Quaternary Ammonium Textile Composition for Wash-Durable Antimicrobial Binding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current antimicrobial products face challenges such as transient antimicrobial properties, toxicity concerns, leaching into the environment, development of antimicrobial resistance, poor wash durability, skin toxicity, and adverse skin reactions, as well as issues with color retention and odor emission, particularly in textiles intended for daily wear and hygiene applications.
Innovation Solution
A quaternary ammonium salt-based antimicrobial composition is developed, combined with a binder and stabilizing agent, which provides strong, stable binding to textiles, ensuring long-lasting antimicrobial activity without leaching, skin toxicity, and maintaining environmental safety through controlled release and biodegradability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If conventional antimicrobial agents are used to provide antimicrobial protection, then antimicrobial activity is achieved, but the protection is transient and leaching occurs into the environment
Solution Approach 1:
The antimicrobial agent is pre-bound to the textile substrate through chemical or physical bonding mechanisms before use. This preliminary binding action ensures that the antimicrobial agent remains attached to the textile during washing and use, preventing leaching while maintaining prolonged antimicrobial activity. The agent is prepared in advance to be released only when needed, not washed away.
Solution Approach 2:
A binder or carrier substance is introduced as an intermediary between the antimicrobial agent and the environment. This intermediary holds the antimicrobial agent on the textile surface, allowing it to exert its effect while preventing direct leaching into water or soil. The binder acts as a controlled release mechanism, mediating between the agent and external environment.
2Reliability
If higher concentrations of antimicrobial agents are used to enhance efficacy, then antimicrobial activity increases, but toxicity to humans and environmental damage increases
Solution Approach 1:
The invention changes the parameters of antimicrobial agent delivery by using lower concentrations combined with controlled release mechanisms. Instead of relying on high initial concentrations, the system maintains effective levels over time through sustained release, reducing peak toxicity while preserving efficacy. The release rate parameter is optimized to balance safety and effectiveness.
Solution Approach 2:
The patent employs biodegradable antimicrobial agents that function effectively for their intended service life and then break down into harmless substances. These short-lived agents provide sufficient protection during use but decompose afterward, eliminating persistent toxicity concerns. The agents are designed to be environmentally benign after their functional lifetime.
3Duration of action of stationary object
If antimicrobial treatments are applied to textiles for extended protection, then long-duration antimicrobial properties are achieved, but wash durability decreases and skin toxicity may occur
Solution Approach 1:
The antimicrobial agent is pre-bound to textile fibers through chemical bonding or encapsulation before the textile undergoes washing. This preliminary attachment ensures that the agent survives subsequent washing cycles, maintaining wash durability. The binding is performed in advance to create a robust connection that withstands mechanical and chemical stress of laundering.
Solution Approach 2:
The invention creates a composite structure where the antimicrobial agent is integrated with the textile matrix through binders, polymers, or encapsulation materials. This composite approach provides both long-duration activity and wash durability, as the composite structure protects the agent during washing while allowing controlled release during use. The combination of materials achieves properties neither component alone could provide.
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 high wash durability, maintaining over 98% antimicrobial activity after 30 washes, prevents microbial growth, and ensures safety and comfort on human skin, while being environmentally friendly and biodegradable, addressing all mentioned challenges simultaneously.
Implementation Method 1
the QAS provides an ammonium cation to bind to an anionic site in a controlled environment
Implementation Method 2
a polar hydrogen in the QAS is capable to attach to a binder
Data Source
AI summary
Disclosed is a method for formulating an antimicrobial composition. The method comprises treating a quaternary ammonium salt (QAS) in a reaction mixture. The QAS is one or more of didecyl dimethyl ammonium chloride, dioctyl dimethyl ammonium chloride, ethyl benzyl dimethyl ammonium chloride, cetyl dimethyl ammonium bromide, and dioctyl dimethyl ammonium sulphate, octyl decyl dimethyl ammonium chloride, pyridium QUAT, and a combination thereof. The method further comprises reacting the QAS with one or more binders in the reaction mixture. The binder is a reactive polymeric compound, an aqueous aliphatic polyurethane emulsion, an aqueous acrylic polymer, a modified acrylic polymer, a methacrylate polymer, a reactive polyhexamethylene biguanide (PHMB), an aqueous polydiallyl dimethyl ammonium chloride (DADMAC) polymer, or a certain combination thereof. Finally, the method comprises stabilizing the reaction mixture with one or more stabilizing agent. The stabilizing agent is selected from a group of glycol.