Characterizing Cellulosic Fibers from Ulex europaeus

Celis, R.; Torres M.; Valenzuela P.; Ríos R.; Gacitúa W.; Pesenti H.

Keywords: ulex europaeus, properties, nanoindentation, Biofiber


Information on the morphological and physical properties of biofibers is necessary to support the mechanical understanding of the biological design of plants, as well as for the development of new technology that adds value to non-traditional bioresources, such as those based on Ulex europaeus fibers. Ulex europaeus fibers were extracted through a chemical pulping process at 170 degrees C and with 40 g/L NaOH. The dimensions of the fibers produced were 0.97 +/- 0.1 mm in length and 13 +/- 2 mu m in diameter. Pressed fiber paper sheets were made to evaluate their mechanical properties. Burst and tear indices of 1.2 mN/kg and 8.6 Nm(2)/kg, respectively, were recorded. The values obtained did not compare well to fiber paper sheets from Pinus radiata, presumably due to the significant amount of non-structural elements of wood present in the samples and the lower length of Ulex europaeus fibers, which resulted in lower tensile strength. Additionally, nanoindentation tests were conducted to assess the hardness and elastic modulus of the fibers, obtaining average values of 0.84 GPa and 9.23 GPa for the stem, respectively. These values were significantly lower than those of industrial biofiber, perhaps due to the lower morphogenic maturity of Ulex europaeus fibers compared to other traditional sources of fiber.

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Título según WOS: Characterizing Cellulosic Fibers from Ulex europaeus
Título según SCOPUS: Characterizing cellulosic fibers from Ulex europaeus
Título de la Revista: BIORESOURCES
Volumen: 9
Número: 4
Fecha de publicación: 2014
Página de inicio: 6968
Página final: 6980
Idioma: English