Nano-silver compound hydrogel dressing patch and preparing method thereof
A composite hydrogel and composite gel technology, which is applied in medical science, absorbent pads, bandages, etc., can solve problems such as mechanical properties, insufficient swelling rate, poor moisturizing and air permeability, and residues, so as to improve physical and mechanical properties and prevent The effect of lifting the corners and improving the regenerative ability
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[0036] A kind of preparation method of nano silver composite hydrogel dressing, its concrete steps comprise:
[0037] S1: Preparation of composite gel:
[0038] Mix hydroxypropyl, hydroxybutyl chitosan, and sodium alginate according to the above mass fractions, then add sodium hydroxide solution, use oxidized sodium alginate to provide aldehyde groups for Schiff base reaction, and form chemically crosslinked Crystallization-covalent double network to obtain primary composite gel solution;
[0039] S2: mixing and stirring:
[0040] Add low-fat pectin, Chinese herbal medicine, and collagen to the composite gel solution obtained in S1 and stir;
[0041] S3: Add sodium chloride solution and keep stirring. Physically crosslinked chain entanglement-covalent double network will occur after sodium chloride solution is added to obtain a secondary composite gel solution; during the preparation process, chemical crosslinking + physical crosslinking will occur. The double network struc...
Embodiment 1
[0048] A kind of preparation method of nano silver composite hydrogel dressing, its concrete steps comprise:
[0049] S1: Preparation of composite gel:
[0050] Mix 100 parts of hydroxypropyl, 500 parts of hydroxybutyl chitosan, and 200 parts of sodium alginate according to the above mass fractions, and then add 1000 parts of sodium hydroxide solution by mass. The concentration of sodium hydroxide solution is selected. There are staff to choose according to the needs, subject to the fact that each component can fully react without wasting raw materials, the details will not be repeated, and the technical staff will set it by themselves. During the reaction, the oxidized sodium alginate is used to provide the aldehyde group of the Schiff base reaction After the reaction, a chemically cross-linked crystal-covalent double network is formed to obtain a primary composite gel solution;
[0051] S2: mixing and stirring:
[0052] Add 20 parts of low-fat pectin, 100 parts of Chinese ...
Embodiment 2
[0060] A kind of preparation method of nano silver composite hydrogel dressing, its concrete steps comprise:
[0061] S1: Preparation of composite gel:
[0062] Mix 200 parts of hydroxypropyl, 400 parts of hydroxybutyl chitosan, and 200 parts of sodium alginate according to the above mass fractions, and then add 1000 parts of sodium hydroxide solution by mass. The concentration of sodium hydroxide solution is selected. There are staff to choose according to the needs, subject to the fact that each component can fully react without wasting raw materials, the details will not be repeated, and the technical staff will set it by themselves. During the reaction, the oxidized sodium alginate is used to provide the aldehyde group of the Schiff base reaction After the reaction, a chemically cross-linked crystal-covalent double network is formed to obtain a primary composite gel solution;
[0063] S2: mixing and stirring:
[0064] Add 30 parts of low-fat pectin, 120 parts of Chinese ...
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