Extraction of Cellulose Nanocrystal from Multilayer Packaging Residues Composed of a Mixture of Eucalyptus and Pine Fibers
| Autor: | Luís Antonio Pinheiro, Gustavo Adolfo Duarte Urueña, Kairin Cristine Ribeiro, Benjamim de Melo Carvalho, Eduardo Prestes |
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| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Paperboard Thermogravimetric analysis Environmental Engineering Materials science Renewable Energy Sustainability and the Environment 020209 energy Extraction (chemistry) Sulfuric acid 02 engineering and technology 01 natural sciences chemistry.chemical_compound Acetic acid chemistry Chemical engineering 010608 biotechnology visual_art 0202 electrical engineering electronic engineering information engineering visual_art.visual_art_medium Acid hydrolysis Cellulose Hydrogen peroxide Waste Management and Disposal |
| Zdroj: | Waste and Biomass Valorization. 12:5763-5777 |
| ISSN: | 1877-265X 1877-2641 |
| DOI: | 10.1007/s12649-021-01383-4 |
| Popis: | This study takes advantage of a residue from the multilayer packaging recycling process as a raw material for the extraction of cellulose nanocrystals in just three purification steps: pulping with acetic acid, bleaching with hydrogen peroxide, and acid hydrolysis with sulfuric acid. The nanocrystals obtained from the multilayer packaging showed high crystallinity (77%), and transmission electron microscopy revealed 71% of the nanocrystals with an aspect ratio between 24 and 64. XRD revealed that pulping treatments with acetic acid removed carbonate calcium from the paperboard, and bleaching, together with acid hydrolysis, contributed to the gradual reduction of kaolin, components present in the multilayered paperboard manufacture. Therefore, without the use of additional purification steps, these components were gradually reduced until their detection by XRD is not possible. The thermogravimetric analysis showed good stability of the cellulose nanocrystals (Tonset = 190 °C and Tmax = 245 °C), allowing their future application in nanocomposites. |
| Databáze: | OpenAIRE |
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