Substrate coatings: systems, methods, and techniques
AssigneeNorth Carolina State University
InventorsJan Genzer, Pandiyarajan Chinnayan Kannan, Michael D. Dickey, Kirill Efimenko
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Abstract
Systems and methods relate to applying a coating to a substrate. Coatings can be generated using layer-by-layer application techniques. Typically, application of a first aqueous solution is alternated with application of a second aqueous solution. Example first aqueous solutions include polyethyleneimine (PEI) and hydroxy-terminated poly(dimethylsiloxane) (PDMS-OH). Example second aqueous solutions include silicate and PDMS-OH. In some instances, first aqueous solutions and/or second aqueous solutions additionally include methyl-terminated PDMS (PDMS-CH3).
Claims20
A method for generating a coating on a substrate, the method comprising:
- depositing a first aqueous solution onto the substrate, thereby forming a first layer,
- wherein the first aqueous solution includes branched polyethyleneimine (PEI) and hydroxy-terminated poly(dimethylsiloxane) (PDMS-OH);
- and
- depositing a second aqueous solution onto the first layer, thereby forming a second layer,
- wherein the second aqueous solution includes silicate and PDMS-OH.
A system for applying a coating to a substrate, the system comprising:
- a first aqueous solution source including a first aqueous solution, the first aqueous solution including polyethyleneimine (PEI), hydroxy-terminated poly(dimethylsiloxane) (PDMS-OH) and methyl-terminated PDMS (PDMS-CH3);
- a second aqueous solution source including a second aqueous solution, the second aqueous solution including sodium silicate, PDMS-OH, and PDMS-CH3;
- and
- a deposition assembly in fluid communication with both the first aqueous solution source and the second aqueous solution source, the deposition assembly configured to apply layer-by-layer coatings.
A substrate including a coating, the coating comprising:
- a first layer including polyethyleneimine (PEI), hydroxy-terminated poly(dimethylsiloxane) (PDMS-OH), and methyl-terminated PDMS (PDMS-CH3);
- and
- a second layer including sodium silicate, PDMS-OH, and PDMS-CH3,
- wherein the substrate is one of:
- silicon wafer material, glass material, polymer sheet material, or metal material.
Dependencies are inferred from the claim text.