Staple Fiber Surface Modification for Durable Hydrophobicity
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Solution Overview
Problem
Existing methods for rendering textiles hydrophobic, such as using fluorinated molecules or topical coatings, are inadequate as they compromise mechanical strength, breathability, and compatibility with finishes like dyeing or antimicrobial agents, and these coatings can be washed off, losing their effectiveness.
Innovation Solution
Incorporating surface modifying molecules into polymer matrices within staple fibers that can be anchored and released during fabric processing, allowing for in-situ modification of hydrophobicity and other properties like insect repellency or UV protection, triggered by environmental changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If topical coatings of hydrophobic molecules are applied to fabric, then hydrophobicity is improved, but mechanical strength deteriorates and coatings can be removed during use or washing
Solution Approach 1:
The patent incorporates surface modifying molecules into the fiber structure during manufacturing, so that the hydrophobic functionality is built-in from the beginning rather than applied as a separate coating step. This preliminary integration ensures the hydrophobic properties are inherent to the fiber and will not be removed during subsequent use or washing.
Solution Approach 2:
The patent combines the fiber matrix and surface modifying molecules into a single integrated structure. The surface modifying molecules are incorporated within the fiber during extrusion, merging the structural and functional components into one unified material that maintains mechanical strength while providing durable hydrophobicity.
2Object-affected harmful factors
If inherently hydrophobic materials like PTFE are used, then hydrophobicity is improved, but mechanical function and compatibility with finishes deteriorate
Solution Approach 1:
The patent applies surface modifying molecules only to the surface region of the fiber, while the core fiber material retains its original properties. This localized modification allows the fiber to maintain its inherent compatibility with dyeing and finishing processes in the core, while the surface provides the desired hydrophobic functionality.
Solution Approach 2:
The patent creates a composite fiber structure where a polymer matrix is combined with surface modifying molecules. This composite approach allows the fiber to exhibit both the hydrophobic properties of the surface modifying molecules and the processing compatibility of the base polymer, enabling subsequent dyeing and finishing operations.
3Object-affected harmful factors
If surface modification is applied to blend fibers, then hydrophobicity is improved, but uniformity of modification deteriorates
Solution Approach 1:
The patent processes fibers individually through the extrusion process, where surface modifying molecules are incorporated into each fiber as it is formed. This segmentation approach ensures that each fiber receives uniform surface modification independently, and when blended fibers are processed, each fiber type can be uniformly modified according to its own characteristics.
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
This approach enables stable, uniform surface modification of textiles that maintains mechanical strength and breathability while allowing for controlled release of active agents, ensuring long-lasting hydrophobicity and additional functional properties.
Implementation Method 1
The anchor molecule and surface modifying molecule may be added to a melt phase of the polymer matrix and converted into staple fibers
Implementation Method 2
The anchor molecule has reactive functional groups and is a polymeric or oligomeric molecule
Implementation Method 3
The anchor molecule has reactive functional groups and is a polymeric or oligomeric molecule
Implementation Method 4
The anchor molecule has reactive functional groups and is a polymeric or oligomeric molecule
Implementation Method 5
The anchor molecule has reactive functional groups and is a polymeric or oligomeric molecule
Implementation Method 6
This may, for example, render a fabric hydrophilic or hydrophobic
Implementation Method 7
This may, for example, render a fabric hydrophilic or hydrophobic
Implementation Method 8
The carriers may then release these surface modifying molecules into the surroundings on application of a trigger such as a change in humidity, a change in pressure, application of a current, exposure to radiation
Data Source
AI summary
Staple fibers and compositions formed from staple fibers are disclosed herein. The fibers are functionalized with molecules that render fabrics comprising the disclosed fibers hydrophobic, hydrophilic, and/or release molecules upon exposure to an external stimulus. Also presented are methods of synthesizing the same and a fabric comprising woven yarns including the staple fiber.