On the solvent‐induced swelling of low‐rank coals

Jones, J.C.; Boother, M.; Brown, Marjorie J.

doi:10.1002/jctb.280520212

Cited by 9 publications

(3 citation statements)

References 7 publications

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“…When different solvents were tested, swelling was only observed for solvents with values of the solubility parameter corresponding to the nature of the polymer. Lower or no swelling was observed for lower or higher values of the solvent solubility parameter for materials as different as coal (Jones et al 1991), paints (Phenix 2002), polyelectrolytes (Ono et al 2007), and partially-dried larch wood (Loskutov and Aniskina 2008).…”

Section: Tangential and Volume Strain In Organic Solutionsmentioning

confidence: 98%

Solvent Polarity and Internal Stresses Control the Swelling Behaviour of Green Wood During Dehydration in Organic Solution

Chang¹,

Quignard²,

Renzo³

et al. 2012

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The dimensional variations of green wood samples induced by organic solvents have been studied. The solvents used (ethanol, isopropanol, acetone, and acetonitrile) covered a wide range of polarity and were studied pure and in aqueous solutions over a wide range of concentrations. Samples of normal and tension wood of poplar were used in order to minimize the effect of hydrophobic extractives on the wood-solvent interactions. The evolution of wood volume and of tangential strain with the concentration of the organic solvents shows a behavior similar to gels, with a significant swelling for solutions of intermediate polarity. The similarity of volume obtained in water and less polar pure organic solvents strikingly contrasted the different effects of water and organic solvents on dry wood. Low-polarity solvents were extremely effective in the stress release of tension wood, as indicated by the pattern of longitudinal shrinkage. Solvent exchange does not affect the mesoporous structure of the cell walls of tension wood and is a promising way to reduce internal stress in wood products.

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Section: Tangential and Volume Strain In Organic Solutionsmentioning

confidence: 98%

Solvent Polarity and Internal Stresses Control the Swelling Behaviour of Green Wood During Dehydration in Organic Solution

Chang¹,

Quignard²,

Renzo³

et al. 2012

BioResources

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show abstract

“…The Viton having been so exposed to this solvent mixture swells to about twice its initial volume [5]. The weight of the swollen sample was 500 mg.…”

Section: Detailed Discussionmentioning

confidence: 99%

“…A sample of Viton Õ previously soaked for about 48 h in a solvent mixture of 60 : 40 (volume basis) MEK and methanol gave, in the microcalorimeter set at 60 C, a steady signal of %50 mW. The Viton having been so exposed to this solvent mixture swells to about twice its initial volume [5]. The weight of the swollen sample was 500 mg.…”

Section: Detailed Discussionmentioning

confidence: 99%