The water vapour sorption behaviour of acetylated birch wood: how acetylation affects the sorption isotherm and accessible hydroxyl content

Abstract The water vapour sorption behaviour of Sitka spruce was analysed based on the parallel exponential kinetics (PEK) model. The PEK model deconvolutes the sorption kinetics curve into two exponential kinetics processes (fast and slow) which have characteristic times and moisture contents associated with them. The sorption kinetics was examined at different temperatures enabling the determination of activation energies for the sorption kinetic processes throughout the hygroscopic range (from 5% to 95% relative humidities). The physical interpretation of the PEK model is also discussed.

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A hygrothermal modelling approach to water vapour sorption isotherm design for mesoporous humidity buffers

Microporous and Mesoporous Materials ◽

10.1016/j.micromeso.2015.03.001 ◽

2015 ◽

Vol 211 ◽

pp. 113-123 ◽

Cited By ~ 5

Author(s):

Fernando Sarce Thomann ◽

Matthew R. Hall ◽

Wantana Sangchoom ◽

Robert Mokaya

Keyword(s):

Water Vapour ◽

Sorption Isotherm ◽

Water Vapour Sorption ◽

Vapour Sorption ◽

Modelling Approach

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Investigating water vapour sorption kinetics of aluminium MOFs by powder X-ray diffraction

CrystEngComm ◽

10.1039/c9ce00132h ◽

2019 ◽

Vol 21 (15) ◽

pp. 2551-2558 ◽

Cited By ~ 2

Author(s):

Dominik Fröhlich ◽

Philipp Hügenell ◽

Helge Reinsch

Keyword(s):

Water Vapour ◽

Water Sorption ◽

Sorption Kinetics ◽

X Ray Diffraction ◽

Sorption Behaviour ◽

Water Vapour Sorption ◽

X Ray ◽

Vapour Sorption ◽

Kinetics Of

The water sorption behaviour of aluminium MOF CAU-10 and CAU-15-Cit was followed by in situ powder X-ray diffraction.

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Thermodynamic analysis of water vapour sorption behaviour of juvenile and mature wood of Abies alba Mill.

Journal of Materials Science ◽

10.1007/s10853-015-9283-7 ◽

2015 ◽

Vol 50 (22) ◽

pp. 7282-7292 ◽

Cited By ~ 12

Author(s):

Cristina Simón ◽

Luis García Esteban ◽

Paloma de Palacios ◽

Francisco García Fernández ◽

Raquel Martín-Sampedro ◽

...

Keyword(s):

Water Vapour ◽

Thermodynamic Analysis ◽

Abies Alba ◽

Mature Wood ◽

Sorption Behaviour ◽

Water Vapour Sorption ◽

Vapour Sorption

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Variability in water vapour sorption isotherm in Japanese Larch (Larix kaempferiLamb.) – earlywood and latewood influences

International Wood Products Journal ◽

10.1179/2042645314y.0000000090 ◽

2014 ◽

Vol 6 (2) ◽

pp. 53-59 ◽

Cited By ~ 11

Author(s):

C. A. S. Hill ◽

J. Ramsay ◽

B. Gardiner

Keyword(s):

Water Vapour ◽

Sorption Isotherm ◽

Japanese Larch ◽

Water Vapour Sorption ◽

Vapour Sorption

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The water vapour sorption behaviour of three celluloses: analysis using parallel exponential kinetics and interpretation using the Kelvin-Voigt viscoelastic model

Cellulose ◽

10.1007/s10570-011-9512-4 ◽

2011 ◽

Vol 18 (3) ◽

pp. 517-530 ◽

Cited By ~ 44

Author(s):

Yanjun Xie ◽

Callum A. S. Hill ◽

Zaihan Jalaludin ◽

Dongyang Sun

Keyword(s):

Water Vapour ◽

Viscoelastic Model ◽

Sorption Behaviour ◽

Water Vapour Sorption ◽

Vapour Sorption

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Water vapour sorption properties of thermally modified and pressurised hot-water-extracted wood powder

Holzforschung ◽

10.1515/hf-2018-0301 ◽

2019 ◽

Vol 73 (12) ◽

pp. 1059-1068 ◽

Cited By ~ 6

Author(s):

Kristiina Lillqvist ◽

Susanna Källbom ◽

Michael Altgen ◽

Tiina Belt ◽

Lauri Rautkari

Keyword(s):

Water Vapour ◽

Thermal Modification ◽

Hot Water ◽

Water Extraction ◽

Hydroxyl Group ◽

Wood Powder ◽

Sorption Behaviour ◽

Hot Water Extraction ◽

Water Vapour Sorption ◽

Vapour Sorption

Abstract The objective of the study was to investigate the water vapour sorption behaviour of thermally modified (TM) wood powder, e.g. ground wood prepared from waste streams of TM solid wood, and wood powder that was extracted in pressurised hot water. Solid spruce wood was TM in steam conditions (210°C for 3 h), milled and hot-water-extracted (HWE) at elevated pressure (140°C for 1 h). The results evidence that the hot-water extraction reduced the water sorption and the accessible hydroxyl group concentration by the removal of amorphous carbohydrates. In contrast, the enhanced cross-linking of the cell wall matrix and the annealing of amorphous matrix polymers during thermal modification reduced the sorption behaviour of wood additionally, without further reducing the hydroxyl accessibility. These additional effects of thermal modification were at least partially cancelled by hot-water extraction. The results bring novel insights into the mechanisms that reduce the water vapour sorption of wood by compositional and structural changes induced by heating.

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