Effects of Alkali Swelling and Beating Treatments on Properties of Kraft Pulp Fibers

Choi, Kyoung-Hwa; Kim, Ah Ram; Cho, Byoung-Uk

doi:10.15376/biores.11.2.3769-3782

Cited by 33 publications

(7 citation statements)

References 9 publications

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“…If the moisture content increases, bonding strength decreased, but the fiber flexibility improves. Although the flexibility has a small impact on the tensile and bursting strength, the increasing fiber flexibility decreases the tensile and bursting strength (Nissan 1977;Lund et al 2012;Choi et al 2016).…”

Section: Effect Of Pulping Factors On Folding Endurancementioning

confidence: 99%

Soda-anthraquinone pulping optimization of oil palm empty fruit bunch

Hassan

Mohammad

Ibrahim

et al. 2020

BioRes

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The influence of soda-anthraquinone (AQ) pulping conditions on paper properties of oil palm empty fruit bunches was studied using Response Surface Methodology (RSM) based on Central Composite Design (CCD). The alkali charge, NaOH (A), pulping temperature (T), and pulping time (t) ranged between 20 and 30%, 160 and 180 °C, and 60 and 120 minutes, respectively. The mechanical properties evaluated for the handsheets produced were the tensile index, tearing index, bursting index, folding endurance, zero-span tensile strength, and the optical properties (brightness and opacity). The effects of soda-AQ pulping conditions on oil palm empty fruit bunch paper were elucidated by the regression models obtained. The optimum pulping condition were at 27.3% alkali charge, 160 °C, and 60 min that produced paper properties with 26.8 N.m/g tensile index, 7.95 mN.m2/g tearing index, 5.32 kPa.m2/g bursting index, 1.70 log10 folding endurance, 46.2 N zero-span tensile strength, 51.8% brightness, and 95.8% opacity.

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Section: Effect Of Pulping Factors On Folding Endurancementioning

confidence: 99%

Soda-anthraquinone pulping optimization of oil palm empty fruit bunch

Hassan

Mohammad

Ibrahim

et al. 2020

BioRes

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“…Therefore, the pulp fibers and fines after intense beating can retain more water and possibly adhere to more filler particles with increasing intensity of beating. A high beating intensity is purposely applied to produce high yield pulp fibers with a high degree of defibrillation and fine break‐off in comparison to other types of pulp fibers . The water retention of the pulp fibers is a property which depends on the degree of refinement and influences the paper retention and flocculation.…”

Section: Design and Manufacturing Of Highly Filled Papersmentioning

confidence: 99%

Highly Filled Papers, on their Manufacturing, Processing, and Applications

et al. 2019

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Since more than a decade ago, the research on highly filled papers, as well as paper-derived inorganic materials, has greatly intensified. As presented in this review, highly filled papers as preforms allow for the design of porous or dense, multilayered, and geometrically complex structures. These paperderived ceramic-or metal-based materials are generated by the heattreatment of highly filled papers. Paper-derived materials are potential materials of choice for applications in transportation, energy-generation, environmental conservation, support structures, medical uses, and electronic components. Due to the adjustability of the filler content and the good machinability of highly filled papers, paper-derived sheets or multilayers may include intricate structures and tailored gradients in phase structure or porosity. Paper-derived multilayers also may contain cast ceramic tapes or other functionalized layers, as presented in some examples. Computer-aided manufacturing processes for paper-derived materials can be supplemented by prediction models for the sintering shrinkage in order to identify optimal post-processing steps, stacking orders and orientations for highly filled paper layers within multilayer green bodies. The accuracy of established component-level sintering models can be significantly increased by microstructure models of the highly filled paper. ParameterName Unit α Mismatch parameter for fiber cross-sections, Equation (5) Dimensionless α p Layer position in viscoelastic paper structure model, Equation (2) Dimensionless A 0 Initial amplitude of perturbation, Equations (15) 10 À6 m A(f) Parameter for evolution of instantaneous carbon conversion rate, Equation (7) Dimensionless A diff Source controlled diffusion parameter, Equations (9) 10 À7 N A match Modeling parameter, Equations (8) Dimensionless a Inter-particle contact-area radius, Equations (19) 10 À8 m a Local average pore area, Equation (4) 10 À6 m 2 b Pore geometry constant, Equation (20) Dimensionless ß evo , m evo Empirical constants for grain evolution in SOVS model, Equation (8) Dimensionless ß r(c)p Proportionality constant for bimodal packing fraction determination, Equation (18) Dimensionless C Modeling constant for debindering pressure calculation, Equation (7) 10 À6 (m 2 Á s)/K C 1 , C 2 , C 3 , C 4 , C 5 Parameters in the Riedel model that are determined by the dihedral angle, Equations (9) Dimensionless c glue Heat capacity of the adhesive layers, Equation (3) 10 À6 s c L , c s Volume fraction of larger-sized/smaller-sized particles in a multimodal mixture of particles, Equation (17)and (18) 10 0 vol% c vol Volume concentration of pulp fibers, Equation (4) 10 0 vol% γ, γ 0 Strain relaxation rate of calendered paper with initial value, Equation (2) Dimensionless γ B Grain boundary energy density, Equation (13) 10 0 J m À2 γ b Specific energy for grain boundary diffusion, Equation (9) 10 3 J mol À1 γ S Material surface energy, Equation (8, 11, and 13) 10 0 J m À2 Δ Half of the inter-particle boundary thickness, Equation (19) 10 À8...

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“…4a and 5a. During the A treatment, the pulp fibers were severely fibrillated, which may be due to the fact that the alkali treatment was highly effective in causing swelling of the fibers, thus reducing the damage to the fibers during the mechanical pulping process (Choi et al 2016). During the refining process, the primary and secondary walls were deformed and stripped due to strong external forces, which resulted in the appearance of more fine fiber components (Banavath et al 2011).…”

Section: Fiber Morphologymentioning

confidence: 99%

Staged alkali and hydrogen peroxide treatment of poplar chemi-mechanical pulp

Yu-qian

Tian

et al. 2019

BioRes

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In order to improve the physical properties and brightness of poplar chemi-mechanical pulp, a new staged alkali and hydrogen peroxide treatment method was proposed and applied. Wood chips were impregnated and swelled with an alkali solution and then treated with a hydrogen peroxide bleaching liquor. A thorough evaluation and comparison of the physical properties and brightness of the pulps that underwent different treatment methods was conducted. The results showed that when the pulp was treated with an alkali and hydrogen peroxide treatment method with an alkali dosage of 6% and a hydrogen peroxide dosage of 6%, the tear index was 3.64 mN‧m2/g, the tensile strength was 3.61 kN/m, and the pulp brightness was 67.1% (ISO). The obtained physical properties and brightness of the alkali and hydrogen peroxide method treated pulp were greater than the traditional alkaline hydrogen peroxide method values, as well as the values of any other single treatment methods.

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Effects of Alkali Swelling and Beating Treatments on Properties of Kraft Pulp Fibers

Cited by 33 publications

References 9 publications

Soda-anthraquinone pulping optimization of oil palm empty fruit bunch

Soda-anthraquinone pulping optimization of oil palm empty fruit bunch

Highly Filled Papers, on their Manufacturing, Processing, and Applications

Staged alkali and hydrogen peroxide treatment of poplar chemi-mechanical pulp

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