Evidence for a Hydrate of Cellulose from Studies of its Surface Properties

Joubert, Jean‐Marc; Krige, G. J. R.; Borgin, K.

doi:10.1038/1841561b0

Cited by 11 publications

(9 citation statements)

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“…The fact that acid hydrolysis can take place at typical humidities and temperatures found in libraries provides evidence that bulk liquid water is not required. Rather, the amount of adsorbed or hydrated water associated with the cellulosic material (Joubert et al 1959) appears to be sufficient. On the other hand, many studies have reported increasing rates of hydrolytic decomposition with increasing relative humidity (Zou et al 1996a;Baty et al 2010;Zervos 2010).…”

Section: Moisture Contentmentioning

confidence: 97%

“…8, much of that water has been attributed to other mechanisms, such as hydration of the cellulosic material (Joubert et al 1959), "bound water" (Park et al 2006), or water participating in a type of hydrogel (Scally et al 2006;Hubbe et al 2013). Past research suggests that ionic species including H3O + and OH -can readily diffuse within a hydrogel, though rates of diffusion may be slower in comparison to diffusion in bulk water (Bromberg 1991;Feng et al 2011;Golmohamadi and Wilkinson 2013).…”

Section: Absorption Of Water By Paper As a Function Of Relative Humiditymentioning

confidence: 99%

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Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Hubbe¹,

Smith²,

Zou³

et al. 2017

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Section: Moisture Contentmentioning

confidence: 97%

Section: Absorption Of Water By Paper As a Function Of Relative Humiditymentioning

confidence: 99%

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Hubbe¹,

Smith²,

Zou³

et al. 2017

BioResources

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“…Some researchers have suggested that the association of such water within the fibers of paper is like a hydrate, something analogous to hydrated forms of minerals (Campbell 1934;Joubert et al 1959;Clark 1984). The term "hydrate" is also supported by the generation of heat when water is added to dry fibers (Maloney et al 1998b).…”

Section: Humidity and Moisturementioning

confidence: 99%

Prospects for Maintaining Strength of Paper and Paperboard Products While Using Less Forest Resources: A Review

Hubbe¹

2013

BioResources

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Paper production requires large amounts of cellulosic fiber, whereas the world's forested lands and croplands have a finite capacity to supply such resources. To deal with likely future pressure on forest resources, as well as to hold down costs of materials, publications examined in the preparation of this review suggest that the paper industry will need to implement several concurrent strategies. In particular, the industry can be expected to view recycling as a central part of its activities. Basis weights of various paper-based products can be expected to decrease over the coming decades, and more of the fiber content will be replaced with fillers such as calcium carbonate. Such trends will place intense demands upon chemical-based strategies to enhance the bonding within paper and paperboard. Based on the literature, further progress in reducing the amount of new forest resources used to meet a given set of paper product requirements will require a combined approach, taking into account various fiber attributes, nanostructures, novel concepts in bond formation, and advances in the unit operations of papermaking.

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“…This is driven to some extent, but not solely, by a concentration gradient and may explain some of the incomplete retention observed at larger scale. [193], c [194], d [195], e [196], f [197], g [198], h [199], i [200], j [201], k [202], l [203], m [204].…”

Section: Micropollutant Sorption By Different Polymer Materialsmentioning

confidence: 99%

Micropollutant sorption to membrane polymers: A review of mechanisms for estrogens

Schäfer

Akanyeti

Semiao

2011

Advances in Colloid and Interface Science

246

140

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Organic micropollutants such as estrogens occur in water in increasing quantities from predominantly anthropogenic sources. In water such micropollutants partition not only to surfaces such as membrane polymers but also to any other natural or treatment related surfaces. Such interactions are often observed as sorption in treatment processes and this phenomenon is exploited in activated carbon filtration, for example. Sorption is important for polymeric materials and this is used for the concentration of such micropollutants for analytical purposes in solid phase extraction. In membrane filtration the mechanism of micropollutant sorption is a relatively new discovery that was facilitated through new analytical techniques. This sorption plays an important role in micropollutant retention by membranes although mechanisms of interaction are to date not understood. This review is focused on sorption of estrogens on polymeric surfaces, specifically membrane polymers. Such sorption has been observed to a large extent with values of up to 1.2 ng/cm(2) measured. Sorption is dependent on the type of polymer, micropollutant characteristics, solution chemistry, membrane operating conditions as well as membrane morphology. Likely contributors to sorption are the surface roughness as well as the microporosity of such polymers. While retention-and/or reflection coefficient as well as solute to effective pore size ratio-controls the access of such micropollutants to the inner surface, pore size, porosity and thickness as well as morphology or shape of inner voids determines the available area for sorption. The interaction mechanisms are governed, most likely, by hydrophobic as well as solvation effects and interplay of molecular and supramolecular interactions such as hydrogen bonding, π-cation/anion interactions, π-π stacking, ion-dipole and dipole-dipole interactions, the extent of which is naturally dependent on micropollutant and polymer characteristics. Systematic investigations are required to identify and quantify both relative contributions and strength of such interactions and develop suitable surface characterisation tools. This is a difficult endeavour given the complexity of systems, the possibility of several interactions taking place simultaneously and the generally weaker forces involved.

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Evidence for a Hydrate of Cellulose from Studies of its Surface Properties

Cited by 11 publications

References 0 publications

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Deacidification of Acidic Books and Paper by Means of Non-aqueous Dispersions of Alkaline Particles: A Review Focusing on Completeness of the Reaction

Prospects for Maintaining Strength of Paper and Paperboard Products While Using Less Forest Resources: A Review

Micropollutant sorption to membrane polymers: A review of mechanisms for estrogens

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