Method for sol-gel coating of textile materials
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Solution Overview
Problem
Current protective textiles for chemical and biological hazards lack a simple manufacturing process that balances filtration, repellency, and washability, particularly in addressing small polar toxic molecules and providing resistance to abrasion and washing while allowing air and moisture permeability.
Innovation Solution
A method for coating textiles using a sol-gel material without polycarboxylic acid or catalyst, employing metal alkoxides as precursors that form a porous solid material through hydrolysis and condensation, allowing for effective filtration of polar and nonpolar toxic gases and improved durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If waterproof material is used for protective suit, then protection from external threats is improved, but heat and moisture exchange deteriorates
Solution Approach 1:
The sol-gel matrix forms a porous coating on the textile that allows water vapor and air to pass through while providing chemical protection. The porous structure enables breathability and heat exchange, preventing hyperthermia during extended wear, while the coating maintains protection against liquid and gaseous threats.
2Reliability
If fluorine resin surface treatment is applied for repellency, then non-penetration of liquid warfare agents is improved, but weight and complexity increase
Solution Approach 1:
The patent extracts the repellency function from the bulk material and concentrates it in a thin sol-gel coating layer on the textile surface. This thin coating provides liquid repellency without the weight penalty of thick fluorine resin treatments, maintaining garment lightweight and flexibility.
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 coated textiles are flexible, lightweight, breathable, and resistant to abrasion and multiple washings, with enhanced barrier properties against toxic gases, demonstrating improved filtration performance and durability compared to previous methods.
Implementation Method 1
employing metal alkoxides as precursors that form a porous solid material through hydrolysis and condensation
Implementation Method 2
employing metal alkoxides as precursors that form a porous solid material through hydrolysis and condensation
Implementation Method 3
The resulting porous solid material is deposited on the textile material in a sol-gel coating which has the capacity to filter polar and non-polar toxic gases
Data Source
AI summary
The invention relates to a method for the coating of a textile material, said method comprising the following steps: d) providing a coating composition comprising an aqueous solvent and an organosilicon precursor; e) impregnating the textile material with the coating composition by means of pad finishing; f) drying the impregnated textile material; characterized in that the coating composition contains no polycarboxylic acid or catalyst.