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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

Inactive Publication Date: 2013-07-31
江苏瑞丰科技实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects in the performance of existing adsorption materials, and provide a heavy metal ion adsorption polyurethane foam material that is non-toxic, non-polluting, low in cost, simple in operation, good in adsorption selectivity, and large in adsorption capacity.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 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 octanoic acid vinylidene, and Ethylenediamine 0.6g, foam stabilizer 1.6g, deionized water 0.9g, stir well at room temperature, let stand for 15min; quickly add diphenylmethane diisocyanate 26.3g, stir at a high speed at 2000r / min, when the mixture When it turns white, it is poured into a mold for molding, aged at room temperature for 4 hours, and then released from the mold to obtain a heavy metal ion adsorbed polyurethane foam material. Its performance is 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 is between 81.3% and 87.2%.

Embodiment 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 dissolved in 1.6 g of 8-hydroxyquinoline, 0.5 g of octanoic acid alkenylene, tetra Ethylenetriamine 1g, foam stabilizer 2.5g, deionized water 2.3g, stir well at room temperature, let stand for 20min; quickly add toluene diisocyanate 30.1g, stir at 2000r / min at high speed, when the mixture turns white, pour Put it into a mold for molding, and release the mold after aging for 4 hours at room temperature to obtain a heavy metal ion adsorbed polyurethane foam material. Its performance is 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%.

Embodiment 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 dissolved in 0.9 g of 8-hydroxyquinoline, and 0.6 g of dibutyltin dilaurate , tetraethylenetriamine 1.5g, foam stabilizer 1g, deionized water 0.6g, stir well at room temperature, let stand for 20min; quickly add polymethylpolyphenylisocyanate 22.8g, stir at 2000r / min at high speed , when the mixture turns white, it is poured into a mold for molding, and after aging at room temperature for 5 hours, it is released from the mold to obtain a heavy metal ion adsorbed polyurethane foam material. Its performance is 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 is between 84.1% and 90.8%.

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PUM

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Abstract

The invention discloses a polyurethane foamed material for soil heavy mental ion adsorption. The polyurethane foamed material is obtained by using polyether polyol, polyisocyanates, a chelating reagent, a catalyst, a foam stabilizer and deionized water as raw materials and carrying out polymerization. The polyurethane foamed material has excellent physical and chemical properties as well as high surface area, can be used to absorb a plurality of heavy metal ions and has large adsorption capacity. In addition, the polyurethane foamed material is nontoxic, has advantages of no pollution, low cost and simple operation, and has good application value and popularization prospect.

Description

technical field [0001] The invention belongs to the field of heavy metal adsorption materials, and in particular relates to a polyurethane foam material used for adsorption of soil heavy metal ions and a preparation method thereof. Background technique [0002] With the development of productivity in modern society, the discharge of pollutants from textile, electronics, chemical and other industries has increased sharply, and a large amount of heavy metal pollutants have also been discharged into the environment, which has caused serious harm to lower organisms, crops and human health. . The toxic effect of heavy metal ions is long and cannot be degraded by microorganisms, and will accumulate in the organism to cause cancer. As long as there is a trace amount of heavy metals in the soil, toxic reactions can occur. Generally, the toxicity range of heavy metals is about 1.0-10 mg / L, and the range of toxic concentration of heavy metals with strong toxicity, such as mercury and...

Claims

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Application Information

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IPC IPC(8): C08G18/48B01J20/26B01J20/28B01J20/30B09C1/00C08G101/00
Inventor 杜峰项尚林
Owner 江苏瑞丰科技实业有限公司
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