Cellulose-based nanomaterials are often prepared of native cellulose by direct dilution, which involves tedious processes and solvent recovery problems. In this work, we developed a novel class of hydrogels based on nanostructured cellulose prepared via a cellulose nanofiber (NFC) gelation process from fique fibers (Furcrae spp) oxidized with TEMPO. This oxidation process was used to generate negatively charged surfaces by adding carboxylate groups COO- . The degree of oxidation and the COO- concentration were evaluated by conductimetric titrations. Different TEMPO-oxidized NFC’s with different concentration of COO- were evaluated using TEM, SEM, FTIR, and DSC. As a result of the strong interactions between the COO- groups and the transition metals (M2+), these NFC’s were employed as matrixes for nucleation and growing of F3O4 and MnO2 metallic nanoparticles (NPs). Morphological and spectroscopic properties of the obtained nanocomposites in form of hydrogels, films, and xerogels were measured by SEM, FTIR, DSC, and XPS. We are using NFC/NPs M2+ nanocomposites to oxidize pollutants in industrial wastewaters.

From native colombian fibers to novel nanostructured materials: Industrial wastewater treatment applications

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.