Bilayer Superhydrophobic Coating for Abrasion and Flame Resistance
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Solution Overview
Problem
Existing superhydrophobic/superoleophobic coatings suffer from poor abrasion resistance, chemical instability, and lack of flame resistance, limiting their application scope and industrial viability.
Innovation Solution
A preparation method involving a multi-stage structure and polyfluorination strategy, using a fluorine-containing curing agent and a specific flame retardant (DOPO) to create a superhydrophobic/superoleophobic coating with improved adhesion, stability, and flame resistance, suitable for large-scale industrial application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flame retardants containing polar groups (phosphorus and nitrogen) are added to achieve flame resistance, then flame resistance is improved, but lyophobicity deteriorates and preparation difficulty increases
Solution Approach 1:
The patent applies local quality by creating a hierarchical micro-nano structure where the surface layer (nano level) provides lyophobicity through fluorine-containing compounds, while the bulk layer (micro level) contains flame retardants for flame resistance. This spatial separation allows each function to be optimized independently without mutual interference.
Solution Approach 2:
The patent uses composite materials by combining multiple components: fluorine-containing compounds for lyophobicity, epoxy resin for adhesion and matrix formation, and flame retardants for flame resistance. The composite structure integrates these functions into a single coating system that achieves all desired properties simultaneously.
2Stability of the object's composition
If superhydrophobic coating is prepared with micro-nano structure to achieve good mechanical and chemical stability, then chemical stability is improved, but abrasion resistance deteriorates
Solution Approach 1:
The patent segments the coating into multiple functional layers: a base layer providing mechanical strength and abrasion resistance, and a surface layer providing chemical stability and lyophobicity. This segmentation allows each layer to be optimized for its specific function without compromising the other.
Solution Approach 2:
The patent uses a flexible shell approach where a durable base coating serves as the structural foundation, and a thinner surface coating provides the lyophobic property. This thin film on robust base structure combination maintains both mechanical strength and chemical stability.
3Reliability
If hydrophobic and oleophobic fabric is applied to achieve electricity conduction and fire prevention, then fire prevention is improved, but ease of expansion to industrial production deteriorates
Solution Approach 1:
The patent replaces the mechanical fabric modification approach with a chemical coating system that can be applied via spraying or dipping. This substitution enables easier industrialization as the coating process can be integrated into existing manufacturing lines without requiring complex fabric modification equipment.
Solution Approach 2:
The patent changes the application method from mechanical fabric modification to chemical coating application, and can adjust parameters such as coating thickness, composition ratios, and application speed to optimize for industrial production scalability while maintaining fire prevention performance.
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 exhibits excellent repellency to water and various liquids, withstands harsh physical abrasion, and provides effective flame resistance, with potential for large-scale industrial application on various substrates, including organic and inorganic materials.
Implementation Method 1
the coating exhibits excellent repellency to water and various liquids
Implementation Method 2
superhydrophobic/superoleophobic coating
Implementation Method 3
withstands harsh physical abrasion
Implementation Method 4
provides effective flame resistance
Implementation Method 5
flame retardant (DOPO) to create a superhydrophobic/superoleophobic coating with improved adhesion, stability, and flame resistance
Implementation Method 6
improved adhesion, stability, and flame resistance
Data Source
AI summary
Provided are an abrasion-resistant, stable and flame-resistant superhydrophobic/superoleophobic coating, and a preparation and application thereof, belonging to the field of new materials; the preparation includes: taking a superhydrophobic/superoleophobic suspension as a top-layer spraying solution; dispersing epoxy resin in a solvent, and adding a fluorine-containing curing agent and a flame retardant for reaction to obtain a bottom-layer spraying solution; and first spraying the bottom-layer spraying solution to a surface of a substrate, then spraying the top-layer spraying solution, and drying the surface to obtain a bilayer abrasion-resistant superhydrophobic flame-resistant coating; the superhydrophobic/superoleophobic suspension contains multi-level micro nano structural particles, a fluorine-containing curing agent and fluorinated epoxy resin; the prepared single-layer coating and bilayer structure (BLC) have hydrophobicity, flame resistance, good mechanical properties and excellent corrosion resistance performance.