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Dihydroxynaphthalene-based mimicry of fungal melanogenesis for multifunctional coatings.

Jeon JR, Le TT, Chang YS - Microb Biotechnol (2016)

Bottom Line: This product, termed poly(2,7-DHN), was successfully deposited onto a wide variety of solid surfaces, including metals, polymeric materials, ceramics, biosurfaces and mineral complexes.The melanin-like polymerization could be used to co-immobilize other organic molecules, forming functional surfaces.Moreover, the novel physicochemical properties of the poly(2,7-DHN) illuminate its potential applications as bactericidal, radical-scavenging and pollutant-sorbing agents.

View Article: PubMed Central - PubMed

Affiliation: Institute of Agriculture & Life Science, Gyeongsang National University, Jinju, 52727, Korea.

No MeSH data available.


Related in: MedlinePlus

A. Dopamine (top) and 2,7‐DHN (down) coated PET. Half region of each PET film was soaked in the corresponding media for 10 s.B. Colour value change of the coated PET films before and after the soaking. The colour value (ΔE) of PET film was calculated using the equation: ΔE = [(100 − L*)2 + (a*)2 + (b*)2]1/2.
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mbt212347-fig-0002: A. Dopamine (top) and 2,7‐DHN (down) coated PET. Half region of each PET film was soaked in the corresponding media for 10 s.B. Colour value change of the coated PET films before and after the soaking. The colour value (ΔE) of PET film was calculated using the equation: ΔE = [(100 − L*)2 + (a*)2 + (b*)2]1/2.

Mentions: The applicability of a coated layer depends on its robustness against external stresses because one of the main purposes of coating is the protection of the surfaces to be coated. The robustness of the coated layers was therefore evaluated by employing a PET film, which is frequently used in the coating industry. The layers were seen to exhibit excellent resistance against 1 N hydrochloric acid and 1 N sodium chloride, but treatment with either 1 N alkaline solution or organic solvents (i.e., methanol, acetone, 2‐propanol and 1,4‐dioxane) led to an immediate disruption of the polymeric matrix, followed by complete detachment of the coating (Fig. 2A and B). These results indicate that the poly(2,7‐DHN) was relatively stable under mild conditions but not under harsh alkaline and organic solvent conditions. The immediate detachment of the enzymatically synthesized poly(2,7‐DHN) from the film strongly supports the proposal that the sorption between the polymeric material and the solid surfaces resulted from non‐covalent interactions rather than from covalent linkages between them.


Dihydroxynaphthalene-based mimicry of fungal melanogenesis for multifunctional coatings.

Jeon JR, Le TT, Chang YS - Microb Biotechnol (2016)

A. Dopamine (top) and 2,7‐DHN (down) coated PET. Half region of each PET film was soaked in the corresponding media for 10 s.B. Colour value change of the coated PET films before and after the soaking. The colour value (ΔE) of PET film was calculated using the equation: ΔE = [(100 − L*)2 + (a*)2 + (b*)2]1/2.
© Copyright Policy - creativeCommonsBy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4835569&req=5

mbt212347-fig-0002: A. Dopamine (top) and 2,7‐DHN (down) coated PET. Half region of each PET film was soaked in the corresponding media for 10 s.B. Colour value change of the coated PET films before and after the soaking. The colour value (ΔE) of PET film was calculated using the equation: ΔE = [(100 − L*)2 + (a*)2 + (b*)2]1/2.
Mentions: The applicability of a coated layer depends on its robustness against external stresses because one of the main purposes of coating is the protection of the surfaces to be coated. The robustness of the coated layers was therefore evaluated by employing a PET film, which is frequently used in the coating industry. The layers were seen to exhibit excellent resistance against 1 N hydrochloric acid and 1 N sodium chloride, but treatment with either 1 N alkaline solution or organic solvents (i.e., methanol, acetone, 2‐propanol and 1,4‐dioxane) led to an immediate disruption of the polymeric matrix, followed by complete detachment of the coating (Fig. 2A and B). These results indicate that the poly(2,7‐DHN) was relatively stable under mild conditions but not under harsh alkaline and organic solvent conditions. The immediate detachment of the enzymatically synthesized poly(2,7‐DHN) from the film strongly supports the proposal that the sorption between the polymeric material and the solid surfaces resulted from non‐covalent interactions rather than from covalent linkages between them.

Bottom Line: This product, termed poly(2,7-DHN), was successfully deposited onto a wide variety of solid surfaces, including metals, polymeric materials, ceramics, biosurfaces and mineral complexes.The melanin-like polymerization could be used to co-immobilize other organic molecules, forming functional surfaces.Moreover, the novel physicochemical properties of the poly(2,7-DHN) illuminate its potential applications as bactericidal, radical-scavenging and pollutant-sorbing agents.

View Article: PubMed Central - PubMed

Affiliation: Institute of Agriculture & Life Science, Gyeongsang National University, Jinju, 52727, Korea.

No MeSH data available.


Related in: MedlinePlus