Hypochlorous Acid Nanoparticle Encapsulation for Persistent Surface Protection
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Solution Overview
Problem
Current methods for preventing microbial contamination on surfaces either use harmful chemicals that require rinsing or provide no persistent protection against microbes, posing risks to human health and efficacy.
Innovation Solution
Aqueous solutions of hypochlorous acid encapsulated in nanoparticles for controlled release, providing persistent antimicrobial protection without human toxicity, using a process that avoids air exposure and controls pH to stabilize the acid.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oxidizing agents like sodium hypochlorite are used to kill microbes, then antimicrobial effectiveness is improved, but human toxicity increases
Solution Approach 1:
The patent uses nanoparticles as an intermediary carrier that releases hypochlorous acid gradually. The nanoparticle matrix acts as a mediator between the antimicrobial agent and the target surface, controlling release rate to maintain effectiveness while reducing acute toxicity. The controlled release mechanism allows the hypochlorous acid to be delivered at concentrations effective against microbes but below harmful levels for human tissue.
Solution Approach 2:
The patent changes the concentration parameter of hypochlorous acid over time through controlled release. By adjusting the release rate from the nanoparticle, the system maintains low initial concentrations that are safe for human contact while progressively increasing to effective antimicrobial levels, thus resolving the contradiction between effectiveness and toxicity.
2Productivity
If harsh detergents are used to clean surfaces, then cleaning effectiveness is improved, but human safety deteriorates
Solution Approach 1:
The nanoparticle composition provides continuous, prolonged release of hypochlorous acid on the surface. This continuous action maintains cleaning effectiveness over extended periods without requiring repeated application of harsh detergents, thereby improving productivity while ensuring ongoing human safety.
Solution Approach 2:
The nanoparticle carrier is designed to degrade or be replaced after delivering its antimicrobial payload. This disposable approach allows the use of a safe, biodegradable carrier that performs its function and then disappears, eliminating the need for persistent chemical residues that would harm human safety while maintaining cleaning effectiveness during its service life.
3Reliability
If autoclaving is used to sterilize objects, then microbial elimination is improved, but persistent protection deteriorates
Solution Approach 1:
The nanoparticle composition is applied to the surface before the object is put into service. The controlled release of hypochlorous acid from the nanoparticle provides immediate and sustained antimicrobial protection, acting in advance to prevent contamination rather than merely eliminating existing microbes, thus extending the duration of protective action.
Solution Approach 2:
The nanoparticle serves as a long-lasting intermediary that deposits antimicrobial agents onto the surface. This intermediary layer provides persistent protection by continuously releasing hypochlorous acid, bridging the gap between initial sterilization and ongoing microbial prevention, thereby extending the duration of protective action.
4Reliability
If surfaces are treated with bleach, then antimicrobial activity is improved, but safety for human contact deteriorates
Solution Approach 1:
The nanoparticle acts as a protective intermediary layer between the hypochlorous acid and human skin. It controls the release rate to ensure that sufficient antimicrobial activity is maintained while the controlled delivery prevents direct contact between high concentrations of the acid and human tissue, thus improving safety for human contact.
Solution Approach 2:
The patent replaces the need for mechanical rinsing operations with a chemical controlled release system. Instead of applying bleach and then mechanically removing it through rinsing, the nanoparticle system provides sustained release at safe concentrations, eliminating the need for subsequent safety rinsing steps while maintaining antimicrobial activity.
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 solution offers prolonged antimicrobial activity on treated surfaces, maintaining effectiveness over time while being safe for human contact, applicable in various environments.
Implementation Method 1
Compositions of the invention release hypochlorous acid gradually over time
Implementation Method 2
The aqueous solution may have a pH from about 4.5 to about 7.5. The aqueous solution may include a buffering agent
Data Source
AI summary
Provided are anti-microbial compositions that include an aqueous solution of hypochlorous acid encapsulated in a nanoparticle that allows for controlled release of hypochlorous acid. Also provided are methods of making and using such compositions.