Superhydrophobic Composite Coating for Multi-Substrate Water Repellency
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Solution Overview
Problem
Current superhydrophobic materials struggle to achieve water contact angles greater than 100° on multiple substrates, and existing solutions often require specific substrate types and geometries, limiting their applicability and functionality.
Innovation Solution
A composite material comprising phosphate salts of lanthanum or cerium combined with organic phosphonic acids, processed through acid treatment and mixing with specific solvents, to create a surface with water contact angles exceeding 150°, compatible with various substrates and optionally incorporating additives for antibacterial and conductive properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional superhydrophobic materials are used, then water contact angles can reach >100° on specific substrates, but the contact angle exceeds 150° and applicability is limited to specific substrate types and geometries
Solution Approach 1:
The patent develops a universal superhydrophobic coating composition based on organometallic colloidal particles that can be applied to multiple substrate types (glass, metal, plastic, wood, cloth) with different geometries and surface properties. The coating achieves water contact angles exceeding 150° across all these diverse substrates, making the solution universally applicable rather than substrate-specific.
Solution Approach 2:
The patent modifies key parameters of the superhydrophobic coating system: using organometallic colloidal particles with specific surface chemistry, optimizing particle concentration and size distribution, and adjusting coating formulation to achieve contact angles >150°. These parameter changes enable the coating to work on diverse substrates while maintaining superior hydrophobicity.
2Manufacturing precision
If existing superhydrophobic solutions are applied, then water repellency can be achieved, but the coating process is complex and requires specific substrate preparation
Solution Approach 1:
The patent uses pre-synthesized organometallic colloidal particles with optimized surface properties, eliminating the need for complex in-situ synthesis or extensive substrate preparation. The colloidal particles are prepared beforehand with controlled size, shape, and surface chemistry, simplifying the coating application process while maintaining high water contact angles.
Solution Approach 2:
The patent simplifies the coating process by changing key parameters: using stable colloidal suspensions that can be applied via simple dip-coating or spray methods, optimizing particle concentration for single-step coating, and selecting organic solvents that evaporate quickly without requiring complex curing processes.
3Adaptability or versatility
If superhydrophobic coatings are applied to multiple substrate types, then versatility is improved, but maintaining stable and durable water repellency becomes difficult
Solution Approach 1:
The patent creates a composite coating system combining organometallic colloidal particles with organic ligands and surfactants. This composite structure provides both adhesion to diverse substrates and stable superhydrophobic properties. The organic components form a protective matrix that maintains coating integrity and water repellency across different substrate types and under various environmental conditions.
Solution Approach 2:
The patent uses organic ligands and surfactants as intermediary layers between the inorganic organometallic particles and the substrate surface. These intermediaries facilitate adhesion to diverse substrates while maintaining the superhydrophobic surface chemistry, ensuring both versatility and long-term stability of the coating.
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 composite material achieves high water repellency with contact angles >150° on multiple substrates, including glass, wood, plastic, metal, and cloth, while maintaining stability and durability, and exhibits antibacterial and icephobic properties without compromising water repellency.
Implementation Method 1
superhydrophobic materials that offer non-wetting, multi-substrate compatible, additive compatible and antibacterial coatings with high water contact angles >150°
Data Source
AI summary
The control over the wettability of any surface fundamentally determines its interaction with water. In this regard, artificial surfaces with high water repellency has been of particular interest. The present invention relates to the synthesis and applications of a ceramic composite comprising phosphates of the lanthanide/rare earth series and organic phosphonic acids leading to superhydrophobic materials that offer non-wetting, multi-substrate compatible, additive compatible and antibacterial coatings with high water contact angles >150°.