Accueil Sciences et Innovations Sciences Distribution of optical brightening agent (OBA), in the fibre wall of high-yield and kraft pulps

Distribution of optical brightening agent (OBA), in the fibre wall of high-yield and kraft pulps

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Article technique paru dans J-FOR* Vol.1, No1, 2011 (Disponible en anglais seulement)

RÉSUMÉ

An aspen High-yield pulp (HYP) was fractionated and processed with Optical Brightening Agents (OBA), and their UV fluorescent images were taken using the fluorescence microscopy technique. The results were compared with those from a hardwood Kraft pulp. At a same OBA charge, the fluorescent intensity of OBA-treated Kraft pulp was stronger than that of the OBA-treated HYP. Interestingly, for the aspen HYP, the OBA diffusion occurred from both the fibre surface inward, and the lumen outward, while for the Kraft pulp, the OBA diffusion occurred mainly from the fibre surface inward. The difference between mechanical and Kraft pulping processes, (mechanical pulping produces open-ended fibres while chemical pulping produces intact fibres), can account for the difference in the OBA diffusion between the HYP and Kraft pulp.

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AUTEURS :

ART3-auteur1 ART3-auteur2 ART3-auteur3 ART3-auteur4-5-6
Y. ZHANG
Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, NB, Canada
Y. NI
Limerick Pulp and Paper Centre, University of New Brunswick, Fredericton, NB, Canada
 D. WONG
FPInnovations -
Paprican Division,
Pointe-Claire, QC,
Canada

* J-FOR - The Journal of Science & Technology for Forest Products and Processes, est une publication phare de PAPTAC, comprenant des articles évalués de haute qualité, traitant de technologie et de science relativement à des domaines traditionnels et émergents propres à l'industrie forestière.

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