A kind of preparation method of waterborne antibacterial coating
An antibacterial coating, water-based technology, applied in the field of preparation of water-based antibacterial coatings, can solve problems such as poor dispersion, achieve the effect of enhanced coating performance, excellent thermal stability, and enhanced antibacterial performance
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Embodiment 1
[0022] 1. Preparation of microcapsule antibacterial filler.
[0023] a. Weigh 10 parts of nano-titanium dioxide, 15 parts of medical stone powder (particle size 80-100 mesh), measure 150 parts of NaOH solution with a mass fraction of 5%, mix the three, and stir the solution slowly (150r / min ) for 1 h; ultrasonically disperse the solution at room temperature for 5 h, disperse evenly and dry naturally for 5 h, then put it in a drying oven (50 ° C) for 5 h, and then put it in a muffle furnace (550 ° C) for 3 h to obtain nano-titanium dioxide- Medical stone composite particles.
[0024] b. Add 20 parts of 2-chloropyridine, 1 part of maleic anhydride, 5 parts of 50% H 2 o 2 and 50 parts of ethyl acetate, then stirred (300r / min) for 1 hour to fully dissolve; then the temperature was raised to 80°C, and 10 parts of 50% H 2 o 2 Solution, 15min dropwise, react for 6h, then add NaOH solution dropwise to the system to make the pH value of the system 11; then cool down to 50°C, in N ...
Embodiment 2
[0029] a. Weigh 5 parts of nano-titanium dioxide, 12 parts of medical stone powder (particle size 60-80 mesh), measure 120 parts of NaOH solution with a mass fraction of 3%, mix the three, and stir slowly (100r / min) 0.5h; ultrasonically disperse the solution at room temperature for 2.5h, disperse evenly and dry naturally for 3h; then put it in a drying oven (70°C) for 6h, and then put it in a muffle furnace (600°C) for 2h to obtain nano-titanium dioxide - Medical stone composite particles.
[0030] b. Add 10 parts of 2-chloropyridine, 1.5 parts of maleic anhydride, 3 parts of 50% H 2 o 2 and 45 parts of ethyl acetate, then stirred (200r / min) for 0.5h to fully dissolve; then the temperature was raised to 65°C, and 7 parts of 50% H 2 o 2 Solution, after 15min dropwise addition, react for 5h; add NaOH solution dropwise to the system, adjust the pH value of the system to 9; then cool down to 52°C, 2 Under the condition of protection, drop 80 parts of NaSH-Na through the consta...
Embodiment 3
[0035] a. Weigh 8 parts of nano-titanium dioxide, 10 parts of medical stone powder (particle size 60-100 mesh), measure 100 parts of NaOH solution with a mass fraction of 2%, mix the three, and stir slowly (120r / min) 0.8h; ultrasonically disperse the solution at room temperature for 2h, disperse evenly and dry naturally for 4h; then put it in a drying oven (85°C) for 5h, and then put it in a muffle furnace (600°C) for 2.5h to obtain nano-titanium dioxide - Medical stone composite particles.
[0036] b. Add 15 parts of 2-chloropyridine, 1.2 parts of maleic anhydride, 4 parts of 50% H 2 o 2 and 40 parts of ethyl acetate, then stirred (260r / min) for 0.8h to fully dissolve; then the temperature was raised to 70°C, and 8 parts of 50% H 2 o 2 Solution, 15min dropwise addition, reaction 4h; Add NaOH solution dropwise to the system, adjust the pH value of the system to 9.5; Then cool down to 55 ° C, in N 2 Under the condition of protection, drop 90 parts of NaSH-Na through the con...
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