Crosslinked PDMS Coating for Oil-Repellent Metal Substrates
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Solution Overview
Problem
Current ventilation devices, especially those without oil vapor filtration, face issues with dust accumulation and potential fire hazards due to the combination of oil and fine dust, necessitating a solution for imparting oil-repellent and water-repellent properties to metal substrates.
Innovation Solution
A coating composition incorporating a crosslinked polydimethylsiloxane (PDMS) derivative and hexane as an organic solvent is applied to metal substrates, providing oil-repellent and water-repellent properties, suitable for microstructured oxide films, and can be used in various applications including oil vapor recovery apparatuses and pipelines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If ventilation devices operate without oil vapor filtration, then air circulation is maintained, but dust accumulates and fire hazards increase
Solution Approach 1:
The patent converts the harmful accumulation of oil and dust into a beneficial application by coating ventilation surfaces with a hydrophobic and oleophobic coating. This coating causes oil and dust to be repelled and easily removable, transforming the previously harmful accumulation problem into an easy maintenance benefit.
Solution Approach 2:
The coating composition provides self-cleaning properties by repelling oil and dust accumulation. The surface automatically resists contamination without requiring frequent manual cleaning, allowing the ventilation device to maintain its functionality with minimal maintenance intervention.
2Reliability
If super water-repellent surfaces are created on metal substrates, then water and oil repellency is achieved, but the process complexity increases
Solution Approach 1:
The patent achieves super water and oil repellency by changing the chemical composition parameters of the coating material. By formulating a specific coating composition containing hydrophobic and oleophobic agents, the surface achieves high contact angles for both water and oil without requiring complex multi-step processing.
Solution Approach 2:
The coating composition uses a composite material system combining hydrophobic agents, oleophobic agents, and carriers in specific ratios. This composite formulation achieves dual water and oil repellency simultaneously, simplifying the process compared to separate treatments.
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 composition effectively imparts excellent water-repellent and oil-repellent properties, reducing dust accumulation and fire risks, while being cost-effective and applicable to microstructured oxide films, thus enhancing the functionality and safety of ventilation systems.
Implementation Method 1
a crosslinked polydimethylsiloxane (PDMS) derivative represented by Chemical Formula 1; and one organic solvent of pentane, hexane, heptane, and octane
Implementation Method 2
imparting oil-repellent and water-repellent properties to the surface of a metal substrate
Data Source
AI summary
The present invention relates to a coating composition for imparting oil-repellent and water-repellent to the surface of a metal substrate, comprising a crosslinked PDMS derivative and hexane. The coating composition according to the present invention can impart water-repellent and oil-repellent by using a crosslinked PDMS derivative represented by chemical formula 1 and an organic solvent in a specific mixing ratio, is prepared at low cost, and is also applicable to coating of a microstructured oxide film since a coating film can be adjusted to have a thickness of several to tens of nanometers, and thus can be useful for oil vapor recovery apparatuses/facilities, pipes, hoods, parts of hoods, nozzles, pipe conduit and the like which require water-repellent and oil-repellent.