Kraft pulp and chemical properties of Cecropia palmata wood

Abstract

The present study was aimed at evaluating the chemical properties and the kraft pulp produced for Cecropia palmata wood and comparing them with Eucalyptus grandis wood. Discs along the stem of 6-year-old trees were transformed into chips. Half of the chips were used for characterisation of wood chemical properties and the rest was cooked to produce kraft pulp. The properties of the pulp were determined and results showed that:(1) there was a decrease of 3.8% in the yield of C. palmata pulp compared with E. grandis; (2) specific volume of C. palmata wood pulp increased with increasing refining time but the time to reach the same Schopper-Riegler degree was shorter than E. grandis pulp; and (3) C. palmata had higher air resistance and tear index than E. grandis, while the opposite was observed for tensile index, burst index and stretch. Cecropia palmata wood had lower lignin content and higher total extractives and holocellulose contents than E. grandis wood.

Post-O2 Eucalyptus Pulp in a/D(ep)dp Bleaching Sequence Washed With Recirculation of the Alkaline Filtrate

“…These spaces were scarce in the refined pulps, so the light crossed only the cell wall with lower diffraction (Biermann 1996). The opacity reduction with the refining increment was reported for grass (Andrade & Colodette 2016), softwood (Chen et al 2016(Chen et al , 2017 and hardwood (Zanuncio et al 2016, Pupo et al 2019 pulps.…”