Novel Analysis Method for Pulp Furnish Using Tube Flow Fractionator (Part 1)

Fukuoka, Moe; Goto, Shisei; Ohtake, Hiroki

doi:10.2524/jtappij.69.432

Cited by 1 publication

(3 citation statements)

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“…The average fiber width in each fraction was determined from photographs using the Valmet IMG software (Ver. IMG75467, Valmet, Espoo, Finland) (Laitinen 2011;Laitinen et al 2011;Fukuoka et al 2015aFukuoka et al , 2015bJagiello et al 2016;Karinkanta and Laitinen 2017). The fractionation experiments were performed four times for each sample.…”

Section: Tff Classificationmentioning

confidence: 99%

“…The CaCO3 content of the solid component in each fraction was determined according to the standard incineration method JIS P 8251 (2003). (Fukuoka et al 2015a(Fukuoka et al , 2015bLaitinen 2011;Laitinen et al 2011;Jagiello et al 2016) HBKP fibers and fiber aggregates. Individual HBKP fibers of approximately 1 mm in length were present in Fr.…”

Section: Analysesmentioning

confidence: 99%

“…Based on the TFF principle, an approximately 50 mL slurry that contained long and short fibers and fines was quickly separated into five fractions according to the hydrodynamic size of the components. The TFF system has been applied to various pulp fibers, recycled pulp fibers with residual inks, and wood powders to separate the components according to their hydrodynamic sizes (Laitinen 2011;Laitinen et al 2011;Fukuoka et al 2015aFukuoka et al , 2015bJagiello et al 2016;Karinkanta and Laitinen 2017). Fukuoka et al (2015b) studied the distributions of residual ink particles in recycled pulp fibers and hydrophobic colloidal substances by TFF.…”

Section: Introductionmentioning

confidence: 99%

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Structural analysis of CaCO3 nanoparticle/pulp fiber composites by tube flow fractionation

Fuchise-Fukuoka

Goto

Isogai

2020

BioRes

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Two slurries that consisted of precipitated calcium carbonate (CaCO3) nanoparticles and unbeaten hardwood bleached kraft pulp (HBKP) were prepared via ultrafine bubble and mixing methods. In the ultrafine bubble method, a CO2 gas flow was bubbled into a HBKP slurry that contained Ca(OH)2 to prepare a precipitated CaCO3/HBKP composite slurry. The HBKP/water and precipitated CaCO3/water slurries were prepared separately and mixed to prepare a precipitated CaCO3/HBKP mixture slurry. Each of the two CaCO3/HBKP slurries was separated into five fractions using a tube flow fractionation (TFF) system. The first and second fractions consisted of long HBKP fibers and fiber aggregates. The third fraction had the highest mass ratio of the components in the five fractions, and it had approximately 1-mm-long HBKP fibers. The fourth fraction contained primarily HBKP short fibers and CaCO3 aggregates. Thus, the CaCO3/HBKP components in the slurry were separated adequately by TFF, depending on their hydrodynamic sizes. The average width of each fraction in the CaCO3/HBKP composite slurry was always larger than that of the corresponding fraction from the CaCO3/HBKP mixture slurry, which indicated that precipitated CaCO3 nanoparticles and their aggregates attached stably to long and short pulp fiber surfaces in the composite slurry.

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