Perfluoropolyether Silane UV Resistance via Aromatic Linkers
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Solution Overview
Problem
Surface-treating layers formed using perfluoropolyether group-containing silane compounds often lack sufficient ultraviolet (UV) resistance, which is essential for durability in applications requiring UV exposure.
Innovation Solution
A perfluoro(poly)ether group-containing silane compound with a specific molecular structure, including a PFPE group and an alkylene linker, is developed to enhance UV resistance, providing a surface-treating agent that can be used as an antifouling or water-proof coating agent, forming a durable layer on base materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If perfluoropolyether group-containing silane compound is used for surface treatment, then water-repellency and oil-repellency are improved, but UV resistance deteriorates
Solution Approach 1:
The invention combines perfluoropolyether groups (providing water/oil repellency) with aromatic hydrocarbon groups (providing UV resistance) and silane groups (providing bonding capability) into a single composite molecular structure. This allows the surface treatment agent to simultaneously achieve water-repellency, oil-repellency, and UV resistance without requiring multiple separate coatings
Solution Approach 2:
Different functional groups are positioned at specific locations within the molecule: the perfluoropolyether groups are positioned to interact with water and oil surfaces, the aromatic hydrocarbon groups are positioned to absorb UV radiation, and the silane groups are positioned to bond with the substrate. This spatial arrangement allows each part of the molecule to perform its specific function optimally
2Ease of manufacture
If conventional perfluoropolyether silane compound is used, then ease of manufacture is improved, but durability under UV exposure deteriorates
Solution Approach 1:
The invention modifies the molecular structure by introducing aromatic hydrocarbon groups with specific parameters (conjugated double bonds, aromatic rings) that change the UV absorption characteristics. These parameter changes enable the molecule to resist UV degradation while maintaining the basic silane compound structure for ease of manufacture
3Illumination intensity
If surface-treating layer is formed with existing compound, then light permeability is improved, but UV resistance deteriorates
Solution Approach 1:
The aromatic hydrocarbon groups are positioned within the molecular structure to specifically interact with UV radiation while allowing visible light to pass through. The conjugated double bonds and aromatic rings are arranged to absorb UV energy without significantly affecting the transmission of visible light, thus maintaining optical clarity while providing UV protection
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 proposed solution significantly improves UV resistance and friction durability of the surface-treating layer, maintaining chemical stability and preventing degradation under UV irradiation and exposure to acidic or alkaline environments, while maintaining water-repellency and oil-repellency.
Implementation Method 1
having a hydrolyzable group bonding to a Si atom
Implementation Method 2
a layer formed from the present compound or surface-treating agent
Implementation Method 3
improves UV resistance... preventing degradation under UV irradiation
Implementation Method 4
maintaining water-repellency and oil-repellency
Data Source
AI summary
The present invention provides a perfluoro(poly)ether group containing a structure represented by -PFPE-X-SiRakRblRcm. For example, PFPE is a perfluoro(poly)ether group, X is a substituted or unsubstituted alkylene group having 2 to 20 carbon atoms, Ra is a functional group comprising a Si, Rc is a hydrogen atom or a lower alkyl group, k is an integer of 1 to 3, 1 and m are an integer of 0 to 2, respectively, and the sum of k, 1 amd m in each -SiRakRblRcm is 3.