Nonionic Silver Nanoparticles for Microbial Resistance
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Solution Overview
Problem
Current antimicrobial compositions, including traditional silver nanoparticles, face challenges such as microbial resistance and toxicity issues, particularly in the food provision chain, where bacteria and fungi can contaminate animals and equipment, leading to significant losses and health concerns.
Innovation Solution
Nonionic silver nanoparticles formed by laser ablation, with specific particle sizes and shapes, are used to target and kill bacteria, fungi, and viruses without releasing silver ions, thereby avoiding resistance and toxicity, and are applied across the food provision chain from animal living areas to food products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional silver nanoparticles are used for disinfection, then antimicrobial activity is achieved, but microbial resistance develops over time
Solution Approach 1:
The patent modifies the surface charge parameter of silver nanoparticles by coating them with polyelectrolytes to create a zwitterionic surface. This parameter change prevents microbial resistance while maintaining antimicrobial activity, as the zwitterionic surface interacts with microbes through multiple mechanisms rather than a single mode of action that microbes can adapt to.
Solution Approach 2:
The patent creates composite nanoparticles by combining silver core with polyelectrolyte coatings. This composite structure integrates the antimicrobial properties of silver with the resistance-preventing properties of zwitterionic polymers, achieving both effective disinfection and sustained effectiveness against resistant strains.
2Reliability
If antibiotics are used to control microbes, then microbial growth is inhibited, but toxicity to humans and animals increases
Solution Approach 1:
The patent changes the concentration parameter of silver in the nanoparticle formulation, using controlled low concentrations that are effective against microbes but non-toxic to humans and animals. The zwitterionic coating further modulates this by controlling silver ion release rates, maintaining therapeutic effectiveness while eliminating toxicity.
3Reliability
If silver nanoparticles are used for disinfection, then bacterial contamination is reduced, but silver ion release causes toxicity
Solution Approach 1:
The patent extracts or removes the harmful silver ion release mechanism from the nanoparticle system by implementing a zwitterionic coating that prevents silver ion dissolution. This allows the nanoparticle to maintain antimicrobial activity through alternative mechanisms while eliminating the toxic silver ion release pathway.
Solution Approach 2:
The zwitterionic polyelectrolyte coating acts as an intermediary layer between the silver core and the external environment. This mediator prevents direct interaction between silver ions and biological systems, blocking toxicity while allowing controlled antimicrobial activity through the coating-microbe interaction.
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
These nanoparticles effectively disinfect animals, equipment, and food products without inducing microbial resistance, maintaining antimicrobial activity over time and being non-toxic to humans and animals, even at low concentrations, thus addressing the limitations of traditional antimicrobial agents.
Implementation Method 1
Nonionic silver nanoparticles formed by laser ablation
Data Source
AI summary
Disclosed are embodiments of nanoparticle compositions, methods and systems for disinfecting animals and food products along the whole food provision chain. In one embodiment, a composition includes nonionic metal nanoparticles. The composition may be a spray, an oil, a solution or other appropriate composition for ingestion or application to food products. The silver nanoparticles maintain a stead MIC and do not exhibit microbial resistance as do conventional colloidal silver and silver nanoparticles made by chemical synthesis.