Crosslinked Polyethyleneimine Dithiocarbamate Adsorbent Material
A polyethyleneimine-based dithioamino and polyethyleneimine technology, which is applied in the field of designing and preparing cross-linked polyethyleneimine-based dithiocarbamate adsorption materials, can solve the problem of unstable chemical properties, Problems such as easy hydrolysis
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Embodiment 1
[0011] Synthesis process of cross-linked polyethyleneimine dithiocarbamate adsorption material: Weigh 1.5 grams of 50% aqueous solution of polyethyleneimine (molecular weight 7000) into a 100ml round bottom flask, add 15ml of absolute ethanol , put it in a preheated oil bath at 60°C and stir, dissolve evenly, add 0.25 g of glutaraldehyde 50% aqueous solution, and continue the reaction for 2 to 3 hours. During this period, a total of 0.23 g of reducing agent sodium borohydride was added several times. Then, the reaction was lowered to room temperature, 0.46g of carbon disulfide was added, and the obtained product was transferred to an Erlenmeyer flask, placed in an ultrasonic wave for 30 minutes, then transferred to a Buchner funnel for suction filtration, and washed 3 times with 95% ethanol. Finally, the obtained modified polymer was dried in an oven at 60° C. for 24 hours to obtain 1.87 g of cross-linked polyethyleneimine dithiocarbamate adsorption material.
[0012] The pro...
Embodiment 2
[0014] Synthetic process of cross-linked polyethyleneimine dithiocarbamate adsorption material: Weigh 2.0 g of 50% aqueous solution of polyethyleneimine (molecular weight 20,000) into a 100 ml round bottom flask, add 15 ml of absolute ethanol, Stir in a preheated oil bath at 60°C, dissolve evenly, add 0.10 g of glutaraldehyde 50% aqueous solution, and continue the reaction for 2 to 3 hours. During this period, a total of 0.15 g of reducing agent sodium borohydride was added several times. Then, the reaction was lowered to room temperature, 0.30 g of carbon disulfide was added, and the obtained product was transferred to a conical flask, placed in an ultrasonic wave for 30 minutes, then transferred to a Buchner funnel for suction filtration, and washed 3 times with 95% ethanol. Finally, the obtained modified polymer was dried in an oven at 60° C. for 24 hours to obtain 1.96 g of cross-linked polyethyleneimine dithiocarbamate adsorption material.
[0015] The process of adsorbi...
Embodiment 3
[0017] Synthesis process of cross-linked polyethyleneimine dithiocarbamate adsorption material: Weigh 1.5 grams of 50% aqueous solution of polyethyleneimine (molecular weight 1000) into a 100ml round bottom flask, add 15ml of absolute ethanol , put it in a preheated oil bath at 60°C and stir, dissolve evenly, add 15.0 g of glutaraldehyde 50% aqueous solution, and continue the reaction for 2 to 3 hours. During this period, a total of 0.86 g of reducing agent sodium borohydride was added several times. Then, the reaction was lowered to room temperature, 1.5 g of carbon disulfide was added, and the obtained product was transferred to an Erlenmeyer flask, placed in an ultrasonic wave for 30 minutes, then transferred to a Buchner funnel for suction filtration, and washed 3 times with 95% ethanol. Finally, the obtained modified polymer was dried in an oven at 60° C. for 24 hours to obtain 1.60 g of cross-linked polyethyleneimine dithiocarbamate adsorption material.
[0018] The pro...
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