A kind of modified polyaniline anticorrosion coating and preparation method thereof
An anti-corrosion coating and polyaniline technology, applied in the field of materials, can solve the problems of weak adhesion, insolubility, and limitation of the paint film, and achieve the effects of high industrial application value, long service life and simple preparation process.
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Embodiment 1
[0037] A kind of preparation method of modified polyaniline anticorrosion coating, concrete steps are:
[0038] 1) Step 1: Take 13.0000 g of 1,1′-ferrocenedicarboxylic acid and measure 200 mL of anhydrous dichloromethane into a 500 mL three-necked flask, then add 20 mL of oxalyl chloride and 10 drops of pyridine into the The system was stirred in a cold water bath for 12 h under the protection of nitrogen and protected from light. Return to room temperature and reflux for 6 h. After the reaction was completed, it was evaporated to dryness under reduced pressure at 40 °C. After the residue was repeatedly extracted with petroleum ether at 80 °C, it was recrystallized to obtain dark red crystals (1,1′-ferrocenedicarboxylic acid chloride).
[0039] 2) Step 2: Weigh 9.3282 g of 1,1′-ferrocenedicarboxylic acid chloride and dissolve it in 180 mL of anhydrous dichloromethane, and add the above solution dropwise to 11.0520 g of aniline and 22 mL of triethylamine within 80 min Amine ...
Embodiment 2
[0046] A kind of preparation method of modified polyaniline anticorrosion coating, concrete steps are:
[0047] 1) Step 1: Same as Example 1.
[0048] 2) Step 2: Same as Example 1.
[0049] 3) Step 3: Add 2.1214 g of 1,1′-ferrocenylaniline monomer and 0.7450 g of aniline to a mixture of 20 mL of dimethylformamide and 50 mL of 1 mol / L perfluorooctanoic acid aqueous solution, and stir to dissolve for 30 min , to obtain the first mixture.
[0050] 4) Step 4: 2.0538 g of ammonium persulfate was dissolved in 10 mL of 1 mol / L acetic acid aqueous solution, stirred and dissolved at 25 °C for 20 min to obtain the second mixture.
[0051] 5) Step 5: Add the second mixture dropwise (1 drop / second) to the first mixture, and react for 24 hours in an ice-water bath (0°C).
[0052] 6) Step 6: Pour the crude product into 150 mL of distilled water to produce a precipitate, and then use a Buchner funnel to vacuum filter the mixture. And the product was washed with distilled water and ethano...
Embodiment 3
[0055] A kind of preparation method of modified polyaniline anticorrosion coating, concrete steps are:
[0056] 1) Step 1: Same as Example 1.
[0057] 2) Step 2: Same as Example 1.
[0058] 3) Step 3: Add 2.1214 g of 1,1′-ferrocenylaniline monomer and 0.7450 g of aniline to a mixture of 20 mL of dimethylformamide and 50 mL of 1 mol / L acetic acid aqueous solution, and stir to dissolve for 30 min , to obtain the first mixture.
[0059] 4) Step 4: 2.0538 g of ammonium persulfate was dissolved in 10 mL of 1 mol / L acetic acid aqueous solution, stirred and dissolved at 25 °C for 20 min to obtain the second mixture.
[0060] 5) Step 5: Add the second mixture dropwise (1 drop / second) to the first mixture, and react for 24 hours in an ice-water bath (0°C).
[0061] 6) Step 6: Pour the crude product into 150 mL of distilled water to produce a precipitate, and then use a Buchner funnel to vacuum filter the mixture. And the product was washed with distilled water and ethanol several t...
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