Porous polyurethane composite film and application thereof
A polyurethane and composite film technology, which is applied in the fields of surgery, coating, medical science, etc., can solve the problems of large-scale industrial production difficulties, harsh conditions, and complicated preparation methods, so as to prevent material corrosion, improve modification processing, Simple operation effect
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Embodiment 1
[0050] Under nitrogen protection, under high-speed stirring, 5 g of γ-aminopropyltriethoxysilane and 5 g of nano-silver were added to 200 g of acetone, respectively, and stirred for 30 min.
[0051] Preparation of polyurethane emulsion: Weigh 60.00g of polytetramethylene glycol (molecular weight 2000) in the reactor, add 5.30g of hexamethylene diisocyanate and 200ml of tetrahydrofuran solvent into the reactor, add mechanical stirring under nitrogen protection for 30min, add 1g Dibutyltin dilaurate, heated to 90 ° C for 2 hours. Add 0.77g of 1,6-hexanediol, add 60g of the above nano-silver acetone mixture three times, and react at 80°C for 20h. The temperature is 35°C, 4.1g of calcium carbonate is added, and the stirring speed is 2000rpm for 1h. The stirring speed is 1000 rpm, and the solvent is removed under reduced pressure to obtain an antibacterial polyurethane material.
[0052] Add 10 g of antibacterial polyurethane material to 100 g of tetrahydrofuran and stir for 1 hour...
Embodiment 2
[0054] Under nitrogen protection, under high-speed stirring, 10 g of γ-(methacryloyloxy)propyltriethoxysilane was added to 200 g of acetone, 2 g of nano-silver was added, and stirred for 10 min; 4 g of nano-zinc oxide was stirred for 30 min.
[0055] Preparation of polyurethane emulsion: Weigh 50.00g polypropylene glycol (molecular weight 800) in the reactor, add 20.84g isophorone diisocyanate and 200ml tetrahydrofuran solvent into the reactor, add mechanical stirring under nitrogen protection for 30min, add 0.8g octanoic acid Sn, heated to 90 ° C for 4 hours. Add 100g of nano-silver / nano-zinc oxide-acetone mixture in four times, add 2.82g of 1,4-butanediol, and react at 80°C for 20h. The reaction temperature was lowered to 35° C., 4.1 g of calcium carbonate was added, the stirring speed was 1000 rpm, and the mixture was stirred for 2 hours. The solvent is removed under reduced pressure to obtain an antibacterial polyurethane material.
[0056] Add 10 g of antibacterial poly...
Embodiment 3
[0058] Under nitrogen protection, under high-speed stirring, 8 g of γ-(methacryloyloxy)propyltriethoxysilane was added to 200 g of acetone, 1 g of nano-silver was added, and stirred for 10 min; 2 g of nano-zinc oxide was stirred for 30 min.
[0059] Preparation of polyurethane emulsion: Weigh 30.00g of polyethylene glycol (molecular weight 1000) in the reactor, add 9.44g of dicyclohexylmethane diisocyanate and 200ml of acetone solvent into the reactor, add mechanical stirring under nitrogen protection for 30min, add 0.5 g stannous octoate, heated to 90 ° C for 2 hours. Add 0.54g of 1,4-butanediol, add 90g of nano-silver / nano-zinc oxide-acetone mixture three times, and react at 80°C for 20h. The reaction temperature was lowered to 35° C., 5 g of calcium carbonate was added, the stirring speed was 1000 rpm, and the mixture was stirred for 2 h. Acetone is removed to obtain an antibacterial polyurethane material.
[0060] Add 10 g of antibacterial polyurethane material to 300 g ...
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