Gradient degradation skin filler and preparation method thereof
A dermal filler and gradient technology, which is applied in the field of gradient degradable dermal fillers and their preparation, can solve the problems of inability to achieve filling effects, slow degradation of fillers and ease of operation, and high hardness of products, so as to prevent immunity Risk of origin and risk of endotoxin, no risk of allergy, effect of excellent rheological properties
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Embodiment 1
[0046] This embodiment provides a preparation method of a gradient degradable dermal filler, comprising the following steps:
[0047] 1. Preparation of gel phase:
[0048] 1.1 Sodium polyglutamate is prepared into a sodium polyglutamate solution with a concentration of 25%, and carbodiimide with a concentration of 1% is added to the sodium polyglutamate solution, and then the solution is placed at room temperature for cross-linking 24 hours, after the cross-linking is completed, dialyze the gel block for 24 hours to remove the cross-linking agent. The diameter range is between 25-200μm;
[0049] 1.2 Prepare a sodium polyglutamate solution with a concentration of 8%, add 0.2% carbodiimide at 2-8°C, and add the above-mentioned primary cross-linked sodium polyglutamate gel particles to the 8% sodium polyglutamate solution , stir to make the carbodiimide and sodium polyglutamate solution evenly adhere to the primary cross-linked sodium polyglutamate gel particles, then separate,...
Embodiment 2
[0055] This embodiment provides a preparation method of a gradient degradable dermal filler, comprising the following steps:
[0056] 1. Preparation of gel phase:
[0057] 1.1 Prepare sodium alginate into a sodium alginate solution with a concentration of 10%, add polyethylene glycol diglycidyl ether with a final concentration of 8% to the sodium alginate solution, and then place the solution at 60°C for cross-linking After 2.5 hours, after the cross-linking is completed, the gel block is broken into 0.3-0.5mm particles, boiled in water for 10 minutes, and repeated 3 times after changing the water, and the obtained gel is screened to obtain a cross-linked sodium alginate gel. Colloidal particles, so that the particle size range is between 25-200 μm;
[0058] 1.2 Prepare a sodium alginate solution with a concentration of 2%, add 0.6% polyethylene glycol diglycidyl ether at 2-8°C, add the above-mentioned primary cross-linked sodium alginate gel particles into the 2% sodium algi...
Embodiment 3
[0064] This embodiment provides a preparation method of a gradient degradable dermal filler, comprising the following steps:
[0065] 1. Preparation of gel phase:
[0066] 1.1 Sodium carboxymethyl cellulose is formulated into a sodium carboxymethyl cellulose solution with a concentration of 5%, and epichlorohydrin with a final concentration of 2% is added to the sodium carboxymethyl cellulose solution, and then the solution is placed at 50 Cross-linking at ℃ for 6 hours. After cross-linking, wash the gel blocks alternately with absolute ethanol / water for 30 minutes each time. One hour is a cleaning cycle. Washing for 4 cycles, the resulting gel is placed in A vacuum drying oven volatilizes the absolute ethanol therein, and passes through a sieve to obtain primary croscarmellose sodium gel particles, so that the particle size range is between 25-200 μm;
[0067] 1.2 Separately prepare a 1% sodium carboxymethylcellulose solution, add 0.8% epichlorohydrin at 2-8°C, add 1% carbox...
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