Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal
Keratin has the capacity to interact with metal ions. In order to take advantage of this potential, a novel membrane with polyurethane and keratin has been developed and studied for removal of Cr(VI) from aqueous solution. Physicochemical and morphological properties of these hybrid membranes were s...
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2013/892547 |
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| author | María D. Manrique-Juárez Ana L. Martínez-Hernández Oscar F. Olea-Mejía Jaime Flores-Estrada José L. Rivera-Armenta Carlos Velasco-Santos |
| author_facet | María D. Manrique-Juárez Ana L. Martínez-Hernández Oscar F. Olea-Mejía Jaime Flores-Estrada José L. Rivera-Armenta Carlos Velasco-Santos |
| author_sort | María D. Manrique-Juárez |
| collection | DOAJ |
| description | Keratin has the capacity to interact with metal ions. In order to take advantage of this potential, a novel membrane with polyurethane and keratin has been developed and studied for removal of Cr(VI) from aqueous solution. Physicochemical and morphological properties of these hybrid membranes were studied, varying synthesis parameters such as the type of isocyanate and pH in keratin solution. The effects of using diphenyl-methane-diisocyanate or toluene-diisocyanate and modifying the pH in keratin solutions were evaluated by scanning electron microscopy, Fourier transform infrared spectroscopy, and dynamical mechanical analysis. Results show that pH has a strong influence on morphology and on Cr(VI) removal efficiency. When pH in keratin solution is low (2.5), the protein separates from water, and a more closed cell in the membrane is obtained affecting its mechanical properties. The removal efficiency of Cr(VI) was also assessed at different pH values of chromium solutions. These results show that when pH of the Cr solution is acidic (at 1.5), the Cr(VI) removal percentages increase significantly, reaching up to a 58%. Thus this paper demonstrates the successful combination of synthetic and natural polymers depending on the process parameters to be applied in the critical purpose of remediation of Cr(VI) contamination. |
| format | Article |
| id | doaj-art-52062215f2f84225940e2f75edb6d28d |
| institution | Kabale University |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-52062215f2f84225940e2f75edb6d28d2025-02-03T01:28:39ZengWileyInternational Journal of Polymer Science1687-94221687-94302013-01-01201310.1155/2013/892547892547Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) RemovalMaría D. Manrique-Juárez0Ana L. Martínez-Hernández1Oscar F. Olea-Mejía2Jaime Flores-Estrada3José L. Rivera-Armenta4Carlos Velasco-Santos5Posgrado en Ciencia de Materiales, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón Esquina, Paseo Tollocan, 50120 Toluca, MEX, MexicoDivisión de Estudios de Posgrado e Investigación, Instituto Tecnológico de Querétaro, Avenida Tecnológico s/n, Esquina Gral. Mariano Escobedo, 76000 Colonia Centro Histórico, QRO, MexicoCentro Conjunto de Investigación en Química Sustentable UAEM-UNAM, Facultad de Química, Universidad Autónoma del Estado de México, Km. 14.5 de la carretera Toluca-Atlacomulco, 50200 San Cayetano, MEX, MexicoPosgrado en Ciencia de Materiales, Facultad de Química, Universidad Autónoma del Estado de México, Paseo Colón Esquina, Paseo Tollocan, 50120 Toluca, MEX, MexicoDivisión de Estudios de Posgrado e Investigación, Instituto Tecnológico de Cd. Madero, J. Rosas y J. Urueta s/n, Colonia Los Mangos, 89440 Ciudad Madero, TAMPS, MexicoDivisión de Estudios de Posgrado e Investigación, Instituto Tecnológico de Querétaro, Avenida Tecnológico s/n, Esquina Gral. Mariano Escobedo, 76000 Colonia Centro Histórico, QRO, MexicoKeratin has the capacity to interact with metal ions. In order to take advantage of this potential, a novel membrane with polyurethane and keratin has been developed and studied for removal of Cr(VI) from aqueous solution. Physicochemical and morphological properties of these hybrid membranes were studied, varying synthesis parameters such as the type of isocyanate and pH in keratin solution. The effects of using diphenyl-methane-diisocyanate or toluene-diisocyanate and modifying the pH in keratin solutions were evaluated by scanning electron microscopy, Fourier transform infrared spectroscopy, and dynamical mechanical analysis. Results show that pH has a strong influence on morphology and on Cr(VI) removal efficiency. When pH in keratin solution is low (2.5), the protein separates from water, and a more closed cell in the membrane is obtained affecting its mechanical properties. The removal efficiency of Cr(VI) was also assessed at different pH values of chromium solutions. These results show that when pH of the Cr solution is acidic (at 1.5), the Cr(VI) removal percentages increase significantly, reaching up to a 58%. Thus this paper demonstrates the successful combination of synthetic and natural polymers depending on the process parameters to be applied in the critical purpose of remediation of Cr(VI) contamination.http://dx.doi.org/10.1155/2013/892547 |
| spellingShingle | María D. Manrique-Juárez Ana L. Martínez-Hernández Oscar F. Olea-Mejía Jaime Flores-Estrada José L. Rivera-Armenta Carlos Velasco-Santos Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal International Journal of Polymer Science |
| title | Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal |
| title_full | Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal |
| title_fullStr | Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal |
| title_full_unstemmed | Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal |
| title_short | Polyurethane-Keratin Membranes: Structural Changes by Isocyanate and pH, and the Repercussion on Cr(VI) Removal |
| title_sort | polyurethane keratin membranes structural changes by isocyanate and ph and the repercussion on cr vi removal |
| url | http://dx.doi.org/10.1155/2013/892547 |
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