The effect of surfactants on wicking flow in fiber networks

Hodgson, Kevin T.; Berg, John C.

doi:10.1016/0021-9797(88)90404-3

Cited by 83 publications

(62 citation statements)

References 11 publications

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“…At the very least, the expected length and time scales will change, sometimes drastically [56,127]. The effect of the surfactant (or time-dependent composition) (e.g.…”

Section: Fig 13mentioning

confidence: 99%

Imbibition in disordered media

Alava

Dubé

Rost

2004

Advances in Physics

285

333

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The physics of liquids in porous media gives rise to many interesting phenomena, including imbibition where a viscous fluid displaces a less viscous one. Here we discuss the theoretical and experimental progress made in recent years in this field. The emphasis is on an interfacial description, akin to the focus of a statistical physics approach. Coarse-grained equations of motion have been recently presented in the literature. These contain terms that take into account the pertinent features of imbibition: non-locality and the quenched noise that arises from the random environment, fluctuations of the fluid flow and capillary forces. The theoretical progress has highlighted the presence of intrinsic length-scales that invalidate scale invariance often assumed to be present in kinetic roughening processes such as that of a two-phase boundary in liquid penetration. Another important fact is that the macroscopic fluid flow, the kinetic roughening properties, and the effective noise in the problem are all coupled. Many possible deviations from simple scaling behaviour exist, and we outline the experimental evidence. Finally, prospects for further work, both theoretical and experimental, are discussed.

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“…At the very least, the expected length and time scales will change, sometimes drastically [56,127]. The effect of the surfactant (or time-dependent composition) (e.g.…”

Section: Fig 13mentioning

confidence: 99%

Imbibition in disordered media

Alava

Dubé

Rost

2004

Advances in Physics

285

333

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“…First, in the case of ordinary paper, addition of various surfactants has been shown to facilitate more rapid wetting in some cases (Hodgson and Berg 1988;Shepherd and Xiao 1999). Such treatments were able to overcome a "wetting delay" phenomenon that is often observed when water is spread onto initially-dry paper.…”

Section: Surfactants and Absorbencymentioning

confidence: 99%

“…Smaller pores, though they would hold onto the fluids even more strongly, would be expected to offer greater resistance to flow, thus probably reducing the initial rate of absorption. Hodgson and Berg (1988) showed that in some practical cases the rate of wetting of paper products by aqueous liquids could be increased by use of surfactants. It was proposed that the surfactants acted as wetting agents, decreasing the contact angle of water.…”

Section: Capillarity and The Lucas-washburn Equationmentioning

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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“…A 1972 review by Collett [33] gives an overview of the importance of wetting in the adhesion of wood. Young [21], Klungness [38], and Hodgson and Berg [34] used the Wilhelmy technique to measure surface characteristics of various types of pulp fibers, while…”

Section: Introductionmentioning

confidence: 99%

Surface Energy Compatibilites of Cellulose and Polypropylene

1992

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In addition to its use in recycled paper products, recovered lignocellulosic fiber can be used as a reinforcement filler in composites with polyolefins. However, problems in both processing and product performance are often caused by the incompatibilities of surface energies between hydrophilic cellulose and non-polar polyolefin. This poor match in surface polarities is detrimental to strong adhesive bonding between olefin and cellulose. This work examines the effect of surface energy on the adhesion properties of polypropylene and cellulose. In particular, three materials accepted as paper-sizing agents were used to change the cellulosic fiber's surface energy to make it more compatible with the surface energy of polypropylene.Cellulose fibers were treated by various methods with (1) alkyl ketene dimer, (2) alkenyl succinic anhydride, and (3) stearic acid and were characterized by their surface energies as determined by single fiber wettability measurements using the Wilhelmy technique. These measurements are discussed in detail. Results from these measurments can be related to differences in adhesion between treated cellulose and polypropylene, which can be measured by internal bond tests on hot-pressed composite sheets.Results indicate that the use of sizing agents reduces the acid/base (hydrogen bonding) character of the cellulose surface. Interactions involving hydrogen bonding are important in cellulose/modified-polypropylene composites. Reduction of these interactions appears to lead to a corresponding reduction in adhesion between cellulose and polypropylene.

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The effect of surfactants on wicking flow in fiber networks

Cited by 83 publications

References 11 publications

Imbibition in disordered media

Imbibition in disordered media

Enhanced Absorbent Products Incorporating Cellulose and Its Derivatives: A Review

Surface Energy Compatibilites of Cellulose and Polypropylene

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