A kind of preparation method of silicon dioxide medical dressing based on aerosol deposition
A silicon dioxide medical and aerosol deposition technology, which is applied in the fields of pharmaceutical formula, medical science, absorbent pads, etc., can solve the problems of destroying the microstructure of fibers and affecting the mechanical properties of medical dressing materials, so as to improve the specific surface area and excellent Excellent effect of hemostatic performance, air permeability and mechanical properties
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Embodiment 1
[0024] (1) Add tetraethyl orthosilicate to a solution containing 3% triblock copolymer P123 and 1.5mol / L hydrochloric acid, first heat and stir at 45°C for 1h, then cool down to 30°C to age and dry, transfer In a high-temperature carbonization furnace, first raise the temperature to 400°C for 10 minutes, then raise the temperature to 600°C for 4 hours, and grind it into powder to obtain mesoporous silica microspheres with a particle size of 200-350nm and a pore size of 10-30nm.
[0025] (2) According to the mass ratio of mesoporous silica microspheres and nano-silica sol is 1:3, add mesoporous silica microspheres into the nano-silica sol with a particle size of 50-200nm, and mix well , add distilled water, mix evenly, and perform ultrasonic cell crushing treatment at 1500W for 10 minutes to obtain a silicon dioxide-containing atomization pre-liquid, wherein the silicon dioxide-containing aerosol precursor in the silicon dioxide-containing atomization pre-liquid The content of ...
Embodiment 2
[0028] (1) Add tetraethyl orthosilicate to a solution containing 4% triblock copolymer P123 and 2mol / L hydrochloric acid, first heat and stir at 50°C for 2h, then cool down to 35°C to age and dry, and transfer to In a high-temperature carbonization furnace, first raise the temperature to 450°C for 30 minutes, then raise the temperature to 600°C for 6 hours, and grind it into powder to obtain mesoporous silica microspheres with a particle size of 350-500nm and a pore size of 30-50nm.
[0029] (2) According to the mass ratio of mesoporous silica microspheres and nano-silica sol is 1:5, add mesoporous silica microspheres into the nano-silica sol with a particle size of 50-200nm, and mix well , add distilled water, after mixing evenly, ultrasonically crush the cells at 1800W for 20 minutes to obtain a silicon dioxide-containing atomization pre-liquid, wherein the silicon dioxide-containing aerosol precursor in the silicon dioxide-containing atomization pre-liquid The content of si...
Embodiment 3
[0032](1) Add tetraethyl orthosilicate to a solution containing 3.5% triblock copolymer P123 and 1.6mol / L hydrochloric acid, first heat and stir at 48°C for 1.3h, then cool down to 32°C to age and dry, Transfer to a high-temperature carbonization furnace, first raise the temperature to 420°C for 15 minutes, then raise the temperature to 600°C for 5 hours, and grind it into powder to obtain mesoporous silica microspheres with a particle size of 250-350nm and a pore size of 20-35nm.
[0033] (2) According to the mass ratio of mesoporous silica microspheres and nano-silica sol is 1:4.5, add mesoporous silica microspheres into the nano-silica sol with a particle size of 50-200nm, and mix well , add distilled water, mix evenly, and perform ultrasonic cell crushing treatment at 1700W for 13 minutes to obtain a silicon dioxide-containing atomization pre-liquid, wherein the silicon dioxide-containing aerosol precursor in the silicon dioxide-containing atomization pre-liquid The conten...
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