Study on the modification of bleached eucalyptus kraft pulp using birch xylan

Han, Wei; Zhao, Chuanshan; Elder, Thomas; Chen, Kefu; Yang, Rendang; Kim, Dongho; Pu, Yunqiao; Hsieh, Jeffery S.; Ragauskas, Arthur J.

doi:10.1016/j.carbpol.2012.01.025

Cited by 30 publications

(17 citation statements)

References 20 publications

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“…This finding suggests that partial removal of hemicelluloses from pulps leads to worse paper strength properties. Also Han et al (2012) reported that supplementation of cellulosic pulp with birch xylan improved the strength properties but the changes were only around 5-7% with an exception of the burst index which was improved by 10-12%. This study showed that the smallest decrease in the hemicellulose content (from around 3.5-3.0% d.w.) in the bleached pine pulp, which was caused by the pure xylanase from N. patriciarum, resulted in the most acceptable pulp and paper properties.…”

Section: Discussionmentioning

confidence: 99%

Effect of xylanases on refining process and kraft pulp properties

et al. 2017

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Results of this study demonstrate that enzymatic pretreatment of pulps enables energy savings in the refining process. Pretreatments of NBSK pulp with 3 different commercial xylanases resulted in a faster increase in the pulp freeness that reduced energy input for refining. The partial xylan removal by these enzymes affected the properties of cellulosic pulp and paper. The tensile properties of paper were improved by pretreatment with a pure xylanase while the additional activity of cellulases in the other two tested enzymes negatively influenced the tear resistance. Only the pure xylanase improved the pulp and paper properties. The results of this study provide evidence that the purity of xylanases used in papermaking is of great importance and may decide of paper quality and production costs.

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Section: Discussionmentioning

confidence: 99%

Effect of xylanases on refining process and kraft pulp properties

et al. 2017

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“…Another option to consider is the addition of hemicellulose to fiber stock before refining of the fibers (Lima et al 2003;Han et al 2012). Such practices are consistent with the traditional use of "beater adhesives," especially in the years before development of cationic wet-strength agents capable of adsorbing efficiently on the fiber surfaces (Swanson 1950).…”

Section: Application Strategies For Dry-strength Additivesmentioning

confidence: 97%

“…Thus, it makes sense to consider what would happen if hemicellulose, either in its extracted form or after modifications, were added to kraft pulp fibers -whether or not those fibers had been subjected to pre-extraction. In general, studies have shown that addition of hemicellulose products to the fiber slurry tends to increase the strength of the resulting paper (Mobarak et al 1973;Bhaduri et al 1995;Denis et al 2003;Lima et al 2003;Suurnäkki et al 2003;Ahrenstedt et al 2008;Zhang and Hu 2010;Han et al 2012;Bigand et al 2013;Lindqvist et al 2013;Hubbe 2013, 2014). Lima et al (2003) reported steeply rising dry strength upon addition of unmodified seed-derived xyloglucan to eucalyptus kraft fibers as the dosage was increased in the range zero to about 1% in the absence of any retention aid.…”

Section: Application Strategies For Dry-strength Additivesmentioning

confidence: 99%

Prospects for Maintaining Strength of Paper and Paperboard Products While Using Less Forest Resources: A Review

Hubbe¹

2013

BioResources

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Paper production requires large amounts of cellulosic fiber, whereas the world's forested lands and croplands have a finite capacity to supply such resources. To deal with likely future pressure on forest resources, as well as to hold down costs of materials, publications examined in the preparation of this review suggest that the paper industry will need to implement several concurrent strategies. In particular, the industry can be expected to view recycling as a central part of its activities. Basis weights of various paper-based products can be expected to decrease over the coming decades, and more of the fiber content will be replaced with fillers such as calcium carbonate. Such trends will place intense demands upon chemical-based strategies to enhance the bonding within paper and paperboard. Based on the literature, further progress in reducing the amount of new forest resources used to meet a given set of paper product requirements will require a combined approach, taking into account various fiber attributes, nanostructures, novel concepts in bond formation, and advances in the unit operations of papermaking.

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“…The C2/C3 ratios of XPS data related to the fibers' surface coverage with xylan corroborates the higher tensile indices of the kraft pulps (Table 4). Xylan is extremely important for fiber bonding and pulp mechanical properties (Sihtola and Blomberg 1975;Schönberg et al 2001;Sjöberg et al 2002;Kataja-aho et al 2011;Muguet et al 2011;Schwikal et al 2011;Silva et al 2011;Han et al 2012). The ionic carboxylate groups of xylans increase the swelling of fibers.…”

Section: Fiber Morphology and Mechanical Propertiesmentioning

confidence: 98%

Pulping-tailored fiber properties from a novel Brazilian Eucalyptus hybrid

et al. 2013

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The chemical composition and morphology of pulp fibers have a significant impact on the properties of fiber products. Pulp samples from a novel unique Eucalyptus triple hybrid [Eucalyptus grandis × (Eucalyptus urophylla × Eucalyptus globulus)] were obtained by various pulping processes -kraft, soda-anthraquinone (NaOH-AQ), and thermomechanical pulping (TMP). The chemical composition of the fiber surfaces was evaluated by X-ray photoelectron spectroscopy (XPS). The surface lignin content of NaOH-AQ pulp fibers was lower than that of the kraft counterpart. However, kraft pulp handsheets showed better physical and mechanical properties. XPS data strongly suggests that together with the pulp bulk chemical composition the xylan is more abundant on the surface of kraft fibers, which is reflected on their better mechanical properties. Moreover, the relatively low surface lignin content in TMP pulp compared to wood suggests that defibration takes place in the secondary wall, where lignin is less concentrated.

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Study on the modification of bleached eucalyptus kraft pulp using birch xylan

Cited by 30 publications

References 20 publications

Effect of xylanases on refining process and kraft pulp properties

Effect of xylanases on refining process and kraft pulp properties

Prospects for Maintaining Strength of Paper and Paperboard Products While Using Less Forest Resources: A Review

Pulping-tailored fiber properties from a novel Brazilian Eucalyptus hybrid

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