Polyurethane foamed material for soil heavy mental ion adsorption
A technology of polyurethane foam and heavy metal ions, which is applied in the restoration of polluted soil, alkali metal compounds, alkali metal oxides/hydroxides, etc., to achieve good application value and promotion prospects, simple molding process, and good environmental friendliness Effect
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[0020] Example 1
[0021] In a reaction vessel equipped with a stirrer and a thermometer, add 100 g of polyether polyol (hydroxyl value 56 mgKOH / g), 5.4 g of HFE-245mf, a solution obtained by dissolving 1.0 g of 8-hydroxyquinoline, 0.4 g of octylenene, 3 Ethylenediamine 0.6g, foam stabilizer 1.6g, deionized water 0.9g, stir evenly at room temperature, and let stand for 15min; quickly add 26.3g of diphenylmethane diisocyanate, stir at high speed at 2000r / min, when the mixture When it turns white, it is poured into a mold to form, and after curing at room temperature for 4 hours, the mold is released to obtain a heavy metal ion adsorption polyurethane foam material. Its properties are as follows: foam density 67Kg / m 3 , Cu 2+ , Hg + , Ni 2+ , Cr 3+ , Pb 2+ , Cd 2+ The adsorption rate of heavy metal ions was between 81.3% and 87.2%.
Example Embodiment
[0022] Example 2
[0023] In a reaction vessel equipped with a stirrer and a thermometer, add 100 g of polyether polyol (hydroxyl value 39 mgKOH / g), 8.4 g of HFC-245fa, a solution obtained by dissolving 1.6 g of 8-hydroxyquinoline, 0.5 g of octylenene, tetra 1 g of ethylene triamine, 2.5 g of foam stabilizer, 2.3 g of deionized water, stir evenly at room temperature, and let stand for 20 minutes; quickly add 30.1 g of toluene diisocyanate, stir at high speed at 2000 r / min, and pour when the mixture turns white It was molded into a mold, aged for 4 hours at room temperature, and then demolded to obtain a heavy metal ion adsorption polyurethane foam material. Its properties are as follows: foam density 34Kg / m 3 , Cu 2+ , Hg + , Ni 2+ , Cr 3+ , Pb 2+ , Cd 2+ The adsorption rate of heavy metal ions is between 91.0% and 97.6%.
Example Embodiment
[0024] Example 3
[0025] In a reaction vessel equipped with a stirrer and a thermometer, add 100 g of polyether polyol (hydroxyl value 53 mgKOH / g), 4.6 g of HCFC-141b and the solution obtained by dissolving 0.9 g of 8-hydroxyquinoline, and 0.6 g of dibutyltin dilaurate. , 1.5g of tetraethylenetriamine, 1g of foam stabilizer, 0.6g of deionized water, stir evenly at room temperature, and let stand for 20min; quickly add 22.8g of polymethyl polyphenyl isocyanate, and stir at high speed at 2000r / min speed , when the mixture turns white, it is poured into a mold to form, and after being aged for 5 hours at room temperature, the mold is demolded to obtain a heavy metal ion adsorption polyurethane foam material. Its properties are as follows: foam density 71Kg / m 3 , Cu 2+ , Hg + , Ni 2+ , Cr 3+ , Pb 2+ , Cd 2+ The adsorption rate of heavy metal ions was between 84.1% and 90.8%.
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