Lignin-Based Polyethylene Films with Enhanced Thermal, Opacity and Biodegradability Properties for Agricultural Mulch Applications
| Autor: | Verónica V. Nicolau, Suellen Signer Bartolomei, Diana Alejandra Estenoz, Esperidiana A. B. Moura, Lucio R. Chiappero |
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| Rok vydání: | 2020 |
| Předmět: |
Environmental Engineering
Softwood Materials science Polymers and Plastics 02 engineering and technology Polyethylene Raw material 021001 nanoscience & nanotechnology Linear low-density polyethylene chemistry.chemical_compound 020401 chemical engineering chemistry Chemical engineering Materials Chemistry Hardwood Lignin Extrusion 0204 chemical engineering 0210 nano-technology Kraft paper |
| Zdroj: | Journal of Polymers and the Environment. 29:450-459 |
| ISSN: | 1572-8919 1566-2543 |
| DOI: | 10.1007/s10924-020-01886-6 |
| Popis: | Lignins are promising alternative raw materials for biocomposites due to their renewability, low cost and abundance. In this work, the use of (softwood and hardwood) Kraft lignins in the development of LLDPE/lignin films for agricultural mulch applications is studied. Processable blends were obtained from unmodified softwood lignin (SW) and from hardwood lignin modified by esterification (HWE). LLDPE was pelletized with (2.5%, 5% and 10%) lignin with particle size between 38 and 75 μm and flexible films were blown extruded. Processable extrusion blends showed temperature differences lower than 20 °C between the Tg of lignin and the melting temperature of LLPDE. Films from neat LLPDE and with 2.5% of HWE and up to 5% SW exhibited statistically comparable (≅ 349%) values of ductility. Ester groups present in lignin improve weight loss of lignin-based blends after soil buried test. |
| Databáze: | OpenAIRE |
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