Preparation of plural gel water absorbent material composed of silk fibroin/acrylic acid/acrylamide
A technology of silk fibroin and acrylamide, which is applied in the field of preparation of silk fibroin/acrylic acid/acrylamide composite gel water-absorbing materials, which can solve the problems of easily polluted environment, material sources, preparation and processing costs, insufficient influence of soil structure, and not easy to degrade and other issues to achieve the effect of reducing environmental pollution
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[0022] Preparation of silk fibroin solution:
[0023] The cleaned silkworm waste cocoons were subjected to Na 2 CO 3 After boiling water degumming, use 50% CaCl by weight 2 The solution was dissolved at 98°C, filtered, dialyzed, and concentrated to obtain an SF solution with a concentration of 8%, which was set aside.
Embodiment 1
[0025] (1) Weigh 2.65g of analytically pure AA solution into a beaker, and add 1.03g of 10% (w / w) NaOH solution dropwise at room temperature of 20-30°C to make the neutralization degree of AA reach 70%; then add 1.35 g of analytically pure AM solid was stirred to obtain a mixed solution of monomer (AA / AM).
[0026] (2) Add 2g of SF into a reactor containing 25ml of distilled water, place it on a constant temperature magnetic stirrer for heating in a water bath (70°C); then add 0.072g of ammonium persulfate (APS for short), and then add monomer (AA / AM) mixed solution and 0.006g N,N'-dimethylbisacrylamide (abbreviated as MBA).
[0027] (3) Control the temperature of the water bath to 70°C, and stir while heating. When the reactant becomes gel and becomes viscous and difficult to stir, stop stirring, and then stand still. The total reaction time of stirring and standing is 2 hours.
[0028] (4) The prepared gel was taken out and washed with deionized water to obtain a hydrogel-l...
Embodiment 2
[0037] (1) Weigh 2.65g of AA solution into a beaker, and add 1.177g of 10% (w / w) NaOH solution dropwise at room temperature of 20-30°C to make the neutralization degree of AA reach 80%; then add 1.35g AM solid, after stirring, a mixed solution of monomer (AA / AM) was obtained.
[0038] (2) Add 2g of SF into a reactor containing 25ml of distilled water, place it on a constant temperature magnetic stirrer for heating in a water bath (80°C); then add 0.1g of ammonium persulfate (APS for short), and then add monomer (AA / AM) mixed solution and 0.012g N,N'-dimethylbisacrylamide (abbreviated as MBA).
[0039] (3) Control the temperature of the water bath to 80°C, and stir while heating. When the reactant becomes gel and becomes viscous and difficult to stir, stop stirring, and then stand still. The total reaction time of stirring and standing is 2 hours.
[0040] (4) The prepared gel was taken out and washed with deionized water to obtain a hydrogel-like composite water-absorbing mat...
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