Preparation method of amino-rich conversion coating, functional material and application
A conversion coating, amine-rich technology, applied in the field of preparation of amine-rich conversion coatings, can solve the problems of limited release amount of surface active molecules, limited application, difficult to meet physiological environment and other problems
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[0021] An embodiment of the present invention provides a method for preparing a rich amine-based conversion coating, comprising the following steps:
[0022] S1, chelate NO catalytically active molecules
[0023] The chelating reaction of carboxyl-containing macrocyclic polyamines and molecules with NO catalytic activity is carried out, and the NO catalytically active molecules are introduced by utilizing the chelation effect of N in the carboxyl-containing macrocyclic polyamines.
[0024] Specifically, the carboxyl-containing macrocyclic polyamine compound is selected from 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid (DOTA), NHS-DOTA, tri-tertiary Butyl 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid, 1,4,7,10-tetraazacyclododecane-1,4,7 , At least one of 10-tetraacetic acid tri-tert-butyl ester, porphyrin and 8-hydroxyquinoline and derivatives thereof. The above polyamine compounds are suitable for chelating NO catalytically active molecules such as co...
Embodiment 1
[0056] The present embodiment provides a preparation method of an amine-rich conversion coating, and selects 316L stainless steel as the base material prepared by the coating, including the following steps:
[0057] (1) Preparation of modified amine compounds
[0058] Dissolve 1 mg / mL DOTA containing 4 carboxyl groups in MES buffer solution with pH adjusted to 5.6, add EDC and NHS (the molar ratio of EDC and carboxyl groups is 5:1, and the molar ratio of NHS and carboxyl groups is 1:1, the same below). ), reacted at 37 °C for 24 h, and added Cu with a molar ratio of 1:1 to macrocyclic polyamines 2+ , ultrasonic response 0.3h.
[0059] 3.5 mg / mL of polyallylamine (weight-average molecular weight 8,000, 20 wt. % aqueous solution) was added, and after reacting at 37° C. for 24 h, the sample was purified by dialysis.
[0060] (2) Preparation of ortho-phenolic polymer modified coating
[0061] Clean the surface of 316L stainless steel and dry it for later use. The 316L stainles...
Embodiment 2
[0065] The present embodiment provides a preparation method of an amine-rich conversion coating, and selects 316L stainless steel as the base material prepared by the coating, including the following steps:
[0066] (1) Preparation of modified amine compounds
[0067] Dissolve 1 mg / mL DOTA containing 4 carboxyl groups in MES buffer solution with pH adjusted to 5.6, add EDC and NHS, react at 37 °C for 24 h, add Cu with a molar ratio of 1:1 to macrocyclic polyamines 2+ , ultrasonic response 0.3h.
[0068] 2 mg / mL of polyallylamine (weight average molecular weight 17,000, 20 wt.% in H2O) was added, and after reacting at 37° C. for 24 h, the sample was purified by dialysis.
[0069] (2) Preparation of ortho-phenolic polymer modified coating.
[0070] Clean the surface of 316L stainless steel and dry it for later use. The 316L stainless steel was immersed in a solution of dopamine with a concentration of 1 mg / mL dissolved in a solution of pH 8.5 adjusted by Tris-base, reacted at...
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