Multifunctional Silane Coating for Hardened Display Surfaces
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Solution Overview
Problem
Existing display device coatings face challenges in achieving both high mechanical properties and effective anti-fouling and hydrophobic effects, with fluorine-containing auxiliary agents providing limited anti-fouling and hydrophobicity, and organosilicon or fluorocarbon films lacking robust mechanical properties.
Innovation Solution
A multifunctional modified silane compound is developed, incorporating a cyclic rigid structure, a fluorine-containing structure, a polar group, and a polyfunctional (meth)acrylate with three or more (meth)acryloyloxy groups, formed through a specific reaction method involving vinyl group-containing siloxanes, cyclic structure-containing acrylates, fluoroalkyl acrylates, and polar group-containing propenes, to create a hardened coating layer with enhanced mechanical, anti-fouling, and water-repellent properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a fluorine-containing auxiliary agent is added to the hardened coating layer, then good mechanical properties can be obtained, but the anti-fouling and hydrophobic effect is limited and water contact angle is difficult to exceed 110°
Solution Approach 1:
The patent combines fluorine-containing structures with silane cross-linking networks in a single coating formulation. The fluorinated silane compound integrates both the mechanical strength-providing silane backbone and the hydrophobic fluorine substituents, allowing simultaneous achievement of high mechanical properties and superior anti-fouling performance with water contact angle exceeding 110°.
Solution Approach 2:
The invention uses composite material strategy by incorporating fluorinated silane compounds that contain both inorganic silane moieties (for mechanical strength through cross-linking) and organic fluorinated groups (for hydrophobicity). This composite structure at molecular level enables the coating to exhibit both high mechanical properties and excellent anti-fouling characteristics.
2Object-affected harmful factors
If organosilicon or fluorocarbon material is applied on the surface of the display to cure into a film, then the film can provide coating protection, but the film is not highly cross-linked and it is difficult for this film to have good mechanical properties
Solution Approach 1:
The patent changes the cross-linking density parameter by using highly functional silane compounds with multiple reactive groups. This enables formation of densely cross-linked networks that significantly enhance mechanical properties while maintaining the protective coating function. The high cross-linking density is achieved through multifunctional silane structures that create extensive three-dimensional networks.
Solution Approach 2:
The invention applies local quality principle by creating highly cross-linked regions within the coating structure through silane condensation reactions. These densely cross-linked zones provide exceptional mechanical strength and hardness, while the overall coating maintains its protective function. The local high cross-linking density differentiates this from conventional organosilicon coatings with uniform low cross-linking.
3Strength
If a hardened coating layer is designed to have high mechanical properties, then scratch resistance and hardness are improved, but the anti-fouling and water repellent properties are compromised
Solution Approach 1:
The patent achieves multi-functionality by designing fluorinated silane compounds that simultaneously provide mechanical strengthening through silane cross-linking and hydrophobic anti-fouling properties through fluorine substituents. A single coating formulation delivers both high scratch resistance/hardness and excellent water repellency, eliminating the need to choose between these opposing properties.
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 resulting hardened coating layer exhibits improved mechanical properties, with pencil hardness of ≤4 H, steel wool abrasion resistance ≥100 cycles, and a water contact angle ≥115°, along with increased adhesion force, effectively addressing the limitations of previous coatings.
Implementation Method 1
reacting the first nitrogen with the first vinyl group-containing siloxane, the cyclic structure-containing acrylate and the first photoinitiator under first light to form a first reaction solution
Implementation Method 2
R2 includes a fluorine-containing structure
Data Source
AI summary
A multifunctional modified silane compound and a manufacture method thereof, as well as a hardened coating layer and a manufacture method thereof are provided. Material of a hardened coating layer includes a multifunctional modified silane compound including R1, R2, R3 and R4. R1 includes a cyclic rigid structure, R2 includes a fluorine-containing structure, R3 includes a polar group, and R4 includes a polyfunctional (meth)acrylate having three or more (meth)acryloyloxy groups.