A kind of pH responsive oil-water separation foam and preparation method thereof
An oil-water separation and responsive technology, applied in the field of porous foam materials, can solve the problems of energy consumption, secondary pollution, difficult recovery of high-boiling heavy oil, etc., and achieve the effect of simple preparation method and low cost
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Embodiment 1
[0032] (1) Put 16 mg of melamine foam in 20 mL of toluene solution containing 200 µL of 3-aminopropyltrimethoxysilane, reflux at 115 °C for 1 hour, wash with toluene repeatedly three times, and dry in a nitrogen atmosphere;
[0033] (2) The obtained foam was placed in 15mL of anhydrous dichloromethane (containing 3.0wt% anhydrous pyridine), and at 0°C, 86 µL of 2-bromoisobutyryl bromide initiator was added dropwise, and the addition was completed Then continue to react in an ice-water bath for 1 hour, and then place it in room temperature to react for 12 hours; take out the foam, wash it repeatedly with dichloromethane and acetone for 5 times, and dry it in a nitrogen atmosphere;
[0034] (3) Under a nitrogen atmosphere, place the foam in a solution of 5mL butanone and isopropanol (the volume ratio of butanone:isopropanol is 1:1) containing 0.32g monomer 4-vinylpyridine, and add 15mg of catalyst CuBr and complexing agent 60mg pentamethyldivinyltriamine were reacted at 50°C for...
Embodiment 2
[0037] (1) Put 16mg of melamine foam in 20mL toluene solution containing 450µL 3-aminopropyltrimethoxysilane, reflux at 115°C for 6h, wash with toluene solvent repeatedly three times, and dry in nitrogen atmosphere;
[0038] (2) The obtained foam was placed in anhydrous 15mL dichloromethane (containing 3.0wt% anhydrous pyridine), and at 0°C, 17µL 2-bromoisobutyryl bromide initiator was added dropwise. Continue to react in an ice-water bath for 1 h, then place at room temperature for 12 h; take out the foam, wash it repeatedly with dichloromethane and acetone for 5 times, and dry it in a nitrogen atmosphere;
[0039] (3) Under a nitrogen atmosphere, place the foam in 10 mL of butanone and isopropanol (butanone: isopropanol volume ratio: 1:1) solution containing 0.16 g of monomer 4-vinylpyridine, and add 6 mg of catalyst CuBr and complexing agent 48mg pentamethyldivinyltriamine were reacted at 40°C for 20h, the product was taken out, washed with deionized water, and dried under ...
Embodiment 3
[0042] (1) Put 16 mg of melamine foam in 20 mL of toluene solution containing 900 µL of 3-aminopropyltrimethoxysilane, reflux at 115 °C for 4 hours, wash with toluene solvent repeatedly three times, and dry in a nitrogen atmosphere;
[0043] (2) The obtained foam was placed in anhydrous 15mL dichloromethane (containing 3.0wt% anhydrous pyridine), and at 0°C, 172µL 2-bromoisobutyryl bromide initiator was added dropwise. Continue to react in an ice-water bath for 1 h, then place at room temperature for 12 h; take out the foam, wash it repeatedly with dichloromethane and acetone for 5 times, and dry it in a nitrogen atmosphere;
[0044] (3) Under a nitrogen atmosphere, place the foam in 10 mL of butanone and isopropanol (butanone: isopropanol volume ratio: 1:1) solution containing 0.32 g of monomer 4-vinylpyridine, and add 19 mg of catalyst CuBr and complexing agent 80mg pentamethyldivinyltriamine were reacted at 50°C for 10h, and the product was taken out, washed with deionized ...
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