WOOD RESEARCH Volume 61, Number 6, 2016
Adam Wójciak

Deacidification of paper with Mg(OH)2 nanoparticles: The impact of dosage on process effectiveness

The aim of the work was to analyse the influence of Mg(OH)2 nanoparticle dosage on the deacidification process, especially in relation to paper permanence. Samples of model papers were characterised by SEM-EDX and XPS methods which proved effective neutralisation. The influence of the suspension concentration was evaluated on cellulose DP and on the optical properties after the paper thermal ageing process. Generally, the protective effect of deacidification increased along with an increased dosage of the magnesium hydroxide nanoparticles in artificially acidified paper samples and in papers covered with iron gall ink.

WOOD RESEARCH Volume 64, Number 2, 2019
Jan Bocianowski, Ewa Fabisiak, Krzysztof Joachimiak, and Adam Wójciak

NSSC pulping of Miscanthus giganteus and birch wood Part 2: A comparison of papermaking potential and strength properties

In this paper we compare the anatomical features (number of fibrous elements in the pulp unit, fiber length, diameter of fibers and lumens, coefficients of slenderness, flexibility and the Runkel coefficient) of both Miscanthus giganteus and birch wood. The raw materials were tested prior to pulping, after pulping and after refining. Comparisons of defibering ability and selected strength properties (CMT, SCT, tear resistance, burst) allowed evaluating the papermaking potential of neutral sulfite pulps obtained from the above-mentioned raw materials.

WOOD RESEARCH Volume 64, Number 1, 2019
Krzysztof Joachimiak, Renata Wojech, and Adam Wójciak

Comparison of Miscanthus giganteus and birch wood nssc pulping Part I: The effects of technological conditions on certain pulp properties

Chemical composition and susceptibility to delignification by neutral sulfate liquor of Miscanthus giganteus stems and of birch wood were compared. The yield of pulping as well as degree and selectivity of delignification were tested in various technological conditions (cooking time, hydro module, alkali charge). Having a similar chemical composition, Miscanthus giganteus stems are subjected to quicker and deeper delignification with neutral sulfite liquor than birch wood. This phenomenon is probably associated with differences in the qualitative composition of lignin, distribution of lignin in the cell walls and in the morphological features of both raw materials.