Magnetic porous cationic polymer adsorbent and preparation method thereof
A cationic and macromolecular technology, applied in the field of magnetic porous cationic macromolecular adhesive and its preparation, can solve the problems of poor adsorption effect, poor applicability, large dosage, etc., and achieve the effects of simple process, simplified time-consuming, and low-solvent preparation.
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[0016] Example 1:
[0017] (1) Disperse 0.2 g of ferrous chloride tetrahydrate and 0.8 g of ferric chloride hexahydrate in 30 mL of deionized water, and mix well with ultrasound;
[0018] (2) Add the mixed solution obtained in step (1) dropwise to 50 mL of acetic acid solution in which 0.5 g of chitosan and 0.1 g of polyethyleneimine are dissolved, and emulsify for 15 min with a homogenizer;
[0019] (3) Transfer the mixture obtained in step (2) to a three-necked flask, add nitrogen and heat to 40°C, add 3 mL of ammonia, react for 0.5 h, then add 0.1 g of polyethyleneimine, and emulsify with a homogenizer 10 min;
[0020] (4) Add 0.1 mL of epichlorohydrin to the mixture obtained in step (3) for cross-linking reaction for 0.5 hours; terminate the reaction with cold water, and adjust the pH to neutral with 1 mol / L hydrochloric acid solution, and the product is separated by an external magnetic field and then frozen After drying, the magnetic porous cationic polymer adsorbent is obtaine...
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[0022] Example 2:
[0023] (1) Disperse 0.5 g of ferrous chloride tetrahydrate and 2.5 g of ferric chloride hexahydrate in 30 mL of deionized water, and mix well with ultrasound;
[0024] (2) Add the mixed solution obtained in step (1) dropwise to 50 mL of acetic acid solution in which 1.0 g of chitosan and 0.3 g of polyethyleneimine are dissolved, and emulsify with a homogenizer for 15 minutes;
[0025] (3) Transfer the mixture obtained in step (2) to a three-necked flask, pour into nitrogen and heat to 80°C, add 5.0 mL of ammonia, react for 1.5 h, then add 0.8 g of polyethyleneimine, and emulsify with a homogenizer 10 min;
[0026] (4) Add 0.4 mL of epichlorohydrin to the mixture obtained in step (3) for cross-linking reaction for 1.0 hour; terminate the reaction with cold water, and adjust the pH to neutral with 1 mol / L hydrochloric acid solution, and the product is separated by an external magnetic field and then frozen After drying, the magnetic porous cationic polymer adsorbent...
Example Embodiment
[0028] Example 3:
[0029] (1) Disperse 1.0 g of ferrous chloride tetrahydrate and 2.5 g of ferric chloride hexahydrate in 30 mL of deionized water, and mix well with ultrasound;
[0030] (2) Add the mixed solution obtained in step (1) dropwise to 50 mL of acetic acid solution in which 1.2 g of chitosan and 1.0 g of polyethyleneimine are dissolved, and emulsify for 15 min with a homogenizer.
[0031] (3) Transfer the mixture obtained in step (2) to a three-necked flask, add nitrogen and heat to 90°C, add 11.0 mL of ammonia, react for 1.0 h, then add 2.0 g of polyethyleneimine, and emulsify with a homogenizer 10 min;
[0032] (4) Add 1.0 mL of epichlorohydrin to the mixture obtained in step (3) for cross-linking reaction for 2.0 hours; terminate the reaction with cold water, and adjust the pH to neutral with 1 mol / L hydrochloric acid solution, and the product is separated by an external magnetic field and then frozen After drying, the magnetic porous cationic polymer adsorbent is obta...
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