Chemical composition, fiber morphology, and pulping of P. bolleana Lauche.

摘要

The chemical composition (cellulose, hemicelluloses, lignin, extractives and ash) and fibre morphology of the Populus bolleana was assessed for its suitability for pulping and papermaking comparing it with red pine [Pinus densiflora] (softwood), China poplar (P. gansuensis, hardwood) and wheat straw (non-wood). The P. bolleana used in this study contained a low amount of lignin, but higher quantities of cellulose and hemicelluloses. It was found that the morphological indices of P. bolleana were adequate for pulping and papermaking. The pulping of this wood was carried out using conventional kraft and soda pulping process under varying conditions. The results indicated that at higher sulfidity (24%-32%) with lower EA (14-16%), higher yields, and viscosity of pulping were obtained with an acceptable kappa number. Kraft pulp of P. bolleana obtained at given conditions (EA 14-16%; sulfidity 24-32%) provided paper sheets with greater tensile strength, burst index and tear index, at the same beating degree..