Electrokinetic properties of natural fibres

Bellmann, Cornelia; Caspari, Anja; Albrecht, Victoria; Doan, Thi-Thu-Loan; Mäder, Edith; Luxbacher, Thomas; Kohl, R. A.

doi:10.1016/j.colsurfa.2005.06.033

Cited by 91 publications

(54 citation statements)

References 7 publications

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“…These strong polar groups bond water, induce swelling and are generally responsible for the hydrophilic behaviour of the fibre surface. As it has been previously reported (Bellmann et al 2005), increasing pH produces more negative value of cotton zeta potential, the fact which confirms increased cotton fibre polarity and explains the behaviour of untreated cotton (increased WRC) in alkaline environment.…”

Section: Drying Curves and Moisture Regainsupporting

confidence: 62%

Functionalization of cotton with poly-NiPAAm/chitosan microgel: Part II. Stimuli-responsive liquid management properties

et al. 2011

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An innovative strategy for functional finishing of cotton involves application of stimuliresponsive surface modifying system based on temperature-and pH-responsive poly-NiPAAm/chitosan microgel. The stimuli-responsiveness implied to cotton is the consequence of swelling/collapse of the microgel particles incorporated to the fibre surface, which produces an active liquid management system. The performance of functionalized cotton fabric in terms of liquid management properties was assessed by choosing appropriate techniques (water uptake; thin-layer wicking; water retention capacity; and drying capability) and discussion of the results was based on the types of water that are expected to be present in hydrated cotton and stimuli-responsive microgel.

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Section: Drying Curves and Moisture Regainsupporting

confidence: 62%

Functionalization of cotton with poly-NiPAAm/chitosan microgel: Part II. Stimuli-responsive liquid management properties

et al. 2011

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“…The surface modification procedures applied to natural fibres include hydrophobisation of the fibre surface using coupling agents such as silanes [35,36], which should lead to improved adhesion to non-polar polymer matricies [37]. Other treatments include alkalisation, acetylation and cyanoethylation, which cannot only improve the fibre's adhesion to the matrix, but also aid polymer diffusion into the fibre bulk, providing the adhesion with a physical dimension [38,39].…”

Section: Introductionmentioning

confidence: 99%

Methods to determine surface energies of natural fibres: a review

Heng

Pearse

Thielmann

et al. 2007

Composite Interfaces

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“…14). We verified the accuracy of our derivation of G and numerical solutions by comparing the values we calculate for z against the data of z versus I c for sugar beet (Beta vulgaris) pectin (Nakauma et al, 2008; G ¼ G high ) and for cellulose (Bellmann et al, 2005; G ¼ G low ). We find good agreement between our predictions and the experimental data.…”

Section: Determination Of G From Experimental Measurementsmentioning

confidence: 99%

Impact of Electroviscosity on the Hydraulic Conductance of the Bordered Pit Membrane: A Theoretical Investigation

Santiago¹,

Pagay²,

Stroock³

2013

PLANT PHYSIOLOGY

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In perfusion experiments, the hydraulic conductance of stem segments (K xylem ) responds to changes in the properties of the perfusate, such as the ionic strength (I c ), pH, and cationic identity. We review the experimental and theoretical work on this phenomenon. We then proceed to explore the hypothesis that electrokinetic effects in the bordered pit membrane (BPM) contribute to this response. In particular, we develop a model based on electroviscosity in which hydraulic conductance of an electrically charged porous membrane varies with the properties of the electrolyte. We use standard electrokinetic theory, coupled with measurements of electrokinetic properties of plant materials from the literature, to determine how the conductance of BPMs, and therefore K xylem , may change due to electroviscosity. We predict a nonmonotonic variation of K xylem with I c with a maximum reduction of 18%. We explore how this reduction depends on the characteristics of the sap and features of the BPM, such as pore size, density of chargeable sites, and their dissociation constant. Our predictions are consistent with changes in K xylem observed for physiological values of sap I c and pH. We conclude that electroviscosity is likely responsible, at least partially, for the electrolyte dependence of conductance through pits and that electroviscosity may be strong enough to play an important role in other transport processes in xylem. We conclude by proposing experiments to differentiate the impact of electroviscosity on K xylem from that of other proposed mechanisms.

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Electrokinetic properties of natural fibres

Cited by 91 publications

References 7 publications

Functionalization of cotton with poly-NiPAAm/chitosan microgel: Part II. Stimuli-responsive liquid management properties

Functionalization of cotton with poly-NiPAAm/chitosan microgel: Part II. Stimuli-responsive liquid management properties

Methods to determine surface energies of natural fibres: a review

Impact of Electroviscosity on the Hydraulic Conductance of the Bordered Pit Membrane: A Theoretical Investigation

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