Nano-hydroxyapatite/polydopamine wet-adhesive hemostatic powder for external use and preparation method thereof
A technology of nano-hydroxyapatite and polydopamine, which is applied in the field of biomedical hemostatic materials to achieve high repeatability, superior biocompatibility, and easy to use
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Embodiment 1
[0029] In 100mL of disodium hydrogen phosphate-sodium dihydrogen phosphate buffer solution or disodium hydrogen phosphate-dipotassium hydrogen phosphate buffer solution with pH=7.5, add 0.50g nano-hydroxyapatite and 0.01g dopamine, ultrasonic for 15min, and react at room temperature for 12h ; The product was freeze-dried for 6 hours, and the HAP / PDA nano-network composite material was obtained. Depend on figure 1 (a) (50:1) HAP / PDA TEM images and figure 1 (b) The XRD pattern of (50:1) HAP / PDA shows that the HAP / PDA nanoacicular composite material was prepared.
Embodiment 2
[0031] In 100mL tris(hydroxymethyl)aminomethane-hydrochloric acid buffer solution or boric acid-borax buffer solution with pH=8.5, add 1.00g nano-hydroxyapatite and 0.05g dopamine, sonicate for 15min, react at room temperature for 24h; freeze-dry the product for 12h , to prepare the HAP / PDA nano-needle composite material. Depend on figure 1 (a) TEM images of (20:1) HAP / PDA and figure 1 (b) The XRD pattern of (20:1) HAP / PDA shows that the HAP / PDA nanoacicular composite material was prepared.
Embodiment 3
[0033] Add 2.00 g of nano-hydroxyapatite and 0.20 g of dopamine to 100 mL of sodium carbonate-sodium bicarbonate buffer solution or sodium barbital-hydrochloric acid buffer solution with pH=9.5, sonicate for 15 min, and react at room temperature for 36 h; the product is freeze-dried for 24 h, The HAP / PDA nano-needle composite material was prepared. Depend on figure 1 (a) (10:1) HAP / PDA TEM images and figure 1 (c) The XRD pattern of (10:1) HAP / PDA shows that the HAP / PDA nanoacicular composite material was prepared.
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