Wettability of kraft pulps-effect of surface composition and oxygen plasma treatment

Ström, Gōran; Carlsson, Gilbert

doi:10.1163/156856192x01088

Cited by 72 publications

(41 citation statements)

References 6 publications

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“…Surface coverage by lignin (S lig ) and extractives (S ext ) were determined using the O/C ratio of the untreated and acetone-extracted (Soxhlet, over-night) samples using the equations by Ström and Carlsson (1992), where the O/C ratio of the sample is compared to the theoretical O/C ratios of pure cellulose (0.83) and of a model extractive (0.11).…”

Section: Methodsmentioning

confidence: 99%

Advanced Studies on the Topochemistry of Softwood Fibres in Low-Consistency Refining as Analyzed by FE-SEM, XPS, and ToF-SIMS

Mou

Iamazaki²,

Zhan

et al. 2013

BioResources

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The influence of low-consistency refining on the surface chemical and morphological properties of softwood chemical pulp was investigated using a special laboratory refining station and advanced topochemical analyses. Refined pulp was fractionated in order to investigate the refining effect on fibres separately, without fines. The morphological properties of whole pulp and fibre fraction were studied by field-emission-SEM. X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectrometry (ToF-SIMS) were used to analyze the surface chemistry of the pulp fibres before and after refining. As a result of refining, fibre shape changed from tubular to flat. The surface coverage by extractives increased during refining together with increasing refining energy both in the whole pulp and in the fibre fraction; the increase was more significant in the whole pulp. This is probably due to leakage of hydrophobic components from the pulp fines. In the fibre fraction, surface coverage by lignin increased in the course of refining, but in the whole pulp the trend was the opposite. Similar trends were detected by observing the ToF-SIMS peaks of polysaccharides, lignin, and extractives. Refining modifies the surface chemistry and morphology of fibres, presumably by making structural changes in the fibre cell wall composition. Eventually, these changes induce increased fibre-to-fibre bonding capability and decreased scattering of light.

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Section: Methodsmentioning

confidence: 99%

Advanced Studies on the Topochemistry of Softwood Fibres in Low-Consistency Refining as Analyzed by FE-SEM, XPS, and ToF-SIMS

Mou

Iamazaki²,

Zhan

et al. 2013

BioResources

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“…the salts of fatty and resin acids. Ström and Carlsson (1992) found that an adverse effect of extractives on the water-wettability of kraft pulps could be overcome by treatment with oxygen plasma. The effect was attributed to oxidation of the exposed lignin.…”

Section: Extractives and Absorbencymentioning

confidence: 99%

“…"Review of cellulosic absorbents," BioResources 8(4), 6556-6629. 6593 wicking rates (Beuther et al 2010), and the time for a water drop to be absorbed (Ström and Carlsson 1992).…”

Section: Tests To Measure Absorption Ratesmentioning

confidence: 99%

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Hubbe¹,

Ayoub²,

Daystar³

et al. 2013

BioResources

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Cellulose and some cellulose derivatives can play vital roles in the enhancement of the performance of absorbent products. Cellulose itself, in the form of cellulosic fibers or nano-fibers, can provide structure, bulk, water-holding capacity, and channeling of fluids over a wide dimensional range. Likewise, cellulose derivatives such as carboxymethylcellulose (CMC) have been widely studied as components in superabsorbent polymer (SAP) formulations. The present review focuses on strategies and mechanisms in which inclusion of cellulose -in its various formscan enhance either the capacity or the rate of aqueous fluid absorption in various potential applications.

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“…For kraft pulp fibres, a different way of interpreting the N O /N C values (Laine et al 1994), first suggested by Ström and Carlsson (1992) has been widely accepted. For an extracted pulp, the surface coverage of lignin was taken as:…”

Section: Introductionmentioning

confidence: 99%

Composition of lignocellulosic surfaces: comments on the interpretation of XPS spectra

et al. 2009

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The surface compositions of lignocellulosic materials are critical to their end use performance. X-ray photoelectron spectroscopy (XPS) measures the elemental composition sampling of a very thin surface layer, and has long been used to assess the surface composition of dry lignocellulosic materials. The method is based on the quantification of carbon and oxygen XPS peak sizes and shapes, but care is necessary to minimize the effects of surface contamination and degradation. We review the XPS method, and present a simplified approach to estimate the surface lignin content of extractive-free samples. The approach corrects for surface contamination and degradation by measuring the XPS signal of a cellulose standard under the same conditions as the lignin-containing samples. The method is illustrated using XPS results for a series of extracted softwood kraft pulps.

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Wettability of kraft pulps-effect of surface composition and oxygen plasma treatment

Cited by 72 publications

References 6 publications

Advanced Studies on the Topochemistry of Softwood Fibres in Low-Consistency Refining as Analyzed by FE-SEM, XPS, and ToF-SIMS

Advanced Studies on the Topochemistry of Softwood Fibres in Low-Consistency Refining as Analyzed by FE-SEM, XPS, and ToF-SIMS

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Composition of lignocellulosic surfaces: comments on the interpretation of XPS spectra

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