Title:
An Isotopic Study of Fiber-Water Interactions

dc.contributor.advisor Banerjee, Sujit
dc.contributor.author Walsh, Frances Luella en_US
dc.contributor.committeeMember Deng, Yulin
dc.contributor.committeeMember Patterson, Timothy
dc.contributor.committeeMember Rojas, Orlando
dc.contributor.committeeMember Teja, Amyn
dc.contributor.department Chemical Engineering en_US
dc.date.accessioned 2007-03-27T18:06:45Z
dc.date.available 2007-03-27T18:06:45Z
dc.date.issued 2006-08-04 en_US
dc.description.abstract A new technique for measuring the water content of fiber is presented. Tritiated water is added to a pulp/water suspension whereupon the tritium partitions between the bulk water and the pulp. Through this technique a fiber:water partition coefficient is developed, Kpw. This thesis will cover the development of the Kpw procedure and three different case studies. The first study involves comparing Kpw to traditional methods of fiber water content. The procedure provides a value of ten percent for the tightly bound water content of unrefined hardwood or softwood kraft fiber, either bleached or unbleached. If this water is assumed to cover the fiber surface as a monolayer, then an estimate of the wet surface area of fiber can be obtained. This estimate compares well to independent measurements of surface area. Kpw has also been found to be valuable in furthering the understanding of refining. Based on the study, it is proposed that refining occurs in three discrete stages. First, refining removes the primary cell wall and S1 layer while beginning to swell the S2 layer. Next, internal delamination occurs within the S2 layer. Finally, fiber destruction occurs at high refining levels. By using Kpw, the three stages of refining are clearly recognized. Lastly, Kpw is used to study the effect of hornification on bleached softwood kraft fiber. The recycling effects at three refining levels were characterized by Kpw and followed closely the findings of the refining study. At low and high refining levels, the impact of recycling was minimal according to Kpw results, but at 400 mL csf the impact of recycling was much more pronounced. This could be attributed to the closing of internal delaminations within the fiber. en_US
dc.description.degree Ph.D. en_US
dc.format.extent 2799164 bytes
dc.format.mimetype application/pdf
dc.identifier.uri http://hdl.handle.net/1853/13973
dc.language.iso en_US
dc.publisher Georgia Institute of Technology en_US
dc.subject Hornification en_US
dc.subject Refining en_US
dc.subject Bound water en_US
dc.subject Pulp fibers en_US
dc.subject Isotopes en_US
dc.subject.lcsh Water Measurement en_US
dc.subject.lcsh Wood-pulp Analysis en_US
dc.subject.lcsh Fibers Analysis en_US
dc.title An Isotopic Study of Fiber-Water Interactions en_US
dc.type Text
dc.type.genre Dissertation
dspace.entity.type Publication
local.contributor.advisor Banerjee, Sujit
local.contributor.corporatename School of Chemical and Biomolecular Engineering
local.contributor.corporatename College of Engineering
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relation.isOrgUnitOfPublication 7c022d60-21d5-497c-b552-95e489a06569
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