Antibacterial Textile Composition to Prevent Nano Silver Yellowing

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Solution Overview

Problem

Nano silver-based antibacterial textiles suffer from yellowing issues when used in textiles, leading to aesthetically unpleasant appearance and reduced antibacterial efficacy.

Innovation Solution

A composition comprising silver nano particles and a protective agent, such as MCl, MBr, MI, or MS2O3, with a molar ratio of 1:0.995-1, applied to textiles to minimize yellowing, while maintaining antibacterial efficacy, using methods like dip dyeing, coating, or printing, and including an adhesive resin for improved adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If silver ions or nano silver are added to textiles to achieve antibacterial effect, then antibacterial efficacy is improved, but yellowing occurs on the textile

Engineering Contradiction:

Improveantibacterial efficacyVSAvoidyellowing

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent introduces a protective agent as an intermediary substance that forms a protective layer around silver particles. This mediator prevents direct interaction between silver and textile fibers that causes yellowing, while still allowing antibacterial activity to occur. The protective agent acts as a buffer between the antibacterial agent (silver) and the textile substrate.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent creates a composite structure by combining silver particles with a protective agent to form a composite antibacterial composition. This composite material integrates the antibacterial properties of silver with the protective, yellowing-prevention properties of the protective agent, achieving both functions simultaneously.

Inventive Principle:

Principle #40Composite materials

2Reliability

If nano silver is applied to textile to achieve strong antibacterial capability, then antibacterial function is improved, but yellowing occurs within 12 hours

Engineering Contradiction:

Improveantibacterial functionVSAvoidcolor stability

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The protective agent provides beforehand cushioning by forming a protective barrier around silver particles before they can interact with the textile and cause yellowing. This pre-protective measure prevents the harmful yellowing effect from occurring in the first place, while maintaining the antibacterial function over extended periods.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The protective agent serves as an intermediary that separates the silver particles from direct contact with textile fibers, preventing the rapid yellowing that occurs within 12 hours when silver is applied directly. This mediator layer allows the antibacterial function to persist without the color degradation.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If silver ions are used to provide antibacterial effect, then bactericidal capability is improved, but yellow spots are generated on textile

Engineering Contradiction:

Improvebactericidal capabilityVSAvoidyellow spots

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The protective agent acts as an intermediary substance that allows silver ions to exert their bactericidal capability while preventing them from directly staining the textile with yellow spots. The protective layer mediates between the silver ions and the textile substrate.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent extracts or separates the harmful yellowing effect from the beneficial bactericidal capability by using the protective agent to isolate the silver particles. This allows the antibacterial function to be maintained while the yellowing side effect is removed or prevented.

Inventive Principle:

Principle #2Taking out (Extraction)

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 solution effectively reduces the occurrence of yellowing in antibacterial textiles, maintaining strong antibacterial properties and adhering to environmental protection standards by controlling the release of free active silver ions.

Implementation Method 1

A composition comprising silver nano particles and a protective agent, such as MCl, MBr, MI, or MS2O3, with a molar ratio of 1:0.995-1, applied to textiles to minimize yellowing

Methodology Applied

Scientific EffectProtective layer formation:

Implementation Method 2

the concentration of free active silver ions released by the silver nano particles in the antibacterial composition is 0-2 ppm

Methodology Applied

Scientific EffectIon release:

Data Source

PatentUS8414659B2Antibacterial composition and methods of fabricating antibacterial textile

Publication Date: 2013.04.09 TAIWAN TEXTILE RESEARCH INSTITUTE

AI summary

An antibacterial composition including silver nano particles, a protective agent and water is provided. The molar ratio of the silver nano particles to the protective agent is 1:0.995-1 and the protective agent is selected from a group consisting of MCl, MBr, MI, MS2O3 and NH4OH, in which M represents an element of group IA or IIA. Furthermore, two methods of fabricating an antibacterial textile are also provided.