Method for simultaneously achieving superhydrophobic and superoleophobic surface on 1000 series aluminum alloy in anodic oxidation process without pre-patterning step
AssigneeDong-Eui University Industrial-Academic Cooperation Foundation
InventorChanyoung Jeong
Life of this patent
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Abstract
A method for manufacturing a superhydrophilic anodic oxide film on a 1000 series aluminum alloy according to the present invention can manufacture a uniform anodic oxide film even without a pre-patterning step, thereby reducing manufacturing costs, and can impart superhydrophobicity and superoleophobicity to the anodic oxide film due to a coating composition using a cross-linked PDMS derivative represented by Chemical Formula 1 and an organic solvent in a specific mixing ratio, wherein the coating composition is inexpensive to manufacture and can be applied to the coating of a microstructured oxide film because a coating film thickness can be adjusted from several to several tens of nm.
Claims15
A manufacturing method of an oleophobic and hydrophobic film on a 1000 series aluminum alloy, comprising:
- a step of performing primary anodic oxidation on a 1000 series aluminum alloy for 1 to 10 minutes at 35 to 45 V (step 1);
- a step of performing pore widening by immersing the alloy in 0.05 to 1.0 M phosphoric acid (H3PO4) solution for 10 to 100 minutes (step 2);
- a step of performing secondary anodic oxidation for 1 to 10 minutes at 35 to 45 V (step 3);
- and
- a step of coating with a coating composition including a cross-linked polydimethylsiloxane (PDMS) derivative represented by Chemical Formula 1 and an organic solvent (step 4),
- wherein prior to step 1, a pre-patterning process is omitted,
- wherein in Chemical Formula 1, x and y are each an integer of 1 to 30.
Dependencies are inferred from the claim text.