coating changes color when touched, providing visual feedback to users about surface contamination status. This color change mechanism enhances user confidence and encourages proper hand hygiene behavior, indirectly reducing microbial transmission.
2Loss of information
If surfaces remain clean and visible, then user confidence in safety is improved, but the ability to indicate recent contact and need for disinfection is lost
Solution Approach 1:
The coating incorporates tribochromatic materials that change color upon contact, providing immediate visual indication of surface touch and potential contamination. This color feedback mechanism helps users understand when surfaces have been contacted and may require disinfection, enhancing their confidence in surface safety.
Solution Approach 2:
The color-changing coating provides real-time feedback to users about surface contamination status. When users touch a surface, the color change immediately indicates contact has occurred, creating a feedback loop that guides user behavior and enhances confidence in infection control measures.
3Productivity
If rapid disinfection is achieved, then microbial transmission is limited, but the time required for color change indication may be insufficient
Solution Approach 1:
The coating performs self-disinfection instantly upon contact with microorganisms, eliminating the need for separate disinfection steps. The antimicrobial materials begin killing bacteria and viruses the moment contact occurs, achieving rapid disinfection without requiring additional time for manual intervention.
Solution Approach 2:
The tribochromatic material provides immediate color feedback upon contact, indicating surface touch within seconds. This rapid color change occurs simultaneously with the disinfection process, ensuring users receive immediate feedback about surface contact status without waiting for separate indication mechanisms.
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
Enhances user confidence in surface safety and limits microbial transmission by visibly indicating cleanliness through color change, ensuring rapid disinfection and safety after contact.
Implementation Method 1
The surface can include at least one of a tribochromatic material, an electrochromic material, and/or a halochromatic material
Implementation Method 2
The surface can include at least one of a tribochromatic material, an electrochromic material, and/or a halochromatic material
Implementation Method 3
The surface can include at least one of a tribochromatic material, an electrochromic material, and/or a halochromatic material
Implementation Method 4
The surface can include at least one anti-microbial and/or biostatic material
Implementation Method 5
The surface can include at least one anti-microbial and/or biostatic material
Implementation Method 6
The surface can include at least one of a tribochromatic material, an electrochromic material, and/or a halochromatic material
Data Source
AI summary
A method comprises receiving touch contact from a user on a surface and disinfecting the surface after the user breaks contact with the surface. The method includes changing color of the surface after the user breaks contact with the surface from a first color to a second color as a visible indicator that the surface has been recently touched. Further, the method includes changing the color of the surface from the second color back to the first color after disinfecting the surface as an indicator that the surface is safe to touch.