Barley Straw (Hordeum vulgare) as a Supplementary Raw Material for Eucalyptus camaldulensis and Pinus sylvestris Kraft Pulp in the Paper Industry
Autor
Vargas González, Fátima
González, Zoilo
Rojas, Orlando
Garrote, Gil
Rodríguez Pascual, Alejandro
Editor
NC State UniversityFecha
2015Materia
Barley strawAgrifood residue
Biomass resources
Cellulose
Paper
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The present study shows that barley straw (Hordeum vulgare) can be a
supplementary raw material of softwoods and hardwoods such as Pinus
sylvestris and Eucalyptus camaldulensis, respectively, for the production
of cellulose and paper, reducing an agricultural residue that has no added
value. Barley straw has a lower content of cellulose at 36.4% than P.
sylvestris and E. camaldulensis, but it contains a lower quantity of lignin,
15.9%. After pulping with soda anthraquinone (AQ), high contents of
cellulose (56.5 to 67.5%) and holocellulose (>80%) were attained. Paper
sheet properties were able to reach, and even improve upon, those of
wood species (Pinus and Eucalyptus) pulped with kraft. Better values of
total yield (56.5%), Kappa number (8.9), and ISO brightness (36.4%), were
attained for paper sheets from barley straw pulp versus E. camaldulensis
and P. sylvestris, respectively, and comparable values for viscosity,
tensile, and burst index were obtained.