Colloidal Silver and Titanium Dioxide Sterilizing Composition
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing products with sterilizing activity against coronaviruses and influenza viruses often rely on synthetic or natural organic materials, which may have insufficient performance under low-intensity radiation, and complex synthesis methods are used for silver and titanium dioxide combinations, lacking simplicity and stability.
Innovation Solution
A composition combining colloidal silver and titanium dioxide nanoparticles, stabilized with a binder, is synthesized using a straightforward method, ensuring homogeneous dispersion and maintaining antibacterial, antifungal, and antiviral activity regardless of light presence, with a formulation of 11-15 wt% silver, 18-25 wt% titanium dioxide, 0.01-10 wt% dispersion stabilizer, and 0.1-4 wt% binder in water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing sterilizing products use synthetic or natural organic materials, then they can provide sterilizing activity, but their performance is insufficient under low-intensity radiation conditions
Solution Approach 1:
The patent combines colloidal silver particles (1-100 nm) with titanium dioxide nanoparticles (1-100 nm) to create a composite material that maintains sterilizing activity under both high and low-intensity radiation conditions. The titanium dioxide component provides photocatalytic activity under low-intensity light, while the silver component ensures broad-spectrum antimicrobial coverage, resolving the contradiction between reliability and adaptability to different radiation conditions.
2Stability of the object's composition
If complex synthesis methods are used for silver and titanium dioxide combinations, then homogeneous dispersion can be achieved, but the manufacturing process becomes complex and stability is compromised
Solution Approach 1:
The patent prepares colloidal silver particles and titanium dioxide nanoparticles separately with predetermined size distributions (1-100 nm) before combining them. This preliminary preparation ensures that when the components are mixed, they achieve homogeneous dispersion without requiring complex synthesis procedures, thus maintaining stability while simplifying the manufacturing process.
3Reliability
If silver colloid is used at high concentration, then antibacterial activity is enhanced, but the risk of toxicity increases
Solution Approach 1:
The patent optimizes the concentration and size parameters of colloidal silver particles (1-100 nm) to achieve maximum antibacterial activity at lower concentrations. By controlling the particle size distribution and concentration, the patent enhances杀菌 efficacy while reducing the risk of toxicity, resolving the contradiction between reliability and harmful effects.
4Reliability
If titanium dioxide is used as photocatalyst, then degradation of stinking materials is achieved, but the material requires specific energy input to activate
Solution Approach 1:
The patent combines titanium dioxide photocatalyst with colloidal silver to create a system that functions both as a photocatalyst for degrading organic odors and as an antimicrobial agent. The titanium dioxide component activates under light exposure to degrade stinking materials, while the silver component provides contact-based antimicrobial activity, making the composition universally effective against both odors and microorganisms without requiring continuous high energy input.
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 achieves a 99.9% killing rate against a broad spectrum of viruses, bacteria, and fungi, including SARS coronavirus, avian influenza, and human influenza, while maintaining adhesion and deodorization capabilities, and effectively decomposing formaldehyde and ammonia, with long-lasting antibacterial activity.
Implementation Method 1
silver colloid, that is, silver clusters (10 to 150 nm in size) evenly dispersed throughout an aqueous solvent, are found to have potently sterilizing activity against approximately 650 species of harmful bacteria and fungi
Implementation Method 2
When exposed to light of the proper energy, a photocatalyst shows electrically semiconductive properties, generating active oxygen species or hydroxyl (OH) radicals which induce strong redox reactions responsible for antibacterial activity
Implementation Method 3
generating active oxygen species or hydroxyl (OH) radicals which induce strong redox reactions responsible for antibacterial activity
Implementation Method 4
A certain level of energy causes electrons in a semiconductor to be excited from the valence band to the conduction band. While electrons (e−) are excited to the conduction band, holes (h+) are created in the valance band
Implementation Method 5
These electrons and holes perform various reactions including the degradation of harmful materials by means of potent oxidation or reduction
Implementation Method 6
the hydroxyl radical is able to oxidize most materials whereby it is effectively used to purify NOx, volatile organic compounds (VOCs) and various stingy odors, to remove BOD, chromacity, degradation-refractory contaminants and environmental hormones
Data Source
AI summary
Disclosed herein are an anti-bacterial, anti-fungal and anti-viral composition with excellent sterilizing power, deodorization and adhesion activity, an application thereof, and a method for preparing the same. The composition with sterilizing activity against bacteria, fungus and virus comprises colloidal silver particles in an amount of from 11 wt % to 15 wt %, titanium dioxide nanoparticles in an amount of from 18 wt % to 25 wt %, a dispersion stabilizer in an amount of from 0.01 wt % to 10 wt %, a binder in an amount of from 0.1 wt % to 4 wt %, and a balance of water in an amount required to form 100 wt %.