Silver Ion Antimicrobial Composition with Excess Cation Ratio
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Solution Overview
Problem
Current antimicrobial compositions often fail to effectively inhibit the growth and eradication of bacteria, viruses, and other pathogens, and may cause tissue damage or lead to antibiotic resistance, while also potentially staining skin and clothes.
Innovation Solution
A composition comprising silver salt particles and free silver ions, with a mole ratio of silver ion donating salt to anion donating salt greater than 1, dissolved in water with a hydrophilic polymer, providing a high concentration of silver ions that are oligodynamic in nature, effective against a wide range of pathogens without the risks of antibiotic resistance or skin staining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional antimicrobial compositions are used to inhibit pathogen growth, then antimicrobial efficacy is improved, but tissue damage and antibiotic resistance occur
Solution Approach 1:
The patent changes the chemical parameters by using silver ions (Ag+) instead of conventional antibiotics, operating at specific concentration ranges (0.001-0.1% w/v) to achieve antimicrobial efficacy while avoiding the harmful effects of antibiotic resistance and tissue damage. The silver ion concentration is carefully controlled to maintain therapeutic effectiveness without causing toxicity.
Solution Approach 2:
The invention creates a composite antimicrobial system combining silver ion donating salts with anion donating salts in specific mole ratios (greater than 1:1), forming a complex composition that enhances antimicrobial efficacy while reducing harmful effects. This composite approach allows for synergistic effects that improve reliability without compromising safety.
2Reliability
If silver ion concentration is increased to improve antimicrobial efficacy, then pathogen eradication is enhanced, but risk of toxicity increases
Solution Approach 1:
The patent optimizes the silver ion concentration parameter within a specific range (0.001-0.1% w/v, or 0.0001-0.1 mole/liter) to achieve the therapeutic window where antimicrobial efficacy is maximized while toxicity is minimized. This precise parameter control resolves the contradiction between efficacy and safety.
Solution Approach 2:
The invention uses a mole ratio of silver ion donating salt to anion donating salt greater than 1, providing an excess of silver ions to ensure adequate antimicrobial activity while the anion donating salt modulates the overall composition to reduce toxicity. This partial excess approach maintains efficacy while managing harmful effects.
3Reliability
If silver particles are made smaller to increase surface area and efficacy, then antimicrobial activity is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies particle size parameters for silver salt particles (maximum dimension less than 5 mm, preferably 0.1 to 1.0 mm) that balance enhanced antimicrobial activity with feasible manufacturing precision. This parameter optimization allows smaller particles for better efficacy while maintaining practical manufacturing capabilities.
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 composition demonstrates significant antimicrobial efficacy against human pathogens, both in vivo and in vitro, with a high kill rate within 24 hours, while being gentle on human tissue and preventing resistance, and is suitable for various applications including wound care and medical device surface treatment.
Implementation Method 1
providing a high concentration of silver ions that are oligodynamic in nature, effective against a wide range of pathogens
Implementation Method 2
A composition comprising silver salt particles and free silver ions, with a mole ratio of silver ion donating salt to anion donating salt greater than 1, dissolved in water
Data Source
AI summary
An antimicrobial composition is provided having a mole ratio of equivalents of silver ion to equivalents of anion of greater than 1. The invention further relates to antimicrobial compositions composed of silver ions and silver salt particles. Also provided are methods for using the compositions of the invention for the treatment of a subject, and methods for conferring antimicrobial protection to an object.