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http://hdl.handle.net/1843/50893| Type: | Artigo de Periódico |
| Title: | Microwave-assisted synthesis of polyacrylamide-aminated graphene oxide hybrid hydrogel with improved adsorption properties |
| Authors: | Marcelo Machado Viana Sthéfany Zaida Silva do Amparo Meiriane Cristina Faria Soares Lima Raquel Cristina Fonseca Gonçalves Lopes Cláudia Karina Barbosa de Vasconcelos Vinicius Caliman Glaura Goulart Silva |
| Abstract: | Few layers graphene oxide (GO), graphene oxide functionalized with diethylenetriamine (GO-DETA) and the hybrid of graphene oxide-diethylenetriamine and polyacrylamide (GO-DETA/PAM) hydrogel with high adsorption of methylene blue were prepared using microwave-assisted methods. TGA and XPS analysis were performed to confirm DETA molecules incorporation on GO and to identify an in-situ acrylamide polymerization with no usual chemical cross-linkers. The morphology and structure of the graphene derivative materials and hybrid gel were evaluated by TEM and SEM images. The obtained GO-DETA sheets played an important role as a cross-linker agent during the polymerization of PAM to form the hybrid GO-DETA/PAM. The results obtained showed that the GO-DETA influenced the swelling behavior and thermal properties of PAM, as well as improved its Tg, presenting a more stable PAM network in saline conditions. The hybrid hydrogel significantly improved the capacity to adsorb methylene blue (maximum adsorption capacity 205.4 mg g−¹), compared to the neat PAM (maximum adsorption capacity 51.5 mg g−¹). This feature demonstrates how this novel material can be used in the removal of emerging contaminants in water, for example, using a fast and reproducible synthetic method and lower quantities of adsorbent. |
| Subject: | Engenharia Química Nanotecnologia Materiais nanoestruturados Poliacrilamida Óxido de grafeno Síntese inorgânica Adsorção Polimerização Coloides |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | COLTEC - COLEGIO TECNICO ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.jece.2020.104415 |
| URI: | http://hdl.handle.net/1843/50893 |
| Issue Date: | Oct-2020 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S2213343720307648 |
| metadata.dc.relation.ispartof: | Journal of Environmental Chemical Engineering |
| Appears in Collections: | Artigo de Periódico |
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