Self-sterilizing fabrics incorporating anti-viral cold-active proteases
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Solution Overview
Problem
Current personal protective equipment (PPE) such as face masks are ineffective in inactivating aerosolized pathogenic microbes, including enveloped viruses like Coronavirus and Gram-negative bacteria, due to their fomite nature and reliance on metal-based antimicrobial additives that are uncomfortable, expensive, and unsustainable.
Innovation Solution
Incorporation of psychrophilic and cold-active enzymes, specifically trypsin enzymes derived from deep-sea cod and crabs, into fabric materials to create self-sterilizing PPE that inactivates pathogens upon contact with aerosolized viruses and bacteria.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal-based antimicrobial additives (silver, copper, zinc) are incorporated into PPE fabrics, then antimicrobial activity is improved, but comfort, cost, and sustainability deteriorate
Solution Approach 1:
The patent changes the fundamental parameter of the antimicrobial agent from metal ions to enzyme catalysts. Psychrophilic proteases are incorporated into the fabric, which remain inactive in dry conditions but become activated upon contact with moisture from pathogens, providing antimicrobial activity without requiring metal additives that compromise comfort and sustainability
Solution Approach 2:
The patent substitutes the physical/chemical mechanism of metal ion release with an enzymatic catalytic mechanism. Instead of relying on metal ions to disrupt microbial cell membranes, the system uses proteases to degrade pathogen proteins, achieving the same protective function through a different scientific principle that avoids the drawbacks of metal-based solutions
2Reliability
If metal-based antimicrobial additives are used, then antimicrobial activity is improved, but cost and environmental sustainability worsen
Solution Approach 1:
The patent replaces metal-based antimicrobial mechanisms with enzymatic catalysis. Psychrophilic proteases degrade pathogen proteins through catalytic action, and the enzymes remain stable in the fabric without leaching into the environment, providing a sustainable alternative to metal ions that accumulate as waste
Solution Approach 2:
The patent employs enzymes that can be incorporated into disposable PPE at low cost. The enzymes provide their antimicrobial function during the brief period the mask is worn, then the entire mask including the enzyme layer is disposed of, eliminating the need for expensive, environmentally persistent metal additives
3Reliability
If pore size of disposable facemasks is reduced to remove smaller virus-containing droplets, then viral filtration is improved, but breathing ability deteriorates
Solution Approach 1:
The patent implements continuous viral inactivation throughout the fabric structure by incorporating enzymes throughout the mask layers. As long as moisture from pathogens is present, the proteases continuously degrade viral proteins, providing ongoing protection without requiring the wearer to remove or adjust the mask for breathing
Solution Approach 2:
The patent introduces moisture-activated enzymatic action as an intermediary mechanism between the fabric and pathogens. Rather than relying solely on physical filtration that blocks breath, the enzymes act as a chemical mediator that inactivates viruses in the moisture layer, allowing larger pores that maintain breathing comfort while achieving viral protection
4Ease of operation
If masks are frequently touched, adjusted, removed, and refitted due to discomfort, then breathing comfort is improved, but contamination risk worsens
Solution Approach 1:
The patent converts the harmful moisture that accumulates on masks during wear into a beneficial trigger for enzymatic activation. The very moisture that causes discomfort and frequent adjustment now activates the proteases to inactivate pathogens, transforming the condition that leads to contamination risk into the mechanism that prevents it
Solution Approach 2:
The mask performs self-sterilization through its incorporated enzymes. When pathogens contact the moistened fabric, the psychrophilic proteases automatically activate and degrade the pathogens without requiring user intervention, making the mask self-protecting against the contamination that would otherwise result from frequent handling
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 enzyme-treated fabrics effectively inactivate enveloped viruses and Gram-negative bacteria, reducing the risk of nosocomial infections and providing a sustainable, comfortable, and cost-effective solution for PPE, while being biodegradable and environmentally friendly.
Implementation Method 1
Incorporation of psychrophilic and cold-active enzymes, specifically trypsin enzymes derived from deep-sea cod and crabs, into fabric materials to create self-sterilizing PPE that inactivates pathogens upon contact with aerosolized viruses and bacteria
Implementation Method 2
The enzyme-treated fabrics effectively inactivate enveloped viruses and Gram-negative bacteria
Data Source
AI summary
The invention provides fabrics that incorporate protease enzymes that inactivate viruses and bacteria. The fabrics of the invention may be used in the production of various items of self-sterilizing protective equipment including protective facemasks.