Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water
Polyurethane foams functionalized with sulfonic acid groups are used in this study to exchange lead (Pb2+) ions from aqueous solutions. Toluene-2, 4-diisocyanate, 2,6-diisocyanate (TDI) was reacted with Polypropylene glycol 1200 (PPG) in 2 : 1 molar ratio to form a linear prepolymer. The linear prep...
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| Format: | Article |
| Language: | English |
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Wiley
2014-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2014/570309 |
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| author | Subhashini Gunashekar Nidal Abu-Zahra |
| author_facet | Subhashini Gunashekar Nidal Abu-Zahra |
| author_sort | Subhashini Gunashekar |
| collection | DOAJ |
| description | Polyurethane foams functionalized with sulfonic acid groups are used in this study to exchange lead (Pb2+) ions from aqueous solutions. Toluene-2, 4-diisocyanate, 2,6-diisocyanate (TDI) was reacted with Polypropylene glycol 1200 (PPG) in 2 : 1 molar ratio to form a linear prepolymer. The linear prepolymer was further polymerized using N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), which acts both as a chain extender and an ion-exchanger for Pb2+ ions. The functionalized polyurethane foam was characterized by Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The Pb2+ ion exchange capacity was determined using an Inductively Coupled Plasma Mass Spectrometer (ICP-MS). The maximum Pb2+ ion exchange capacity of the foam was found to be 51 ppb/g from a 100 ppb Pb2+ solution over a period of two hours. In addition, pH analysis was carried out on the foam composition with the best Pb2+ ion removal capacity. The pH results based on two-hour exposures showed that the functionalized polyurethane foam performed better at lower pH levels. |
| format | Article |
| id | doaj-art-0ae35a5d01ad406b9f578db3d9107df8 |
| institution | Kabale University |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-0ae35a5d01ad406b9f578db3d9107df82025-02-03T05:58:59ZengWileyInternational Journal of Polymer Science1687-94221687-94302014-01-01201410.1155/2014/570309570309Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from WaterSubhashini Gunashekar0Nidal Abu-Zahra1Materials Science and Engineering Department, University of Wisconsin-Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53201, USAMaterials Science and Engineering Department, University of Wisconsin-Milwaukee, 3200 N Cramer Street, Milwaukee, WI 53201, USAPolyurethane foams functionalized with sulfonic acid groups are used in this study to exchange lead (Pb2+) ions from aqueous solutions. Toluene-2, 4-diisocyanate, 2,6-diisocyanate (TDI) was reacted with Polypropylene glycol 1200 (PPG) in 2 : 1 molar ratio to form a linear prepolymer. The linear prepolymer was further polymerized using N,N-bis(2-hydroxyethyl)-2-aminoethanesulfonic acid (BES), which acts both as a chain extender and an ion-exchanger for Pb2+ ions. The functionalized polyurethane foam was characterized by Fourier transform infrared spectroscopy (FTIR), gel permeation chromatography (GPC), scanning electron microscopy (SEM), and energy dispersive X-ray spectroscopy (EDX). The Pb2+ ion exchange capacity was determined using an Inductively Coupled Plasma Mass Spectrometer (ICP-MS). The maximum Pb2+ ion exchange capacity of the foam was found to be 51 ppb/g from a 100 ppb Pb2+ solution over a period of two hours. In addition, pH analysis was carried out on the foam composition with the best Pb2+ ion removal capacity. The pH results based on two-hour exposures showed that the functionalized polyurethane foam performed better at lower pH levels.http://dx.doi.org/10.1155/2014/570309 |
| spellingShingle | Subhashini Gunashekar Nidal Abu-Zahra Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water International Journal of Polymer Science |
| title | Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water |
| title_full | Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water |
| title_fullStr | Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water |
| title_full_unstemmed | Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water |
| title_short | Characterization of Functionalized Polyurethane Foam for Lead Ion Removal from Water |
| title_sort | characterization of functionalized polyurethane foam for lead ion removal from water |
| url | http://dx.doi.org/10.1155/2014/570309 |
| work_keys_str_mv | AT subhashinigunashekar characterizationoffunctionalizedpolyurethanefoamforleadionremovalfromwater AT nidalabuzahra characterizationoffunctionalizedpolyurethanefoamforleadionremovalfromwater |