| Autor: |
Aliabadi M; Department of Paper Sciences and Engineering, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan 00386, Iran., Chee BS; Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland., Matos M; Embrapa Florestas, Colombo 00319, Brazil., Cortese YJ; Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland., Nugent MJD; Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland., de Lima TAM; Materials Research Institute, Athlone Institute of Technology, N37 HD68 Athlone, Ireland., Magalhães WLE; Embrapa Florestas, Colombo 00319, Brazil., de Lima GG; Programa de Pós-Graduação em Engenharia e Ciência dos Materiais-PIPE, Universidade Federal do Paraná, Curitiba, Paraná 19011, Brazil. |
| Abstrakt: |
Microfibrillated cellulose films have been gathering considerable attention due to their high mechanical properties and cheap cost. Additionally, it is possible to include compounds within the fibrillated structure in order to confer desirable properties. Ilex paraguariensis A. St.-Hil, yerba mate leaf extract has been reported to possess a high quantity of caffeoylquinic acids that may be beneficial for other applications instead of its conventional use as a hot beverage. Therefore, we investigate the effect of blending yerba mate extract during and after defibrillation of Eucalyptus sp. bleached kraft paper by ultrafine grinding. Blending the extract during defibrillation increased the mechanical and thermal properties, besides being able to use the whole extract. Afterwards, this material was also investigated with high content loadings of starch and glycerine. The results present that yerba mate extract increases film resistance, and the defibrillated cellulose is able to protect the bioactive compounds from the extract. Additionally, the films present antibacterial activity against two known pathogens S. aureus and E. coli , with high antioxidant activity and increased cell proliferation. This was attributed to the bioactive compounds that presented faster in vitro wound healing, suggesting that microfibrillated cellulose (MFC) films containing extract of yerba mate can be a potential alternative as wound healing bandages. |
