Magnetic airgel based on diamide oxime cellulose/sodium alginate and its preparation and application
A sodium alginate and cellulose technology, applied in other chemical processes, water/sewage treatment, chemical instruments and methods, etc., can solve the problems of rare airgel, achieve regular organization structure, avoid agglomeration, and simple operation Effect
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Embodiment 1
[0033] Weigh 5g microcrystalline cellulose, place in 200mL NaOH solution with a concentration of 1.25wt%, boil for 90min; Alkalized microcrystalline cellulose. Take 2g of alkalized microcrystalline cellulose and place it in 45mL of acetone, condense and reflux at 60°C for 30min under the protection of nitrogen, add 2g of 2-cyano-3-ethoxyethyl acrylate to react for 10min, then add 0.01g of cerium ammonium nitrate The reaction was continued for 4 hours, and the product was filtered, washed with methanol, washed with water, and dried to obtain graft-copolymerized microcrystalline cellulose. Add it to 1mol / L hydroxylamine solution at a bath ratio of 1:30, react at 65°C for 3 hours, and wash the product with methanol, water, and dry in sequence to obtain diamide oxime microcrystalline cellulose.
[0034] Weigh 2g of diamide oxime microcrystalline cellulose and add it to 50mL of ferric chloride aqueous solution with a concentration of 0.1mol / L, place it in an ultrasonic cell pulver...
Embodiment 2
[0037]Weigh 4g of nanocellulose, place it in 100mL NaOH solution with a concentration of 3wt%, boil for 60min; then transfer to 200mL NaOH solution with a concentration of 15wt%, stir at room temperature for 45min; Nanocellulose. Take 2g of alkalized nanocellulose in 50mL of acetone, condense and reflux at 50°C for 15min under the protection of nitrogen, add 1g of monomer 2-cyano-3-ethoxy ethyl acrylate for 10min, then add 0.01g of cerium ammonium nitrate to continue After reacting for 1 hour, the product was filtered, washed with methanol, deionized water, and dried to obtain graft-copolymerized nanocellulose. Add it to 1 mol / L hydroxylamine solution at a bath ratio of 1:15, react at 70°C for 4 hours, wash the product with methanol and deionized water in sequence, and dry to obtain bisamide oxime nanocellulose material.
[0038] Weigh 5g of diamide oxime nanocellulose and add it to 500mL of ferric nitrate aqueous solution with a concentration of 0.05mol / L, place in an ultras...
Embodiment 3
[0041] Weigh 3g microcrystalline cellulose, place in 100mL NaOH solution with a concentration of 2wt%, boil for 120min; then transfer to 150mL NaOH solution with a concentration of 10wt%, stir at room temperature for 120min; microcrystalline cellulose. Take 2g of alkalized microcrystalline cellulose and place it in 75mL of acetone, condense and reflux at 50°C for 45min under the protection of nitrogen; add 6g of monomer 2-cyano-3-ethoxyethyl acrylate for 45min, then add 0.01g of cerium ammonium nitrate After reacting for 8 hours, the product was filtered and washed with methanol, deionized water and dried to obtain graft copolymerized nanocellulose. It was placed in 1 mol / L hydroxylamine solution at a bath ratio of 1:45, and reacted at 70°C for 6 hours, and the product was washed with methanol, deionized water, and dried in sequence to obtain the diamide oxime nanocellulose material.
[0042] Weigh 0.5g of diamide oxime microcrystalline cellulose and add it to 50mL of ferric ...
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