A kind of network ion imprinted polymer, its preparation method and application
An ion imprinting and polymer technology, applied in chemical instruments and methods, water pollutants, and other chemical processes, can solve problems such as poor water solubility, single active group, poor template ion selective recognition ability, etc., and achieve simple preparation , low cost, good water phase compatibility
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[0036] A network ion imprinted polymer provided by the invention, its preparation method comprises the following steps:
[0037] (1) Preparation of 8-hydroxyquinoline grafted gelatin polypeptide
[0038] 1.1) Dissolve analytically pure gelatin made from pigskin in 0.01-0.1 mol / L sodium hydroxide solution until the gelatin is completely dissolved, wherein the gelatin concentration is 10-50 mg / mL, preferably 30 mg / mL , reacting at 70-100°C for 0.5-4 hours, hydrolyzing the gelatin protein into a small-molecule polypeptide mixture, and then adjusting the pH value of the solution to 7.0 with hydrochloric acid of the same concentration as sodium hydroxide to obtain an aqueous gelatin polypeptide solution;
[0039] 1.2) Dissolving 8-hydroxyquinoline in an ethanol solution, and then adding the gelatin polypeptide aqueous solution prepared in 1.1), wherein the mass ratio of gelatin to 8-hydroxyquinoline is 1 to 5:1, preferably 2.1:1, and the ultrasonic dispersion is uniform to obtain ...
Embodiment 1
[0049] (1) Preparation of 8-hydroxyquinoline grafted gelatin polypeptide
[0050] The analytically pure gelatin processed from pigskin was dissolved in 25mL of sodium hydroxide solution (0.1mol / L), the gelatin concentration was 30mg / mL, reacted at 80°C for 2 hours to obtain the gelatin polypeptide, and then used Isoconcentrated hydrochloric acid adjusted the pH of the solution to 7.0. Dissolve 350mg of 8-hydroxyquinoline in 25mL of ethanol solution, then add it to the above-mentioned gelatin polypeptide solution, and disperse evenly by ultrasonic; then, after adding 0.25mL of acetic acid and 0.5mL of formaldehyde to the mixed solution, pour it into a round bottom connected with a condenser tube In the flask, react at 100°C for 6 hours to obtain a white precipitate; wash with ethanol and aqueous solution repeatedly to remove unreacted reagents;
[0051] (2) Preparation of network-like ion-imprinted polymers
[0052] Disperse a certain amount of lead acetate (20mg), chitosan (...
Embodiment 2
[0056] (1) Preparation of 8-hydroxyquinoline grafted gelatin polypeptide
[0057] 150 mg of analytically pure gelatin processed from pigskin was dissolved in 15 mL of sodium hydroxide solution (0.01 mol / L), the gelatin concentration was 10 mg / mL, and reacted at 70 ° C for 0.5 hours to obtain gelatin polypeptides, and then The pH of the solution was adjusted to 7.0 with isocratic hydrochloric acid. Dissolve 150mg of 8-hydroxyquinoline in 25mL of ethanol solution, then add the above gelatin polypeptide aqueous solution, and disperse evenly by ultrasonic; then, after adding 0.04mL of acetic acid and 0.8mL of formaldehyde to the mixed solution, pour it into a round bottom flask connected with a condenser tube In the reaction at 80°C for 4 hours, a white precipitate was obtained; washed repeatedly with ethanol and aqueous solution to remove unreacted reagents;
[0058] (2) Preparation of network-like ion-imprinted polymers
[0059] Disperse a certain amount of lead acetate (20mg)...
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