Copper Iodide Antimicrobial Compositions for Microbial Control
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Solution Overview
Problem
Current antimicrobial technologies, particularly those using silver-based particles, are less effective against a broad range of microbes compared to copper-based solutions, and there is a need for antimicrobial agents that provide long-term efficacy without toxicity and color alteration in applications like medical and marine environments.
Innovation Solution
Development of antimicrobial compositions comprising surface-functionalized low water solubility copper salts, specifically copper iodide (CuI), which release copper cations predictably and effectively target aerobic and anaerobic microbes, viruses, molds, and fungi, while maintaining stability and color neutrality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If silver-based particles are used for antimicrobial activity, then antimicrobial effect is achieved, but efficacy against broad range of microbes is limited
Solution Approach 1:
The patent changes the chemical parameter from silver-based to copper-based particles, specifically using copper iodide and other copper salts. This parameter change results in enhanced broad-spectrum antimicrobial activity against bacteria, viruses, molds, and fungi while maintaining stability and color neutrality in various applications.
2Productivity
If copper salts with high water solubility are used, then ion release is rapid, but stability and color neutrality are compromised
Solution Approach 1:
The patent selects copper salts with specific solubility parameters (copper iodide, copper chloride, copper sulfate) that provide optimal balance between ion release rate and formulation stability. The functionalization with polymers and surfactants further modulates the release kinetics while maintaining stability.
Solution Approach 2:
The patent introduces functionalizing agents including polymers (PVP, PEG, chitosan) and surfactants as intermediaries between the copper salt particles and the aqueous environment. These intermediaries control the dissolution rate, stabilize the particles, prevent aggregation, and maintain color neutrality while enabling sustained ion release.
3Stability of the object's composition
If particles are surface functionalized to stabilize them, then dispersion and stability improve, but particle complexity increases
Solution Approach 1:
The patent uses functionalizing agents (polymers, surfactants) as intermediary layers on the particle surface. These intermediaries provide steric and electrostatic stabilization, improve dispersion in aqueous media, and control ion release kinetics without requiring complex multi-layer structures.
Solution Approach 2:
The patent creates composite particles combining copper salt cores with functional polymer or surfactant shells. This composite structure integrates the antimicrobial properties of copper with the stabilizing and dispersing properties of the organic functionalization layer, achieving both stability and simplicity.
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 copper iodide-based compositions demonstrate enhanced broad-spectrum antimicrobial activity, providing long-term efficacy and stability, reducing microbial growth on surfaces without altering their appearance, making them suitable for medical and marine applications.
Implementation Method 1
particles of copper salts including the copper halide and specifically copper iodide ("CuI"), when formulated in accordance with the teachings herein, is surprisingly effective as a broad-spectrum, fast-acting antimicrobial agent
Implementation Method 2
The oligodynamic effect is demonstrated by other metals, specifically gold, silver, copper, zinc, and bismuth
Implementation Method 3
at least one functionalizing agent in contact with the particle, the functionalizing agent stabilizing the particles in a carrier such that an antimicrobially effective amount of ions is released
Data Source
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AI summary
Compositions having antimicrobial activity contain surface functionalized particles comprising an inorganic copper salt which has low water solubility. These types of inorganic salts may also be introduced in porous particles to yield antimicrobial compositions. The compositions may optionally comprise additional antimicrobial agents, salts with high water solubility, organic acids, salts of organic acids and their esters. The compositions may be added to various fluids used in the petroleum extraction industry, or used as coatings on components used in this industry. These antimicrobial, materials may be used for reducing both anaerobic and aerobic bacteria and are also useful for reducing corrosion of ferrous components caused by anaerobic bacteria. Although such compositions may be used for any antimicrobial application, and some of the other important uses of these compositions are in wound care, personal care and waste processing,.