Selaus tekijän mukaan kokoelmassa "Backfolk, Kaj"Väitöskirjat
Aineistot 1-9 / 9
-
Controlling particle morphology in the in-situ formation of precipitated calcium carbonate-fiber composites
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 12.11.2021)When precipitated or synthetized calcium carbonate (PCC) is prepared in the presence of cellulosic fibers, a large fraction of the PCC attaches partially onto and even into the fibers, forming a PCC-fiber composite. As the ... -
Effects of the partial removal of wood hemicelluloses on the properties of kraft pulp
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 04.12.2014)The objective of this work was to study the effects of partial removal of wood hemicelluloses on the properties of kraft pulp.The work was conducted by extracting hemicelluloses (1) by a softwood chip pretreatment process ... -
Hydrothermal stability of microfibrillated cellulose
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 06.09.2019)The aim of this study was to investigate the effects of hydrothermal treatment on microfibrillated cellulose (MFC). MFC gels were prepared by fibrillating never-dried kraft and dissolving pulps pretreated with endoglucanase. ... -
Interaction and barrier properties of nanocellulose and hydrophobically modified ethyl(hydroxyethyl)cellulose films and coatings
Acta Universitatis Lappeenrantaensis (Lappeenranta-Lahti University of Technology LUT, 31.03.2021)In food packaging applications, the oxygen barrier and resistance to oil and grease are essential properties of the packaging. The barrier performance of fibre-based packages needs to be improved with a coating, which is ... -
Magnesium hydroxide-based peroxide bleaching of high-brightness mechanical pulps
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 20.11.2013)A high final brightness is desired in most paper and board products. This requires bleaching processes that are able to produce high-brightness pulps. Mechanical pulps are widely bleached for high brightness using alkaline ... -
Oil and grease barrier properties of converted dispersion-coated paperboards
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 25.11.2016)Changes in consumer habits and the replacement of solid trans fats in foodstuffs with unsaturated fats have increased the demand for low-cost grease-resistant packaging materials worldwide. Taking into account the global ... -
Removal of xylan from birch kraft pulps and the effect of its removal on fiber properties, colloidal interactions and retention in papermaking
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 30.11.2017)The aim of this study was to investigate the effects of xylan removal on characteristics of bleached birch kraft pulps and on the behavior of such modified pulps in a papermaking process, particularly from the chemical ... -
Simulation and optimization tools in paper machine concept design
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 16.11.2012)The last decade has shown that the global paper industry needs new processes and products in order to reassert its position in the industry. As the paper markets in Western Europe and North America have stabilized, the ... -
The effect of cationic-anionic polyelectrolyte multilayer surface treatment on inkjet ink spreading and print quality
Acta Universitatis Lappeenrantaensis (Lappeenranta University of Technology, 10.12.2015)The focus of the work reported in this thesis was to study and to clarify the effect of polyelectrolyte multilayer surface treatment on inkjet ink spreading, absorption and print quality. Surface sizing with a size press, ...
