Antibacterial Liquid Siloxane Binder Stability
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Solution Overview
Problem
Antibacterial liquids used in existing technologies suffer from sedimentation issues leading to caking over time and degradation of antibacterial properties when exposed to weak alkali environments, resulting in unstable films with compromised antibacterial efficacy.
Innovation Solution
An antibacterial liquid formulation with a concentration of solid contents less than 5% by mass and a siloxane bond content of 60% or more, containing silver-supporting inorganic oxide microparticles, a binder with siloxane bonds, and a solvent mixture of alcohol and water, which prevents sedimentation and maintains antibacterial properties by reducing voids in the film structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the concentration of solid components in the antibacterial liquid is increased to enhance antibacterial efficacy, then the antibacterial effect is improved, but the solid components sediment and cake over time, reducing temporal stability
Solution Approach 1:
The invention optimizes the concentration of solid components to less than 5% by mass and adjusts the siloxane bond content to 60% or more by mass relative to total solid content. These parameter changes prevent sedimentation and caking while maintaining effective antibacterial activity, resolving the contradiction between efficacy and stability.
Solution Approach 2:
The invention uses a composite binder system comprising siloxane bond-containing compounds (such as silane-modified polyurethanes or epoxy resins with siloxane groups) combined with antibacterial microparticles. This composite structure ensures uniform dispersion of solid components, prevents caking, and maintains both temporal stability and antibacterial efficacy.
2Reliability
If the antibacterial film is exposed to weak alkali environments, then the film performs its antibacterial function, but the siloxane bonds break, causing structural degradation and loss of antibacterial properties
Solution Approach 1:
The invention modifies the siloxane bond structure by incorporating it into more chemically resistant polymer matrices such as silane-modified polyurethanes or epoxy resins. This structural modification reduces the reactivity of siloxane bonds with OH− ions, preventing hydrolysis and maintaining both structural integrity and antibacterial function in alkali environments.
Solution Approach 2:
The invention introduces protective polymer groups (such as polyurethane or epoxy resin chains) that act as intermediaries between the siloxane bonds and the alkali environment. These polymer chains shield the siloxane bonds from direct contact with OH− ions, preventing bond breaking while allowing the antibacterial microparticles to remain functional.
3Shape
If the siloxane network structure is used to support antibacterial microparticles, then the film structure is formed, but the siloxane bonds are vulnerable to breaking by OH− ions, leading to film peeling and microparticle damage
Solution Approach 1:
The invention creates a composite film structure where antibacterial microparticles are embedded in a polymer matrix containing siloxane bonds (such as silane-modified polyurethane or epoxy resin). This composite structure provides mechanical strength and structural integrity while protecting the siloxane bonds from hydrolysis, ensuring both film formation and long-term antibacterial reliability.
Solution Approach 2:
The invention localizes the siloxane bonds within specific regions of the polymer matrix, creating areas of enhanced chemical resistance around the antibacterial microparticles. This localized structuring ensures that the siloxane bonds are positioned to provide structural support without being uniformly vulnerable to alkali attack, maintaining film integrity and antibacterial function.
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 formulation achieves excellent temporal stability, prevents caking, and maintains robust antibacterial properties even in alkali environments, ensuring the antibacterial film's longevity and effectiveness.
Implementation Method 1
the binder includes at least one compound having a siloxane bond
Implementation Method 2
an antibacterial microparticle contained in an antibacterial liquid... the concentration of solid contents is less than 5% by mass
Data Source
AI summary
Provided is an antibacterial liquid with excellent temporal stability in which caking due to sedimentation of solid components does not occur and with which a film capable of stably maintaining antibacterial properties can be formed, in a case of being formed into a film. Also provided are an antibacterial film formed using the antibacterial liquid, and a spray and a cloth including the antibacterial liquid. The antibacterial liquid includes an antibacterial microparticle, a binder, and a solvent, in which the antibacterial microparticle contains a silver-supporting inorganic oxide, the binder includes at least one compound having a siloxane bond, the solvent includes an alcohol and water, the concentration of solid contents is less than 5% by mass with respect to the total mass of the antibacterial liquid, and the content of the compound having a siloxane bond is 60% by mass or more with respect to the total solid content of the antibacterial liquid.