The use of microfibrillated cellulose produced from kraft pulp as strength enhancer in TMP paper

Eriksen, Øyvind; Syverud, Kristin; Gregersen, Øyvind Weiby

doi:10.3183/npprj-2008-23-03-p299-304

Cited by 256 publications

(156 citation statements)

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“…The application of CNFs as an additive for pulp slurries has been recently assessed as an effective alternative to mechanical beating for improving paper strength (Eriksen et al 2008;Taipale et al 2010;González et al 2012;Brodin et al 2014;. Such studies demonstrated that the addition of CNFs into papermaking slurries effectively increased the tensile strength and rigidity of paper by amounts similar to those achieved with mechanical beating.…”

Section: Introductionmentioning

confidence: 70%

Approaching a Low-Cost Production of Cellulose Nanofibers for Papermaking Applications

Delgado-Aguilar¹,

Tovar²,

Farrés³

et al. 2015

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The use of cellulose nanofibers (CNF) as an additive in papermaking is an attractive alternative to improve paper's strength. However, the costs of CNF production need to be competitive compared to other approaches aimed at reducing mechanical beating. Five different types of CNFs were prepared following different pretreatments: TEMPO-mediated oxidation at basic and neutral conditions, soft acid hydrolysis, enzymatic treatment, and mechanical beating. All of the pretreated fibers were later passed through a high-pressure homogenizer. The resulting CNFs were each applied to a papermaking pulp to investigate their reinforcing ability. Results indicated that the TEMPO-oxidized CNFs offered the highest increase at the same nanofiber content compared to the other types of CNFs. However, an analysis of the cost of increasing paper's breaking length by 75% indicated that TEMPO-oxidized CNFs were more expensive than the other CNF grades, whereas CNFs from mechanical and acid pretreatment offered similar increases at lower prices. The results indicated that CNFs of high fibrillation degree were not necessary to induce dramatic increases in paper strength. This finding offers a new possibility for the escalation of CNF production to industrial levels with competitive prices.

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Section: Introductionmentioning

confidence: 70%

Approaching a Low-Cost Production of Cellulose Nanofibers for Papermaking Applications

Delgado-Aguilar¹,

Tovar²,

Farrés³

et al. 2015

BioResources

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“…Thus, in principle, a more homogenous material with less defects and higher performance can be produced. While laboratory studies (Eriksen et al 2008;González et al 2012;Henriksson et al 2008;Rantanen et al 2013;Subramanian et al 2008) have shown the potential of MFC/NFC-based papers, information on the potential manufacturing strategies is still lacking.…”

Section: Introductionmentioning

confidence: 99%

Forming and Dewatering of a Microfibrillated Cellulose Composite Paper

et al. 2015

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An approach is demonstrated for the manufacturing of a microfibrillated cellulose (MFC) composite paper. A key element in the manufacturing paradigm is the use of high consistency suspensions to improve retention and minimize the need for water removal after forming. The rheological characterization of the composite furnish, which contained 70% structured pigment, 20% MFC, and 10% pulp fibers, revealed a gel-like shear thinning behavior of the suspension, which differs greatly from traditional fiber-based papermaking furnishes. The results from laboratory and pilot scale studies show that the headbox consistency range from 5 to 10% offers the best combination of processing, forming characteristics, retention, and dewatering. While the furnish dewatering in laboratory scale was very problematic, under suitable dynamic conditions the wire section dewatering was excellent. The results of this study suggest that the MFC composite can be manufactured on a modified paper machine and that the final product will have an attractive cost structure.

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“…Mechanical comminution of untreated fibers into a nanomaterial requires 70 to 100 MWh/t, a considerable amount of energy (Turbak et al 1983;Eriksen et al 2008;Saito et al 2009;Siró and Plackett 2010). Two main pathways have been explored to lower the energy input including fiber pretreatments (Henriksson et al 2007b;Saito et al 2007;Tejado et al 2012) and the implementation of novel disintegration techniques (Chatterjee and Makoui 1984;Wang and Sain 2007;Alemdar and Sain 2008).…”

Section: Introductionmentioning

confidence: 99%

Toward Industrially Feasible Methods for Following the Process of Manufacturing Cellulose Nanofibers

Moser¹,

Lindström²,

Henriksson³

2015

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a Nanocellulose is a recently developed form of cellulose that has the potential to be used in many different industries, ranging from food to high-performance applications. This material is commercially manufactured through the homogenization of chemical pulps, but the process is energy-consuming and is still an important subject for development. Simple, robust methods are required for the quality control and optimization of industrial nanocellulose production. In this study, a number of different methods, based on different principles of monitoring the manufacture of cellulose nanofibers were evaluated and compared for five different nanocellulose qualities, both for their resolution and robustness/ease. Methods based on microscopy, light scattering, centrifugation, and viscosity were examined and all appeared useful for observing the manufacturing process during its initial stage. However, only methods based on centrifugation, turbidity, and transmittance yielded reliable data for the entire manufacturing process. Of these methods, transmittance measurement may be the best candidate for routine use because the method is simple, rapid, and only requires spectrophotometer equipment.

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The use of microfibrillated cellulose produced from kraft pulp as strength enhancer in TMP paper

Cited by 256 publications

References 0 publications

Approaching a Low-Cost Production of Cellulose Nanofibers for Papermaking Applications

Approaching a Low-Cost Production of Cellulose Nanofibers for Papermaking Applications

Forming and Dewatering of a Microfibrillated Cellulose Composite Paper

Toward Industrially Feasible Methods for Following the Process of Manufacturing Cellulose Nanofibers

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