| Autor: |
Pinheiro MA; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil., Ribeiro MM; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil., Rosa DLS; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., Nascimento DDCB; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., da Silva ACR; Materials Science and Engineering Program, Federal University of Pará-UFPA, Ananindeua 67130-660, Brazil., Dos Reis MAL; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil., Monteiro SN; Materials Science Program, Military Institute of Engineering-IME, Rio de Janeiro 22290-270, Brazil., Candido VS; Engineering of Natural Resources of the Amazon Program, Federal University of Pará-UFPA, Belem 66075-110, Brazil. |
| Abstrakt: |
Natural lignocellulosic fibers (NLFs) have in recent decades appeared as sustainable reinforcement alternatives to replace synthetic fibers in polymer composite material applications. In this work, for the first time, the periquiteira ( Cochlospermum orinocense ), a lesser known NLF from the Amazon region, was analyzed for its density and, by X-ray diffraction (XRD), to calculate the crystallinity index as well as the microfibrillar angle (MFA), thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR), scanning electron analysis (SEM) and tensile strength. The apparent density found for the periquiteira fiber was 0.43 g/cm 3 , one of the NLF's lowest. XRD analysis indicated a crystallinity index of 70.49% and MFA of 7.32°. The TGA disclosed thermal stability up to 250 °C. The FTIR analysis indicated the presence of functional groups characteristic of NLFs. The SEM morphological analysis revealed that the periquiteira fiber presents fine bundles of fibrils and a rough surface throughout its entire length. The average strength value of the periquiteira fiber was found as 178 MPa. These preliminary results indicate that the periquiteira fiber has the potential to be used as a reinforcing agent in polymeric matrices and can generate a lightweight composite with excellent mechanical properties that can be used in various industrial sectors. |
