Behavior of Eucalyptus Wood Xylans across Kraft Cooking

Magaton, Andréia S.; Colodette, Jorge Luiz; Piló‐Veloso, Dorila; Gomide, José Lívio

doi:10.1080/02773813.2010.484123

Cited by 22 publications

(20 citation statements)

References 18 publications

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“…The O-acetyl-4-O-methyly glucuronoxylans present in hardwoods are substituted by 4-O-methyl glucuronic acid (MeGlcA) and acetyl groups at a ratio of 1:7:10 to xylose (Magaton, Colodette, Pilo-Veloso, & Gomide, 2011;Spiridon & Popa, 2008;Teleman, Tenkanen, Jacobs, & Dahlman, 2002). The predominant hemicellulose in grasses is arabinoglucuronoxylan, which is substituted with arabinose side chains at a ratio of 1.3:2:10 to MeGlcA and xylose (Evtuguin, Tomas, Silva, & Neto, 2003;Izydorczyk & Dexter, 2008;Westbye, Köhnke, Glasser, & Gatenholm, 2007).…”

Section: Introductionmentioning

confidence: 99%

Modifying solubility of polymeric xylan extracted from Eucalyptus grandis and sugarcane bagasse by suitable side chain removing enzymes

Gomes

Chimphango

Görgens

2015

Carbohydrate Polymers

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Section: Introductionmentioning

confidence: 99%

Modifying solubility of polymeric xylan extracted from Eucalyptus grandis and sugarcane bagasse by suitable side chain removing enzymes

Gomes

Chimphango

Görgens

2015

Carbohydrate Polymers

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“…"Charge demand in papermaking," BioResources 7(4), 6109-6193. 6117 1996; Larnicol et al 2001;He et al 2004), various dissolved substances of lignin and hemicelluloses present in black liquor (Silvestre et al 2000;Sjöholm et al 2000;Lisboa et al 2005;Ribe et al 2010;Jansson and Brännvall 2011;Magaton et al 2011), wood resin, and various binders and dispersants in coating formations that happen to get repulped and sent back to the paper machine system (Järnström 1993;Rantala et al 1999;Nikkinen et al 2001;Monte et al 2011). Thornton et al 1994a;Sundberg et al 2000a;He et al 2004;Pranovich et al 2003;Pruszynski et al 2011 Chemimechanical pulping and bleaching (CTMP, APMP, etc.)…”

Section: Experimental Approachmentioning

confidence: 99%

“…Spent liquor from the kraft pulping process also contains components that can contribute significantly to cationic demand (Alber et al 1998;Bikova et al 2000;Vu et al 2003;Lisboa et al 2005;Neto et al 1999;Sjöholm et al 2000;Rautiainen and Alén 2010;Jansson and Brännvall 2011;Magaton et al 2011). Even though kraft pulping systems invariably employ devices called brown-stock washers to remove black liquor from the pulp before it arrives at the paper machine system, the washing process is never 100% complete (Hart 2011;Pacheco et al 2006).…”

Section: Black Liquor Carry-overmentioning

confidence: 99%

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Dissolved and Colloidal Substances (Dcs) and the Charge Demand of Papermaking Process Waters and Suspensions: A Review

et al. 2012

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Dissolved and colloidal substances (DCS) in the process waters of paper machine systems can interfere with the retention of fine particles, retard the drainage of water from the wet web, and generally hurt the intended functions of various polyelectrolytes that are added to the process. This review considers publications that have attempted to characterize the nature and effects of different DCS fractions, in addition to some of the ways that paper technologists have attempted to overcome related problems. The consequences of DCS in a paper machine system can be traced to their ability to form complexes with various polyelectrolytes. Such tendencies can be understood based on a relatively strong complexing ability of multivalent materials, depending on the macromolecular size and charge density. Continuing research is needed to more fully understand the different contributions to cationic demand in various paper machine systems and to find more efficient means of dealing with DCS.

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“…However, the ratio of glucuronic acid to xylose units on the xylan that is isolated depends on the extraction method employed and it can be higher for eucalyptus wood (Magaton et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Dual-Polyelectrolyte Adsorption of Poly(allylamine Hydrochloride) and Xylan Onto Recycled Unbleached Kraft Pulps

Galván¹,

Mocchiutti²,

Cornaglia³

et al. 2012

BioResources

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The effects of a double polyelectrolyte adsorption of poly(allylamine hydrochloride) (PAH) and xylan (Xyl) on a recycled unbleached softwood kraft pulp were studied. The kinetics of PAH adsorption on this pulp was analyzed by building adsorption isotherms and by estimating the surface nitrogen adsorbed through the X-ray photoelectron spectroscopy (XPS) technique. It was found that at pH 7.5, 0.01N NaCl, and short adsorption time, PAH is mainly adsorbed on the fiber surface. Adsorption isotherms of xylan on untreated and on previously PAH-treated pulps at different ionic strengths were built, and the effects of the amount of PAH on xylan adsorption were considered. It was found that when ionic strength was lower than 0.01N NaCl, a PAH pretreatment was necessary to achieve high levels of xylan adsorption at room temperature and short adsorption times. Nevertheless, when ionic strength was 0.1N NaCl, 0.3% xylan on pulp could be directly adsorbed on untreated pulp. Finally, it is shown that the dual-polyelectrolyte adsorption on this pulp is a feasible technique for improving paper tensile strength.

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Behavior of Eucalyptus Wood Xylans across Kraft Cooking

Cited by 22 publications

References 18 publications

Modifying solubility of polymeric xylan extracted from Eucalyptus grandis and sugarcane bagasse by suitable side chain removing enzymes

Modifying solubility of polymeric xylan extracted from Eucalyptus grandis and sugarcane bagasse by suitable side chain removing enzymes

Dissolved and Colloidal Substances (Dcs) and the Charge Demand of Papermaking Process Waters and Suspensions: A Review

Dual-Polyelectrolyte Adsorption of Poly(allylamine Hydrochloride) and Xylan Onto Recycled Unbleached Kraft Pulps

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