Self-Spreading Biocide via Silicone Spreading
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Solution Overview
Problem
Current decontamination methods are inefficient for inaccessible surfaces and require unstable chemical agents, often leading to incomplete disinfection and safety concerns, with existing self-disinfecting technologies being difficult to apply and lacking mobility.
Innovation Solution
Development of a highly-mobile, self-spreading biocide system combining polydimethylsiloxane (PDMS) with quaternary ammonium salts or phenol biocidal moieties, allowing for facile application and effective coverage of surfaces, including those hard to reach, by leveraging the spreading properties of silicone fluids and antimicrobial properties of these compounds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional decontaminating agents are used, then decontamination can be achieved, but the agents are unstable and require activation just prior to use, losing effectiveness within hours
Solution Approach 1:
The biocidal agent is pre-applied to surfaces during manufacturing or installation, allowing it to be present and active before contamination occurs. This eliminates the need for activation just prior to use and prevents degradation over time, as the agent is already in its effective form on the surface.
Solution Approach 2:
The self-spreading biocidal composition automatically activates and distributes itself upon contact with contaminated surfaces, requiring no external activation or reapplication. The composition self-regulates its distribution and maintains effectiveness continuously, eliminating the need for periodic reactivation.
2Reliability
If decontaminating agents are transported to contaminated areas, then decontamination can be performed, but tons of agents and solvents must be transported, making the process complex and resource-intensive
Solution Approach 1:
The biocidal composition is applied to surfaces during manufacturing or installation, eliminating the need for subsequent transportation and application of large quantities of agents. The surface itself becomes the decontamination device, requiring no complex logistics for agent delivery.
Solution Approach 2:
The treated surface automatically neutralizes contaminants upon contact, requiring no external decontamination equipment, personnel, or logistics. The surface performs self-decontamination, eliminating the need for transporting agents to contaminated areas.
3Ease of operation
If moisture is used for distribution of biocides, then distribution can be achieved, but efficacy is rapidly attenuated by organic matter and moisture alone results in mold and bacteria growth
Solution Approach 1:
The biocidal composition combines hydrophilic biocidal agents with hydrophobic silicone-based carriers, creating a composite material that leverages the water-attracting properties for distribution while the hydrophobic matrix prevents excessive moisture retention that would promote mold and bacterial growth.
Solution Approach 2:
The composition provides different functional properties in different phases: the hydrophilic components facilitate distribution and contact with contaminants, while the hydrophobic silicone base prevents water accumulation and mold growth, creating localized functional zones within the same material.
4Area of stationary object
If self-spreading biocidal compositions are applied to surfaces, then effective coverage including inaccessible surfaces can be achieved, but the composition must maintain stability and effectiveness over long periods
Solution Approach 1:
The silicone-based composite material provides both the self-spreading capability needed for extensive surface coverage and the chemical stability required for long-term effectiveness. The hydrophobic silicone matrix protects the biocidal agents from degradation while allowing controlled distribution across surfaces.
Solution Approach 2:
Instead of using volatile or unstable agents that require frequent reapplication, the invention uses stable, non-volatile silicone-based compositions that remain effective indefinitely once applied, inverting the traditional approach where stability compromises spreading ability.
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 biocide system effectively neutralizes pathogens on contact, providing long-term self-disinfection capabilities with minimal application, suitable for various surfaces and environments, including air ducts and electronic apparatus, while maintaining antimicrobial activity against both Gram-positive and Gram-negative bacteria.
Implementation Method 1
The biocidal composition is capable of self-spreading upon application to a surface
Implementation Method 2
leveraging the spreading properties of silicone fluids
Implementation Method 3
The compounds neutralize pathogens on contact and exhibit long term self-disinfection capabilities... maintaining antimicrobial activity against both Gram-positive and Gram-negative bacteria
Data Source
AI summary
A compound having the formula:Each R1 is C1-C3 alkyl group or fluoridated C1-C3 alkyl group. The value n is a positive integer. Each R2 is alkylene group or polyethylene glycol group. Y1 is hydrogen, quaternary ammonium containing group, or phenol-containing group. Y2 is quaternary ammonium-containing group or phenol-containing group. The quaternary ammonium-containing group is non-aromatic and contains no more than one quaternary ammonium.