A self-healing coating based on quinoline nano-metal-organic framework materials and its preparation method
A nano-metal and organic framework technology, applied in coatings, anti-corrosion coatings, etc., can solve problems such as insufficient release of zinc ions and phosphate ions, unable to protect damaged parts of the coating, poor water solubility, etc.
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Embodiment 1
[0018] The manganese complex based on 2,3-quinoline dicarboxylate [Mn 2 (2,3-qdc) 2 (H 2 O) 6 ·H 2 O] n The self-healing coating, characterized in that, 2,3-quinoline dicarboxylic acid manganese complex [Mn 2 (2,3-qdc) 2 (H 2 O)6·H 2 O] n Prepared by the following method: 6mmol (1.4773g) Mn(CH 3 COO) 2 4H 2 O, 3mmol (0.8136g) 2,3-qdc was added to a 50mL beaker, followed by adding 20mL distilled water and 10mL anhydrous methanol, stirring magnetically at room temperature for 10min until all the reagents were dissolved, then adjusting the pH to 6 with triethylamine, and stirring again 30min; transfer the mixed solution into a 50mL reaction kettle with a polytetrafluoroethylene bottle, put it into an oven and heat to 120°C for 6h. After 6 hours, turn off the oven and cool slowly to room temperature. A large amount of light yellow powder is formed. Centrifuge, wash with absolute ethanol and acetone alternately, and dry in a vacuum oven at 50°C for 6 hours to obtain 2.2...
Embodiment 2
[0022] The manganese complex [Mn(2,2'-bca)(1,10-phen)(H 2 O) 2 ] n The self-healing coating is characterized in that its 2,2'-diquinoline-4,4'-dicarboxylate manganese complex [Mn(2,2'-bca)(1,10-phen)(H 2 O) 2 ] n Prepared by the following method: 3mmol (1.0378g) 2,2'-bca was dissolved in 8mL DMF solution, placed in a 50mL beaker, and 20mL containing 6mmol (1.4820g) Mn(CH 3 OOH) 2 4H 2O distilled aqueous solution and 15 mL methanol solution containing 3 mmol (0.5491 g) 1,10-phen were magnetically stirred at room temperature for 10 min, adjusted to pH ≈ 6 with triethylamine, and then stirred for 30 min; Put it in the reaction kettle of vinyl fluoride bottle, put it into an oven and heat it to 120°C for 6h. After 6 hours, turn off the oven and cool slowly to room temperature. A large amount of yellow-brown powder is formed. Centrifuge, wash with absolute ethanol and acetone alternately, and dry in a vacuum oven at 50°C for 6 hours to obtain 1.2451 g of powder (referred to ...
Embodiment 3
[0026] The manganese complex based on 2,2'-diquinoline-4,4'-dicarboxylate [Mn 2 (2,2'-bca) 2 (H 2 O) 2 ] n The self-healing coating is characterized in that its 2,2'-diquinoline-4,4'-dicarboxylate manganese complex [Mn2(2,2'-bca) 2 (H 2 O) 2 ] n Prepared by the following method: 3mmol (1.0350g) 2,2'-bca was dissolved in 10mL DMF solution, placed in a 50mL beaker, and 20mL containing 6mmol (1.4761g) Mn(CH 3 OOH) 2 4H 2 Distilled aqueous solution of O, magnetically stirred at room temperature for 10 minutes, adjusted to pH ≈ 6 with triethylamine, and then stirred for 30 minutes; transferred the mixed solution into a 50 mL reaction kettle with a polytetrafluoroethylene bottle, and heated it in an oven to 120°C for reaction 6h. After 6 hours, turn off the oven and cool slowly to room temperature. A large amount of yellow-brown powder is formed. Centrifuge, wash alternately with absolute ethanol and acetone, and dry in a vacuum oven at 50°C for 6 hours to obtain 2.3761 g ...
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