Fiber properties of eucalyptus kraft pulp with different carboxyl group contents

Chen, Yangmei; Wan, Jinquan; Dong, Xinfa; Ma, Yuanyuan

doi:10.1007/s10570-013-0055-8

Cited by 36 publications

(12 citation statements)

References 14 publications

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“…(Chen et al 2013;Hii et al 2012;Koskenhely et al 2005). As swelling is influenced by structural changes and pulp chemistry, the effect of different pulp treatments can be monitored by its characterization and thus swelling yields important information regarding, e.g., dewaterability on the paper machine or strength development after sheet consolidation.…”

Section: Introductionmentioning

confidence: 99%

“…The swelling behavior influenced by the pulping process and yield (Andreasson et al 2003;Forsstrom et al 2005;Stone and Scallan 1967), by drying and rewetting (Stone et al 1968;Wang 2006) and by refining (Bäckström and Haimnar 2010;Laivins and Scallan 1996) have been documented. Further, swelling is influenced by enzymatic treatment (Gil et al 2009;Stock et al 1995), by chemical modification (Chen et al 2013;Racz and Borsa 1997;Scallan 1983;Zhao et al 2016) or by addition of cationic polymers (Aarne et al 2012;Strom and Kunnas 1991). Swelling depends to a certain extent, also, on charge density.…”

Section: Introductionmentioning

confidence: 99%

“…For example, carboxymethylation of unbleached hardwood kraft pulp (UBHK) leading to a 280 leq/g higher total fiber charge resulted in an increased WRV of 1.4 g water per g fiber (Chen et al 2013), while the fiber morphology remained almost unchanged. Refining, on the other hand, has little effect on the fiber total charge (Horvath and Lindström 2007), but generates fines (particles passing a 200 mesh screen), or more precisely, secondary fines (Krogerus et al 2002).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A novel approach to determining the contribution of the fiber and fines fraction to the water retention value (WRV) of chemical and mechanical pulps

Mayr

Eckhart

Winter³

et al. 2017

Cellulose

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The swelling behavior of pulp fibers has a significant influence on process and product properties. The water uptake of fibers is controlled by a different mechanism. While fiber charge is a driving factor for swelling, the swelling is hindered by the solid structure of the fiber wall. In the case of the fines fraction of pulps, this structure is broken to some extent and the fines are able to swell two to three times more compared to fibers. Thus fines are an important factor regarding the swelling behavior and water retention of pulps, although, at least for chemical pulp, their mass fraction is only between 4 and 15%. For this reason, it is of interest to investigate not just the swelling behavior of pulps, but also of the fiber and fines fractions separately. Swelling is often characterized using the water retention value (WRV) based on a centrifugation technique. WRV measurement is a standardized method for the measurement of the amount of water retained in a given pulp sample. For fine cellulosic materials the standardized procedure cannot be performed. Thus, various modifications of the standard method have been applied by different groups for the evaluation of these materials. Due to these modifications the values obtained cannot be related to the standardized method. In this work a novel approach to determining the WRV of the fines fraction in a given pulp based on the standard procedure will be presented. This allows a quantitative investigation of the contribution of the fibers and fines fraction to the WRV of any given pulp sample.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A novel approach to determining the contribution of the fiber and fines fraction to the water retention value (WRV) of chemical and mechanical pulps

Mayr

Eckhart

Winter³

et al. 2017

Cellulose

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“…[ 49 ] The hydrophilic carboxyl group in the fiber interacts with water and enables fibers to absorb more water to increase swelling capacity, important for the tissue paper industry. [ 50 ] The presence of greater numbers of carboxyl groups and surface charge in the fiber facilitates better entanglement by inducing hydrogen bonding to increase the tensile and burst properties of the fibers. [ 44,51 ] The carboxyl groups act as binding sites and also enables controlled chemical loading and release by regulating the interactions between the carboxyl group and chemicals.…”

Section: Resultsmentioning

confidence: 99%

Lignocellulosic Fibers from Renewable Resources Using Green Chemistry for a Circular Economy

et al. 2020

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The sustainable development of lignocellulose fibers exhibits significant potential to supplant synthetic polymer feedstocks and offers a global platform for generating sustainable packaging, bioplastics, sanitary towels, wipes, and related products. The current research explores the dynamics of fiber production from wood, non‐wood, and agro‐residues using carbonate hydrolysis and a mild kraft process without bleaching agents. With respect to carbonate hydrolysis, high yield, and good coarseness fibers are attained using a simple, low‐cost, and ecofriendly process. Fibers produced using a mild kraft process have lower Klason lignin, carboxyl content, surface charges, and higher fiber length, and crystallinity. Eucalyptus fibers show the highest crystallinity while softwood carbonate fibers show the lowest crystallinity. Hemp hurd fibers contain the highest concentration of hard‐to‐remove water, and thus, suffer maximum flattening visualized by the microscopic images. The relatively high yield sustainable fibers with versatile properties can provide a significant economic benefit since fiber is the dominant cost for producing various bioproducts to meet society's current and future needs.

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“…Monochloroacetic acid carboxymethylation of cellulose has been investigated extensively as a means to increase the absorbent property of wood pulp and cotton celluloses [18]- [21]. Monochloroacetic acid was chosen for its low cost, convenience, safe handling ability and solubility in polar solvents including isopropanol and water.…”

Section: Resultsmentioning

confidence: 99%

Absorbent Properties of Carboxymethylated Fiber, Hydroentangled Nonwoven and Regenerated Cellulose: A Comparative Study

Easson

Villalpando

Condon

2017

Journal of Engineered Fibers and Fabrics

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Commercially-available, bleached cotton fibers, rayon, and their hydroentangled counterparts were carboxymethylated to produce cellulosic products with increased absorbency. These cellulose materials were tested for absorbance, spectroscopic properties, degree of substitution and carding ability. Carboxymethylated fibers and hydroentangled webs exhibited increased water retention as the degree of substitution increased before losing fiber integrity and carding ability. AUTHORS' ADDRESSES

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Fiber properties of eucalyptus kraft pulp with different carboxyl group contents

Cited by 36 publications

References 14 publications

A novel approach to determining the contribution of the fiber and fines fraction to the water retention value (WRV) of chemical and mechanical pulps

A novel approach to determining the contribution of the fiber and fines fraction to the water retention value (WRV) of chemical and mechanical pulps

Lignocellulosic Fibers from Renewable Resources Using Green Chemistry for a Circular Economy

Absorbent Properties of Carboxymethylated Fiber, Hydroentangled Nonwoven and Regenerated Cellulose: A Comparative Study

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