Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity
Water pollution is one of the most serious problems worldwide. Nanocellulose-based aerogels usually show excellent adsorption capacities due to their high aspect ratio, specific surface area and surface charge, making them ideal for water purification. In this work, (ligno)cellulose nanofibers (LCNF...
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| Format: | Article |
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MDPI AG
2022-01-01
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| Series: | Biomolecules |
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| Online Access: | https://www.mdpi.com/2218-273X/12/2/232 |
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| author | Ramón Morcillo-Martín Eduardo Espinosa Laura Rabasco-Vílchez Laura M. Sanchez Jorge de Haro Alejandro Rodríguez |
| author_facet | Ramón Morcillo-Martín Eduardo Espinosa Laura Rabasco-Vílchez Laura M. Sanchez Jorge de Haro Alejandro Rodríguez |
| author_sort | Ramón Morcillo-Martín |
| collection | DOAJ |
| description | Water pollution is one of the most serious problems worldwide. Nanocellulose-based aerogels usually show excellent adsorption capacities due to their high aspect ratio, specific surface area and surface charge, making them ideal for water purification. In this work, (ligno)cellulose nanofibers (LCNFs/CNFs) from wheat straw residues were obtained using two types of pre-treatments: mechanical (Mec) and TEMPO-mediated oxidization (TO), to obtain different consistency (0.2, 0.4, 0.6 and 0.8) bioaerogels, and their adsorption capacities as dye removers were further studied. The materials were characterized in terms of density, porosity and mechanical properties. An inversely proportional relationship was observed between the consistencies of the aerogels and their achieved densities. Despite the increase in density, all samples showed porosities above 99%. In terms of mechanical properties, the best results were obtained for the 0.8% consistency LCNF and CNF-Mec aerogels, reaching 67.87 kPa and 64.6 kPa for tensile strength and Young’s modulus, respectively. In contrast, the adsorption capacity of the aerogels was better for TEMPO-oxidized aerogels, reaching removal rates of almost 100% for the CNF-TO5 samples. Furthermore, the residual lignin content in LCNF-Mec aerogels showed a great improvement in the removal capacity, reaching rates higher than 80%, further improving the cost efficiency of the samples due to the reduction in chemical treatments. |
| first_indexed | 2024-03-09T22:30:24Z |
| format | Article |
| id | doaj.art-eecab7a90b094165bbabaa5b849dff52 |
| institution | Directory Open Access Journal |
| issn | 2218-273X |
| language | English |
| last_indexed | 2024-03-09T22:30:24Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Biomolecules |
| spelling | doaj.art-eecab7a90b094165bbabaa5b849dff522023-11-23T18:58:36ZengMDPI AGBiomolecules2218-273X2022-01-0112223210.3390/biom12020232Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal CapacityRamón Morcillo-Martín0Eduardo Espinosa1Laura Rabasco-Vílchez2Laura M. Sanchez3Jorge de Haro4Alejandro Rodríguez5Biopren Group (RNM940), Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, 14014 Córdoba, SpainBiopren Group (RNM940), Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, 14014 Córdoba, SpainBiopren Group (RNM940), Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, 14014 Córdoba, SpainBiopren Group (RNM940), Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, 14014 Córdoba, SpainBiopren Group (RNM940), Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, 14014 Córdoba, SpainBiopren Group (RNM940), Chemical Engineering Department, Faculty of Science, Universidad de Córdoba, 14014 Córdoba, SpainWater pollution is one of the most serious problems worldwide. Nanocellulose-based aerogels usually show excellent adsorption capacities due to their high aspect ratio, specific surface area and surface charge, making them ideal for water purification. In this work, (ligno)cellulose nanofibers (LCNFs/CNFs) from wheat straw residues were obtained using two types of pre-treatments: mechanical (Mec) and TEMPO-mediated oxidization (TO), to obtain different consistency (0.2, 0.4, 0.6 and 0.8) bioaerogels, and their adsorption capacities as dye removers were further studied. The materials were characterized in terms of density, porosity and mechanical properties. An inversely proportional relationship was observed between the consistencies of the aerogels and their achieved densities. Despite the increase in density, all samples showed porosities above 99%. In terms of mechanical properties, the best results were obtained for the 0.8% consistency LCNF and CNF-Mec aerogels, reaching 67.87 kPa and 64.6 kPa for tensile strength and Young’s modulus, respectively. In contrast, the adsorption capacity of the aerogels was better for TEMPO-oxidized aerogels, reaching removal rates of almost 100% for the CNF-TO5 samples. Furthermore, the residual lignin content in LCNF-Mec aerogels showed a great improvement in the removal capacity, reaching rates higher than 80%, further improving the cost efficiency of the samples due to the reduction in chemical treatments.https://www.mdpi.com/2218-273X/12/2/232aerogelsdye removallignocellulosic biomasscircular economybiorefinery |
| spellingShingle | Ramón Morcillo-Martín Eduardo Espinosa Laura Rabasco-Vílchez Laura M. Sanchez Jorge de Haro Alejandro Rodríguez Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity Biomolecules aerogels dye removal lignocellulosic biomass circular economy biorefinery |
| title | Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity |
| title_full | Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity |
| title_fullStr | Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity |
| title_full_unstemmed | Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity |
| title_short | Cellulose Nanofiber-Based Aerogels from Wheat Straw: Influence of Surface Load and Lignin Content on Their Properties and Dye Removal Capacity |
| title_sort | cellulose nanofiber based aerogels from wheat straw influence of surface load and lignin content on their properties and dye removal capacity |
| topic | aerogels dye removal lignocellulosic biomass circular economy biorefinery |
| url | https://www.mdpi.com/2218-273X/12/2/232 |
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