The influence of classical and enzymatic treatment on the surface charge of cellulose fibres

Ribitsch, Volker; Stana‐Kleinschek, Karin; Jeler, Slava

doi:10.1007/bf00654060

Cited by 41 publications

(28 citation statements)

References 6 publications

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“…The amount of the different fibre components quantified (Table 2) does not add up to 100%, simply because only the major components are reported. We did not determine the amount of pectin, pentosan and proteins as well as the extractable organic matter, such as waxes, fatty alcohols, fatty acids and different esters (Ribitsch et al 1996). Sisal has a cellulose content of approx.…”

Section: Chemical Composition Of the Fibresmentioning

confidence: 99%

Wetting behaviour, moisture up-take and electrokinetic properties of lignocellulosic fibres

Baltazar‐y‐Jimenez

Bismarck

2006

Cellulose

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The wetting and moisture up-take behaviour, as well as the electrokinetic properties of various lignocellulosic fibres were characterised. Knowledge of surface and water uptake properties of this kind of materials will help to tailor their potential use in different end user applications. The surface tension of the fibres was determined from wetting measurements using the capillary rise technique. The wetting data were used to determine the surface tension of the fibres. Our results show that the surface tension of the lignocellulosic fibres is a linear function of their cellulose content. Zeta-potential measurements were exploited to characterise the surface chemistry of the fibres. Measuring the zeta-potential as function of time enables the rapid assessment of the water up-take, i.e. the swelling behaviour of the fibres. The results obtained by the zeta potential measurements correlate, with the exception of flax, in a linear manner with the results obtained from conventional moisture uptake measurements. Even though all lignocellulosic fibres are very hydrophilic due to the presence of polar oxygen containing groups they have different grades of hydrophilicity, which is also reflected in the different water uptake capabilities measured.The wetting, moisture uptake and electrokinetic properties of the lignocellulosic fibres are determined by the availability of the surface functional groups present, which is usually consequence of the processes used to separate, and extract the fibres from the plant (retting), as well as any further processing used to improve the fibre quality.

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Section: Chemical Composition Of the Fibresmentioning

confidence: 99%

Wetting behaviour, moisture up-take and electrokinetic properties of lignocellulosic fibres

Baltazar‐y‐Jimenez

Bismarck

2006

Cellulose

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“…These are, for example, the interaction energies, electrokinetic and swelling properties, and the hydrophilic and hydrophobic character of the fibres. [5,6] The fibre properties under technological conditions in aqueous systems are of the greatest interest, especially their interaction with the following process compounds: -dyes, fluorescent whitener -surfactants -differentions -finishing chemicals…”

Section: Introductionmentioning

confidence: 99%

“…Determination of the interaction with dyes and surfactants, the diffusion of dyes into the fibre, the dye-ability and colourimetric investigations. [6,10] This article intends to present and discuss the influence of the primary structure (crystalline/amorphous), surface modifications and the swelling on the fibre electrokinetic properties and the good correlation with the results using classical investigation methods. Further on it will show that electrokinetic investigations are very useful tools for describing surface modifications during the process and the interaction ability with process chemicals.…”

Section: Introductionmentioning

confidence: 99%

The Significance of Surface Charge and Structure on the Accessibility of Cellulose Fibres

Ribitsch¹,

Stana‐Kleinschek

Kreže

et al. 2001

Macromol. Mater. Eng.

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The electrokinetic properties of macroscopic solids can describe both the surface modifications as well as the interaction abilities during processing. Normally the zeta potential (ζ) is measured and can be used to develop, optimise and control the manufacturing process. The zeta potential of natural and regenerated cellulose fibres changes noticeably during the pre‐treatment and finishing process and it is important for the quality of the final product (whiteness, colour, hydrophilicity). The pre‐treatment of cellulose fibres improves the accessibility of dissociable groups. Further improvement of hydrophilicity (mercerisation) causes a pronounced increase in the surface charge density and a reduction in the degree of crystallinity and structural modifications. The progress of the chemical as well as the enzymatic treatment correlates with ζ. These data correlate very well with the results obtained using tensiometry, water retention, and water vapour and iodine adsorption. The changes in crystallinity index and the accessibility for low molecular components are well described by the latter methods.

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“…Heat release rate was reduced by all coated samples, but a 10 BL coating of PEI-Ludox SM reduced peak heat release by 20% and heat release rate by 17%. Pre-soaking the cotton in an aqueous NaOH solution before LbL deposition further improves this behavior due to increased negative charge on the surface of the cellulosic fibers [45]. This work demonstrates a simple method for uniformly depositing thin films on the complex surface of cotton fibers and the efficacy of colloidal silica as an alternative to inorganic clay platelets for flame retardant fabric.…”

Section: Introductionmentioning

confidence: 93%

Growth and fire resistance of colloidal silica-polyelectrolyte thin film assemblies

Laufer

Carosio

Martinez

et al. 2011

Journal of Colloid and Interface Science

113

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The influence of classical and enzymatic treatment on the surface charge of cellulose fibres

Cited by 41 publications

References 6 publications

Wetting behaviour, moisture up-take and electrokinetic properties of lignocellulosic fibres

Wetting behaviour, moisture up-take and electrokinetic properties of lignocellulosic fibres

The Significance of Surface Charge and Structure on the Accessibility of Cellulose Fibres

Growth and fire resistance of colloidal silica-polyelectrolyte thin film assemblies

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