Quaternary Ammonium Surface Coating Activated by Electric Field
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Solution Overview
Problem
Existing methods for decontaminating solid surfaces are inefficient, require high concentrations of antimicrobial agents, involve hazardous chemicals, and are time-consuming, failing to achieve complete microbial elimination, especially on surfaces with high microbial loads and crevices.
Innovation Solution
Applying a quaternary ammonium compound coating to a solid surface followed by an electric field with a voltage of 2-6 kV/cm and capacitance of 0.002-0.06 μF to eliminate microbes, utilizing the synergistic effect of the compound and field to achieve rapid and complete microbial kill.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional cleaning and disinfection procedures using antimicrobial agents are employed, then microbial reduction is achieved, but the effectiveness is limited and requires very high concentrations of antimicrobial agents
Solution Approach 1:
The patent changes the physical state and properties of the antimicrobial agent by applying an electric field, transforming it from a static chemical coating to an active electrochemical system. This parameter change enables the system to achieve high microbial reduction with very low concentrations of antimicrobial agents (0.01-1% w/v), resolving the contradiction between low agent concentration and high effectiveness.
Solution Approach 2:
The patent employs periodic or pulsed electric field application to activate the antimicrobial agent coating. This periodic activation allows the system to maintain high effectiveness while using minimal amounts of antimicrobial agent, as the electric field provides the necessary activation energy only when needed rather than requiring continuous high concentrations of chemical agents.
2Reliability
If very high concentrations of antimicrobial agents are used, then microbial elimination is improved, but the exposure time becomes very long especially for high microbial load surfaces
Solution Approach 1:
The patent uses periodic or pulsed electric field application to rapidly activate the antimicrobial agent, achieving complete microbial elimination in minutes rather than hours. The pulsed nature of the electric field provides intense activation energy in short bursts, dramatically reducing the exposure time required for effective decontamination while maintaining high elimination efficiency.
Solution Approach 2:
The electric field application allows the system to rush through the decontamination process by providing sufficient energy to overcome microbial resistance quickly. Instead of relying on slow diffusion and chemical action over extended periods, the electric field delivers a rapid, intense activation that achieves complete microbial kill in minutes, skipping the lengthy exposure times required by conventional methods.
3Reliability
If conventional decontamination techniques are used, then some microbial reduction is achieved, but hazardous chemicals are required
Solution Approach 1:
The patent replaces chemical-based decontamination with an electrochemical system where an electric field activates the antimicrobial agent. This substitution eliminates the need for hazardous chemicals while achieving superior microbial reduction, as the electric field provides the activation energy needed for the antimicrobial agent to function at very low concentrations, thereby removing harmful chemical exposure.
Solution Approach 2:
The patent changes the activation mechanism from purely chemical to electrochemical, using an electric field to activate the antimicrobial agent. This parameter change allows the system to achieve high microbial reduction with non-toxic, low-concentration formulations, eliminating the need for hazardous chemicals that characterize conventional decontamination methods.
4Reliability
If manual decontamination processes are used, then decontamination is achieved, but the process is error-prone
Solution Approach 1:
The patent creates a self-active system where the coated surface automatically activates its antimicrobial properties upon exposure to an electric field. This self-service mechanism eliminates manual intervention errors, as the system autonomously generates the necessary electrochemical activity to achieve complete microbial elimination, ensuring consistent and reliable decontamination without human error.
Solution Approach 2:
The patent replaces manual mechanical decontamination processes with an automated electrochemical system. The electric field activation and subsequent microbial elimination occur automatically without manual handling, thereby eliminating errors associated with manual operation while maintaining high decontamination effectiveness.
5Quantity of substance
If existing decontamination methods are applied, then some microbial load is reduced, but complete microbial elimination is not achieved especially in crevices
Solution Approach 1:
The periodic or pulsed electric field application penetrates into crevices and reaches microorganisms that conventional methods cannot access. The repeated activation cycles ensure complete elimination of microbial load including those hidden in difficult-to-reach areas, achieving total decontamination rather than partial reduction.
Solution Approach 2:
The electric field application rapidly penetrates into crevices and eliminates microorganisms in previously inaccessible areas, rushing through barriers that prevent conventional decontamination methods from achieving complete microbial elimination. This allows complete sterilization of complex surfaces with crevices and irregular geometries.
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 method achieves up to 100% microbial elimination on solid surfaces within minutes using low concentrations of quaternary ammonium compounds, effectively targeting a broad spectrum of microbes including bacteria, viruses, and fungi, while being safe and non-toxic.
Implementation Method 1
subjecting the solid surface to an electric field comprising a voltage of 2 kilovolts/cm (kV/cm) to 6 kilovolts/cm (kV/cm) and a capacitance of 0.002 microfarads (μF) to 0.06 microfarads (μF)
Implementation Method 2
wherein the solid surface comprises a coating of quaternary ammonium compound
Data Source
AI summary
The instant disclosure relates to microbial decontamination of solid surfaces. The disclosure provides method for reducing or eliminating microbes from a solid surface by employing a combination of quaternary ammonium compound coating onto the solid surface and electric field application. Particularly, the method comprises subjecting a solid surface to an electric field comprising a voltage of 2 kV/cm to 6 kV/cm and a capacitance of 0.002 μF to 0.06 μF, to reduce or eliminate the microbes from the solid surface, wherein said solid surface comprises a coating of quaternary ammonium compound. Corresponding products including kit and solid material/device are also provided. The present method has several advantages including but not limiting to high efficiency (>4 log10 or >99.99%) in reducing/eliminating microbial load on solid surfaces; requirement of very low concentrations of quaternary ammonium compound [about 0.01% (w/v) to 1% (w/v)] to achieve said high efficiency; and shorter time-periods.