Super-hydrophobic Flashover Coating with Hydrophobicity Migration
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Solution Overview
Problem
Existing anti-pollution flashover coatings for power grid equipment have low initial hydrophobicity and degrade over time, leading to reduced insulation strength and increased risk of pollution flashover accidents due to contaminant accumulation.
Innovation Solution
A super-hydrophobic anti-pollution flashover coating with hydrophobicity transference is developed by mixing a component A, comprising silicone resin, silicon oxide, and a silicone resin curing agent, with a specific mass ratio, to create a coating that maintains long-term hydrophobicity and self-cleaning properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If RTV anti-pollution flashover coating is applied to external insulation equipment, then the equipment gains pollution flashover protection, but the coating's hydrophobicity continuously decreases over service time
Solution Approach 1:
The patent changes the chemical composition parameters of the coating by incorporating fluorinated silicone resin and specific curing agents, which fundamentally alters the hydrophobicity degradation behavior. This compositional parameter change enables the coating to maintain super-hydrophobicity (contact angle >150°) throughout its service life, resolving the contradiction between providing protection and maintaining hydrophobicity over time
Solution Approach 2:
The patent creates a composite coating system by combining fluorinated silicone resin with specific curing agents and additives. This composite material approach integrates multiple functional components that work synergistically to provide both immediate pollution flashover protection and long-term hydrophobicity retention, addressing the temporal degradation issue
2Reliability
If conventional anti-pollution flashover coating is used, then initial hydrophobicity is provided, but the contact angle is only 110° to 120° which is insufficient for super-hydrophobic performance
Solution Approach 1:
The patent modifies the chemical composition parameters by introducing fluorinated groups and optimizing the resin-to-curing-agent ratio, which directly controls the surface energy and contact angle. This parameter optimization achieves super-hydrophobic performance with contact angles exceeding 150°, significantly improving upon the conventional 110°-120° range
Solution Approach 2:
The patent replaces conventional hydrophobic mechanisms with fluorinated silicone resin chemistry, which provides inherently lower surface energy and higher hydrophobicity. This chemical substitution enables the coating to achieve and maintain contact angles >150° without relying on complex surface texturing or mechanical structures
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 coating achieves improved hydrophobicity and anti-wetting ability, extending the service life of the coating and reducing the occurrence of pollution flashover accidents by maintaining super-hydrophobicity even after contamination.
Implementation Method 1
super-hydrophobic anti-pollution flashover coating with hydrophobicity transference
Implementation Method 2
A super-hydrophobic surface refers to a surface with a contact angle greater than 150° and a sliding angle less than 10°
Data Source
AI summary
The present invention provides a super-hydrophobic anti-pollution flashover coating with hydrophobicity transference, which is prepared from the following raw materials: a silicone resin, an organic solvent, silicon oxide, a flame retardant, a cross-linking agent, a coupling agent, a dispersing agent, a defoaming agent, a leveling agent, and a silicone resin curing agent. The present invention also provides a preparation method of the super-hydrophobic anti-pollution flashover coating with hydrophobicity transference. The anti-pollution flashover coating provided by the present invention has both super-hydrophobicity and hydrophobicity transference, which improves the hydrophobicity of a surface of an anti-pollution flashover coating layer, ensures the long-term effectiveness of an anti-pollution flashover coating layer, and prolongs a service life of an anti-pollution flashover coating layer, thereby solving the problem that existing anti-pollution flashover coatings have low hydrophobicity and are prone to contaminant accumulation on the surface and reducing the occurrence probability of pollution flashover accidents.