Lignin-based hydrogels with 'super-swelling' capacities for dye removal
| Autor: | Maria Soledad Peresin, Tarja Tamminen, Anna Stiina Jääskeläinen, Alejandro Rodríguez, Eneko Larrañeta, Juan Domínguez-Robles |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Absorption of water
Lignocellulosic biomass 02 engineering and technology macromolecular substances 010402 general chemistry 01 natural sciences Biochemistry Lignin complex mixtures chemistry.chemical_compound Adsorption Structural Biology Dye removal medicine SDG 7 - Affordable and Clean Energy Coloring Agents Molecular Biology Lignin hydrogels Mechanical Phenomena chemistry.chemical_classification Chemistry ta1182 technology industry and agriculture Hydrogels General Medicine Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Methylene Blue Chemical engineering Sodium hydroxide Self-healing hydrogels Water absorption Swelling medicine.symptom 0210 nano-technology Water Pollutants Chemical |
| Zdroj: | Dominguez Robles, J, Peresin, M S, Tamminen, T, Rodríguez, A, Larrañeta, E & Jääskeläinen, A-S 2018, ' Lignin-based hydrogels with “super-swelling” capacities for dye removal ', International Journal of Biological Macromolecules, vol. 115, pp. 1249-1259 . https://doi.org/10.1016/j.ijbiomac.2018.04.044 Domínguez-Robles, J, Peresin, M S, Tamminen, T, Rodríguez, A, Larrañeta, E & Jääskeläinen, A S 2018, ' Lignin-based hydrogels with “super-swelling” capacities for dye removal ', International Journal of Biological Macromolecules, vol. 115, pp. 1249-1259 . https://doi.org/10.1016/j.ijbiomac.2018.04.044 |
| Popis: | Lignin is a complex natural polymer and it is one of the main constituent of the lignocellulosic biomass. Moreover, it is a bio-renewable material and it is available in large amounts as by-product of residues from the wood and paper industries. Lignin-based hydrogels with high swelling capabilities were prepared by crosslinking poly (methyl vinyl ether co‑maleic acid) and different technical lignins in ammonium and sodium hydroxide solutions. The produced hydrogels showed a wide range of water absorption capacities varying from 13 to 130 g of water per 1 g of sample. It was observed that materials with higher water uptake poorer mechanical performance, as evaluated in terms of storage and loss modulus (G′ and G″, respectively). Methylene blue (MB) was used as a model dye to evaluate the adsorption and release capabilities of the lignin hydrogels. Results suggested that these hydrogels showed a high MB load efficiency, which ranged from 440 mg to 840 mg/g. On the contrary, the percentages of MB released depended on the negative surface charge of the hydrogels, showing values which ranged from 0.06 to 0.35%. Thus, these materials have potential to be used as adsorbents for the removal of organic dyes from waste water. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|