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Items for "refining"

Vapor-phase diethyl oxalate pretreatment of wood chips: Part 1. Energy savings and improved pulps

Diethyl oxalate (DEO) was injected into a digester containing wood chips (pine, spruce, or aspen) preheated to 130–140°C and held for 30 min at the same temperature...

Keywords: energy savings, ester, mechanical, Oxalate, oxalic, refining, thermomechanical, vapor phase

05/2007 | Holzforschung, Walter de Gruyter

Deformation behavior of wet lignocellulosic fibers

The deformation behavior of wet lignocellulosic fibers was examined by applying a dilute suspension of dyed pulp fibers to a filter paper and then wet pressing the fibers onto glass slides...

Keywords: bleached kraft pulp, deformability, fiber crossing, flexibility, refining, single fiber, unbleached kraft pulp, wet pressing

05/2007 | Holzforschung, Walter de Gruyter

Alkaline peroxide treatment of ECF bleached softwood kraft pulps: Part 2. Effect of increased fiber charge on refining, wet-end application, and hornification

The effect of increased fiber charge on refining, cationic starch adsorption, and hornification was examined...

Keywords: atomic force microscopy, carboxyl, cationic starch, drying, fiber charge, hornification, peroxide, refining, tensile, wet-end

06/2007 | Holzforschung, Walter de Gruyter

Cellulose microfibrils: A novel method of preparation using high shear refining and cryocrushing

This paper describes a novel technique to produce cellulose microfibrils through mechanical methods...

Keywords: aspect ratio, cryocrushing, high shear, microfibril, refining

01/2005 | Holzforschung, Walter de Gruyter

Characterization of thin water layers in pulp by tritium exchange. Part 2: Effect of refining on water absorption

The surface area of pulp increases upon refining, which also increases the quantity of bound water...

Keywords: bound water, confined water, fiber, Hydrogen bond, Isotope exchange, refining, SEM, surface area, Tritium

03/2007 | Holzforschung, Walter de Gruyter

Ultrastructural changes in a holocellulose pulp revealed by enzymes, thermoporosimetry and atomic force microscopy

To increase our knowledge of the ultrastructure within softwood fibres, enzymatic treatment, thermoporosimetry, light microscopy, and atomic force microscopy with image analysis were used to investigate the structure of holocellulose softwood pulp fibres...

Keywords: atomic force microscopy, cell wall, cellulose, drying, enzyme, fibril, hemicellulases, hemicellulose, holocellulose, Norwegian spruce, Picea abies, pores, pore size, pore volume, refining, ultrastructure

11/2005 | Holzforschung, Walter de Gruyter

Characterisation of fines from unbleached kraft pulps and their impact on sheet properties

Fines are an essential component in the papermaking process because they have a profound influence on the behaviour of the wet web and on the mechanical properties of the final sheet...

Keywords: charged groups, fines, kraft pulp, mechanical properties, refining

09/2008 | Holzforschung, Walter de Gruyter

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