Fluid resistant coatings for substrates
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Solution Overview
Problem
Substrates with hydrophobic surfaces often comprise fluorinated polymers, which have undesirable environmental effects, necessitating the development of alternative materials that provide hydrophobic and/or oleophobic properties without these drawbacks.
Innovation Solution
The formation of nanostructures on substrates, such as textiles, using plasma deposition methods that involve exposing the surface to a monomer plasma to create polymer nanostructures, followed by the application of a polymerized silane and/or siloxane layer, without etching, to achieve hydrophobic and/or oleophobic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorinated polymers are used to create hydrophobic surfaces, then hydrophobicity and oleophobicity are achieved, but environmental harm increases
Solution Approach 1:
The patent changes the chemical composition parameters by replacing fluorinated polymers with silicon-based polymers (polymerized silane and/or siloxane). This substitution maintains the hydrophobic and oleophobic properties through different chemical mechanisms, thereby eliminating the environmental harm associated with fluorinated compounds while preserving the desired water and oil resistance
Solution Approach 2:
The patent employs composite material structures by combining polymerized silane and/or siloxane with existing substrate materials. This composite approach creates a coating layer that provides both the protective hydrophobic/oleophobic properties and environmental compatibility, resolving the contradiction between performance and environmental impact
2Reliability
If plasma deposition is used to form nanostructures, then hydrophobicity and oleophobicity are enhanced, but process complexity increases
Solution Approach 1:
The patent merges multiple functions into a single plasma deposition process. The plasma treatment simultaneously achieves surface activation, polymer formation, and hydrophobic/oleophobic coating application in one integrated step, reducing the number of separate processing stages and equipment requirements despite the advanced functionality achieved
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 method results in substrates with enhanced hydrophobicity and oleophobicity, offering improved water and oil resistance, particularly suitable for textiles, while avoiding the use of environmentally harmful fluorinated polymers.
Implementation Method 1
exposing a surface of a substrate to a plasma comprising a monomer; and producing a plurality of nanostructures on the surface without etching the surface, wherein the plurality of nanostructures comprises a polymer formed from the monomer
Implementation Method 2
etching the first layer by exposing the first layer to a second plasma to form an etched first layer
Implementation Method 3
positioning a metal electrode proximate a first surface of a textile; sputtering metal nanoparticles off the electrode and onto the surface of the textile
Data Source
AI summary
Articles that are oleophobic and/or hydrophobic, as well as associated methods, are generally provided. In some embodiments, articles described herein do not comprise fluorinated polymers. Articles described herein may comprise nanostructures that contribute to their hydrophobicity and/or their oleophobicity. Articles described herein may have high wash resistance.