A kind of multi-purpose photonic cryogel and preparation method thereof
A technology of cold gel and photon, which is applied in the fields of medical cosmetology and biomedicine, can solve the problems of low light transmittance of photon cold gel, damaged probe, insufficient moisturizing type, etc., and achieves easy preparation method, non-irritating, good The effect of light transmittance
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Embodiment 1
[0051] Add 6L of polyglycolide (intrinsic viscosity: 0.4dl / g) dichloromethane solution with a mass concentration of 2% to 20L of polyvinyl alcohol 1788 (low viscosity type) aqueous solution with a mass concentration of 0.2%, and stir for 3 hours. The stirring speed is 350rpm, and the mixture in the reactor is released. Suction filtration, vacuum drying, ready for filling.
[0052] Mix 0.1 part of carbomer, 1 part of polyethylene glycol and 1 part of glycerin, stir evenly, add 50 parts of water for injection, stir, after completely swelling, add 0.5 part of ethyl p-hydroxybenzoate, 0.1 part of triethanolamine, and then Add the remaining water for injection, continue to stir for 1 hour, add 5 parts of PLGA microspheres, continue to stir for 2 hours, and obtain.
Embodiment 2
[0054] Add 10L of 5% polyvinyl alcohol (intrinsic viscosity: 1.0dl / g) chloroform solution to 10L of polyvinyl alcohol 1788 (low viscosity type) aqueous solution with a mass concentration of 0.5%, and stir for 8 hours at a stirring speed of 500rpm , release the mixture in the reactor. Suction filtration, vacuum drying, ready for filling.
[0055] Mix 5 parts of carbomer, 10 parts of polyethylene glycol and 5 parts of mannitol, stir evenly, add 50 parts of water for injection, stir, after swelling completely, add the remaining water for injection, adjust with hydrochloric acid solution or sodium hydroxide solution When the pH reaches 6.8, after stirring for 1 hour, add 15 parts of PLGA microspheres and continue stirring for 2 hours to obtain the product.
Embodiment 3
[0057] Add 15L of polyethylene lactide (intrinsic viscosity: 2.0dl / g) ethyl acetate solution with a mass concentration of 10% to 20L of polyvinyl alcohol 1788 (low viscosity type) aqueous solution with a mass concentration of 1.0%, and stir for 15 hours. The stirring speed is 650rpm, and the mixture in the reaction kettle is released; it is filtered, vacuum-dried, and prepared for filling.
[0058] Mix 1.5 parts of carbomer, 5 parts of polyethylene glycol and 5 parts of glycerin, stir evenly, add 50 parts of water for injection, stir, after completely swelling, add 0.3 parts of ethyl p-hydroxybenzoate, 0.5 parts of triethanolamine, and then Add the remaining water for injection, continue to stir for 1 hour, then add 30 parts of PLGA microspheres, continue to stir for 2 hours to obtain the product.
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