Preparation of composite 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 water-absorbing materials, which can solve the problems of easy pollution of the environment, less development, material sources, insufficient influence of soil structure on preparation and processing costs, etc. , to achieve the effect of reducing environmental pollution
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[0021] Preparation of silk fibroin solution:
[0022] 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
[0024] (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).
[0025] (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 0.08g of ammonium persulfate (APS for short), and then add monomer (AA / AM) Mixed solution and 0.01g N,N'-dimethylbisacrylamide (abbreviated as MBA).
[0026] (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.
[0027] (4) Take out the prepared gel, first wash it with deionized water, and then soak it with an...
Embodiment 2
[0035] (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 (mole) of AA reach 70% ; Then add 1.35g of analytically pure AM solid, and stir to obtain a mixed solution of monomer (AA / AM). The concentration of analytical purity is 99.9%.
[0036] (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 (60°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).
[0037] (3) Control the temperature of the water bath to 60°C, stir while heating, stop stirring when the reactant becomes gel and becomes viscous to the point that stirring is difficult, then let stand for reaction, stir and stand still for 2 hours.
[0038] (4) Take out the prepared gel, first wash...
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