Preparation method and product of ultrathin high strength hydrogel membrane
A high-strength, hydrogel technology, which is applied in the field of preparation of hydrogel films, can solve the problems of complex preparation process and inability to reuse hydrogel films, and achieve the effect of simple preparation method, low cost and easy synthesis
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Embodiment 1
[0053] Take a random copolymer hydrogel film containing 10% stearyl acrylate as an example:
[0054] (1) Prepare an ethanol solution containing 2.7 mol / L acrylic acid monomer, 0.3 mol / L stearyl acrylate (SA) and 0.03 mol / L azobisisobutyronitrile (the total monomer concentration is 3 mol / L). Azobisisobutyronitrile (AIBN) was used as a thermal initiator, and the polymerization reaction was carried out in the absence of oxygen at 60°C for 10 hours to obtain a transparent and viscous ethanol solution of acrylic acid-octadecyl acrylate random copolymer.
[0055] (2) Configure ethanol / water mixed solvent containing 5% volume content in a watch glass as film-forming liquid, draw acrylic acid-stearyl acrylate random copolymer ethanol solution and drop 3 drops into ethanol / water mixed solvent with a dropper middle. The random copolymer solution spread rapidly on the surface of ethanol / water mixed solvent, and formed a physical hydrogel film after solvent exchange.
[0056] (3) The hy...
Embodiment 2
[0061] Take a random copolymer hydrogel film containing 5% stearyl acrylate as an example:
[0062] (1) Prepare an ethanol solution containing 2.85 mol / L acrylic acid monomer, 0.15 mol / L octadecyl acrylate and 0.03 mol / L azobisisobutyronitrile (the total monomer concentration is 3 mol / L). AIBN was used as a thermal initiator, and the polymerization reaction was carried out in the absence of oxygen at 60°C for 10 hours to obtain a transparent and viscous ethanol solution of acrylic acid-stearyl acrylate random copolymer.
[0063] (2) Configure ethanol / water mixed solvent containing 2% volume content in a watch glass as a film-forming liquid, use a dropper to draw acrylic acid-stearyl acrylate random copolymer ethanol solution and drop 3 drops into the ethanol / water mixed solvent middle. The random copolymer solution spread rapidly on the surface of ethanol / water mixed solvent, and formed a physical hydrogel film after solvent exchange.
[0064] The hydrogel film prepared in t...
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