| Full text | |
| Author(s): |
Nacas, Amanda M.
;
Silva, Roberto L.
;
De Paoli, Marco A.
;
Spinace, Marcia A. S.
Total Authors: 4
|
| Document type: | Journal article |
| Source: | Journal of Applied Polymer Science; v. 134, n. 25, p. 8-pg., 2017-07-05. |
| Abstract | |
Curaua fibers (CF) were fibrillated using high-intensity ultrasonication, which is fast and uses water as a solvent. The fibrillated fibers (CFf) were used as reinforcement (20 wt %) in polypropylene composites processed by extrusion with or without 2 wt % of polypropylene grafted with maleic anhydride (PPMA). Fibrillation promotes an increase from 11.3 to 33.8 in the aspect ratio of the fiber. Sonication caused extraction of lignin and a decrease in the degree of crystallinity of the CF. Extrusion of the composites causes no additional fibrillation of the CF. A composite reinforced with CFf had tensile and flexural strength of 24.9% and 51.5%, respectively, higher than that of pristine PP. The use of PPMA and CFf in the composite promotes a further increase of 30% and 50.5% in these parameters, respectively. A thermal analysis of the composites using CFf with or without PPMA showed similar behavior. (C) 2017 Wiley Periodicals, Inc. (AU) | |
| FAPESP's process: | 10/17804-7 - Polymeric composites |
| Grantee: | Maria Isabel Felisberti |
| Support Opportunities: | Research Projects - Thematic Grants |
| FAPESP's process: | 11/00156-5 - Coupling agent effect on the environment properties of polymeric composites with lignocellulosic fibers |
| Grantee: | Márcia Aparecida da Silva Spinacé |
| Support Opportunities: | Regular Research Grants |