Aalto University, P.O. Box 11000, FI-00076 Aalto www.aalto.fi Author Jouko Lehto Name of the doctoral dissertation Reinforcement ability of mechanical pulp fibres Publisher School of Chemical Technology Unit Department of Forest Products Technology Series Aalto University publication series DOCTORAL DISSERTATIONS 47/2011 Field of research Paper and Printing Research Manuscript submitted 2 Novem...

Thermophilic mannanase from the Bacillus sp. MG-33 was applied on wheat straw-rich-soda pulp to evaluate its bleaching potential. Optimum conditions for bio-bleaching of pulp were found as, mannanase 3Ug -1 of pulp at pH 6.5 and temperature 65oC that enhanced the brightness by 30% and reduced the kappa number by 20% within 2h. Tear index (1.1, points) and burst index (0.02, points) were also im...

The effects of the Fenton reagent on recycled unbleached pulp in the absence and presence of a model chemical contaminant, the p-hydroxybenzoic acid (HBA), were studied. In the absence of HBA, the Fenton system clearly modified the chemical and papermaking properties of the pulp. The kappa number was reduced and the specific light absorption coefficient was increased, indicating lignin modifica...

Basic fiber properties can be classified into four categories: Size distribution, shape, structure of the cell wall and the fiber surface. This approach was used when long fiber fractions separated from 10 different mechanical pulps and unrefined and refined chemical pulp samples were compared in order to shed light on the different reinforcing abilities of chemical and mechanical pulp fibers. ...

The influences of pulp type, content of acidic groups (i.e., sulfonic and carboxylic groups) in CTMP, kappa number (i.e., residual lignin content) of unbleached kraft pulp, and beating degree of bleached kraft pulp on the conductivity of polyaniline (PAn)-coated conductive paper were investigated. The amounts of PAn coated on chemical pulps were higher than those coated on high yield pulps, and...

in this study , the physical and mechanical properties of polypropylene composites reinforced with bagasse alkaline-sulfite-anthraquinone, soda-anthraqouinone, monoethanolamine-anthraquinone chemical pulps and mechanical pulp (cmp) known as pulp-plastic compostes (ppc) were investigated and the results were compared among ppcs and with polypropylene composites reinforced with bagasse flour know...

Burfi is a popular khoa based confection and its contains considerable amount of milk solids. The manufacture of value added products by using vegetable like elephant foot yam. The present investigation shows that, the overall acceptability of the elephant foot yam pulp burfi prepared with 10 percent elephant foot yam pulp in treatment T2 (23.65 )was highest and superior. Treatment T2 was more ...

EXPERIMENTAL A softwood (mainly spruce) bleached kraft pulp (SWBKP), and a hardwood (eucalyptus) bleached kraft pulp (HWBKP) were refined in a PFI mill to 470 and 490 ml CSF freeness, respectively. Three grades of commercial aspen high-yield pulp (325/85, 325/83, 250/80) were obtained from Tembec Inc., without further refining treatment. The properties of the pulp samples are listed in Table I....