Natural fiber for reinforcement in matrix polymeric

Abstract

The natural fiber market has been growing extraordinarily. Hereupon the current work presents the natural fiber of the periquiteira tree Cochlospermum orinocense of the Amazon forest. The chemical composition, physical aspects, morphology, thermal and mechanical properties of this fiber will be discussed. The thermal stability of the fiber samples was about 200 °C. The decomposition of cellulose and hemicelluloses in the fibers occurred at 300 ºC and above, while the degradation of the fibers happened above 400 °C. This fiber had good specific strength and good binding properties due to their low weight and presence of high cellulose (60.15wt.%), low lignin (12.03wt.%). More pronounced mass loss indicated the degradation of the amorphous regions of the cellulose, and finally reached a peak of approximately 390 °C.

Periquiteira (Cochlospermum orinocense): A Promising Amazon Fiber for Application in Composite Materials

“…The average value found for the strength of the periquiteira fiber was 178 MPa. This value is similar to that found by da Silva et al [45]. However, it is higher when compared to the strength of some NLFs that have been investigated for possible applications in composite materials [49,53,[55][56][57][58][59].…”

“…This same pattern was also observed by Moshi et al [49] and Maache et al [53]. The cellulose chain degradation is observed at temperatures close to 300 °C, due to the inert atmosphere [50] used in this experiment, a fact also observed by da Silva [45], Cunha et al [54] Figure 5. TG and DTG obtained for periquiteira fibers.…”

“…This same pattern was also observed by Moshi et al [49] and Maache et al [53]. The cellulose chain degradation is observed at temperatures close to 300 • C, due to the inert atmosphere [50] used in this experiment, a fact also observed by da Silva [45], Cunha et al [54] and Moshi et al [49]. After this temperature, no mass loss is observed, suggesting that beyond this stage, all components of the natural fiber were thermally degraded.…”

“…The TG curve shows that fiber mass reduction occurs within two temperature ranges, as noted by da Silva et al [45]. Between RT and 120 • C, the first reduction occurs, related to the evaporation of water, which evidences the presence of the OH group in the structure of the fibers [50].…”

“…It is observed that the periquiteira fiber presents an increase in the average value of strain for fibers with greater diameter, confirming the results obtained for the apparent It is observed that the periquiteira fiber presents an increase in the average value of strain for fibers with greater diameter, confirming the results obtained for the apparent Young's modulus shown in Figure 9. The greater amount of microfibrils and lower lignin contents [45] in the higher-diameter fibers may contribute to the increase in fiber strain.…”