Preparation of individualised lignocellulose microfibrils based on thermomechanical pulp and their effect on paper properties

Brodin, Fredrik Wernersson; Eriksen, Øyvind

doi:10.3183/npprj-2015-30-03-p443-451

Cited by 31 publications

(16 citation statements)

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“…The pulp characterization tools have limited resolution and the fines below certain size will not be detected. This fact was previously reported in the literature (Brodin and Eriksen 2014). In this study, we used a constant mass fraction of the fines equal to 3% and varied the diameter of the fines.…”

Section: The Effect Of Fine Diametersupporting

confidence: 54%

Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines

2019

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Refining (i.e., mechanical beating of pulp) is a common procedure that is used in paper-making to improve the mechanical properties of the final product. The improvements caused by refining are mainly attributed to increased density and to a better bonding between fibers. In this work, we study how various mechanisms that can be triggered by refining affect the tensile behavior of the sheets. Consequently, we use direct numerical simulations of fiber networks. We relate our finding to the experimental measurements that we conducted on handsheets. We have found that fibrillar fines with size distributions below the resolution of modern state-of-the art pulp characterization tools have a substantial contribution to the increased strength and stiffness of the sheets.

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Section: The Effect Of Fine Diametersupporting

confidence: 54%

Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines

2019

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“…Tensile index improved for all MFC films produced from TMP and different lignin containing kraft furnish, compared to their original form; however, film prepared from TMP MFC had significantly lower tensile index than the rest. In a different study, Brodin and Eriksen (2015) explored the effects of fractionation and chemical treatment prior to homogenization in producing TMP-based lignocellulose micro-fibrils (LCMF). Tensile index and light scattering of low freeness TMP improved with the addition of all but one LCMF.…”

Section: Introductionmentioning

confidence: 99%

Low consistency refined ligno-cellulose microfibre: an MFC alternative for high bulk, tear and tensile mechanical pulp papers

Jahangir

Olson

2020

Cellulose

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Low consistency (LC) refining of (chemi-) thermomechanical pulp (TMP) provides an energy efficient alternative to high consistency refining for pulp property development. However, the benefit of LC refining is often limited by excessive fibre shortening, lower tear strength and a reduction of bulk caused by the refining process. In this study, microfibres produced by LC refining of TMP and kraft pulp fibres were investigated for their reinforcement potential in high freeness mechanical pulp. Primary pulp at 645 mL Canadian Standard Freeness was LC refined to different energy targets as a baseline for mechanical and optical property development. In contrast, the same primary pulp was reinforced with different microfibre types in ratios that yielded the same specific energies of the baseline LC refined pulp. The study revealed that at equivalent energies, the addition of TMP microfibres to the high freeness primary pulp displayed tensile development identical to the LC refined pulp, with significantly improved tear and bulk. The addition of kraft microfibre to primary pulp produced the highest tensile and tear strength but compromised light scattering. Additionally, all microfibre composites showed improved elongation, as opposed to no notable change in elongation with conventional LC refining. This investigation proposes an alternative, cost-effective approach for developing high bulk, high strength mechanical pulp by limiting the extent of second stage refining and using LC refined microfibres for pulp reinforcement. The high tear-high bulk open construction of the composite paper is likely to benefit boxboard and packaging applications. Keywords Thermomechanical pulp (TMP) Á Microfibrillated cellulose (MFC) Á Low consistency refining (LC) Á Tear index Á Tensile energy absorption (TEA) Á Pulp reinforcement

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“…In recent years, the dependence on paper‐based products especially in packaging had led towards increased interest in improving the quality and properties of conventional papers such as their mechanical strength, writability, and recyclability through the introduction of a renewable and environmentally friendly additive, nanocellulose. This extensive interest can be attributed towards the fascinating properties of nanocellulose such as biodegradability, high aspect ratios, semi‐crystalline nature, excellent intrinsic strength, and modification‐friendly . In order to enhance the competitiveness in the papermaking industry, researchers have been turning into utilizing these “green” nanodimensional additives to confer additional properties to the current state of traditional papers.…”

Section: Introductionmentioning

confidence: 99%

“…Brodin et al . demonstrated that the inclusion of CNF as a reinforcement agent into sulfonated and carboxymethylated cellulose pulps increased the density of the resulting paper, which then improves the tensile strength of paper.…”

Section: Introductionmentioning

confidence: 99%

Surface functionalized nanocellulose as a veritable inclusionary material in contemporary bioinspired applications: A review

Chin

Ting

Ong

et al. 2017

J of Applied Polymer Sci

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The past few decades have seen extraordinary gain in interest for bio-based products, driven by the intensifying call of the society for petrochemical material replacement and developing materials with next-to-no environmental impact. Cellulose, which is an abundantly available "green" material, can be derived from plant fibers and tailored for a plethora of possible uses where it can be used as a substrate or as a filler material. However, emerging technologies and product advancements necessitate the search for materials that are small, biodegradable, lightweight, and strong. Nanocellulose, which can be obtained through as mechanical and chemical production methods with tensile strength and Young's modulus of up to 0.5 and 130 GPa, respectively, proves to be the answer that they were looking for. However, the inherent hydrophilic nature of nanocellulose limited its potential widespread application. Surface modifications of nanocellulose to alter and diminish its hydrophilicity were done to address the aforementioned issues. In this article, we had reviewed on different types of surface modifications and their resulting impact on the properties of nanocellulose and their effect on polymer composites. The importance of nanocellulose in emerging applications such as biosensor, nanoremediation, papermaking, and automotive as well as the current state of the industry and the commercialization progress of nanocellulose were also discussed.

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Preparation of individualised lignocellulose microfibrils based on thermomechanical pulp and their effect on paper properties

Cited by 31 publications

References 0 publications

Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines

Mechanisms of strength and stiffness improvement of paper after PFI refining with a focus on the effect of fines

Low consistency refined ligno-cellulose microfibre: an MFC alternative for high bulk, tear and tensile mechanical pulp papers

Surface functionalized nanocellulose as a veritable inclusionary material in contemporary bioinspired applications: A review

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