Studies on strength delivery and related fields have so far concentrated on finding the locations in the mill where fibres are damaged and what the damages consist of. However, fibres will invariably encounter mechanical stresses along the fibreline and in this thesis a new concept is introduced; the vulnerability of fibres to mechanical treatment. It is hypothesised that fibres with different ...

Pulping using organic solvents is an alternative to kraft pulping and can reduce environmental pollutants. Ethanol a potential cooking liquor, as it improves the penetration of chemical due its low surface tension, be recovered via distillation. The structure alpha-cellulose content need controlled during bleaching processes prepare dissolving pulp. Therefore, effect ethanol on efficiency caust...

Dental materials in general are tested in different animal models prior to the clinical use in humans, except for bleaching agents. Objectives To evaluate an experimental rat model for comparative studies of bleaching agents, by investigating the influence of different concentrations and application times of H2O2 gel in the pulp tissue during in-office bleaching of rats' vital teeth. Material a...

Abstract In this work, we produced composites of mesoporous silica synthesized in-situ on never-dried bleached eucalyptus kraft pulp fibers with the aim providing cost-effective depth filters, having high flux, and adsorptivity. The loading for samples was in range 12–35 wt%. performance double-layer membranes studied adsorption charged molecules. best nanofibrillated cellulose-pulp-mesoporous ...

Eucalyptus sp. is the most important planted crop for production of chemical pulp. This pulp mostly bleached with chlorine dioxide, which produces hypochlorous acid in situ when reacting lignin. However, applying hypochlorus directly not practiced, even though it contributes significantly to bleaching reactions. Therefore, this article presents as main oxygen delignified kraft The results showe...