Water Vapor Sorption Behavior of Wildfire-Burnt Soil

Abstract The dynamic water vapor sorption of untreated, acetylated (Wac), and formaldehyde-treated (WFA) Scots pine (Pinus sylvestris L.) sapwood was studied in a dynamic vapor sorption apparatus to assess the effects of cell wall bulking and cross-linking. Both modifications resulted in a considerable reduction of reduced equilibrium moisture content (EMCR), the corresponding equilibrium times, and hysteresis in the hydroscopic range of wood. Acetylation reduced the adsorption and desorption of water at each given relative humidity (RH) step from 0% to 95% RH, whereas formalization affected the sorption behavior of wood solely above 20% RH. From 20% to 95% RH, the EMC ratio of WFA to its control steadily decreased, whereas the EMC ratio of Wac was still constant in this RH range. Below 20% RH, the sorption behavior of Wac was governed by hydroxyl blocking, whereas that of WFA was hardly influenced compared with the control. Above 20% RH, the sorption behavior of Wac was solely determined by cell wall bulking, whereas that of WFA was governed by the increased matrix stiffness due to the cross-linking of cell wall polymers.

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Water vapor sorption behavior of bamboo pertaining to its hierarchical structure

Scientific Reports ◽

10.1038/s41598-021-92103-4 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

Qi Chen ◽

Changhua Fang ◽

Ge Wang ◽

Xinxin Ma ◽

Junji Luo ◽

...

Keyword(s):

Cell Wall ◽

Water Vapor ◽

Moisture Content ◽

Moisture Transport ◽

Water Vapor Sorption ◽

Sorption Behavior ◽

Sorption Rate ◽

Vapor Sorption ◽

Dynamic Vapor Sorption ◽

Macro Scale

AbstractBamboo is an anisotropic, hierarchical, and hygroscopic material. Moisture transport in bamboo is one of the most fundamental properties affecting almost all other physical and mechanical properties of the material. This study investigated the water vapor sorption behaviors of bamboo at various structural levels: cell walls, cells (with pits) and bamboo blocks. The specimens with two sorption directions, longitudinal (L) and transverse (T), were measured by saturated salt solution method and dynamic vapor sorption. The parallel exponential kinetics model was used to analyze the sorption kinetics. The results showed that at the cell wall level, the sorption rate and equilibrium moisture content (EMC) of cell wall in the L specimens were larger than those in the T specimens. The differences were probably caused by the looser cell wall layers in the L specimens. At the cellular scale, pits in the cell wall resulted in an enhanced sorption rate and EMC of the T specimens compared with the L specimens where the pits in the parenchyma cells were only distributed in the lateral walls but not in end walls. At the macro scale, the sorption rate and moisture content of bamboo blocks were largely controlled by the vessel cells. As a hierarchically-structured plant, bamboo performs the biological function of moisture transport at all these scales. This work helps improve the understanding of water transport behavior in bamboo, which may lead to better bamboo drying and impregnation processes.

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Investigating the water vapor sorption behavior of bamboo with two sorption models

Journal of Materials Science ◽

10.1007/s10853-018-2166-y ◽

2018 ◽

Vol 53 (11) ◽

pp. 8241-8249 ◽

Cited By ~ 9

Author(s):

Xuexia Zhang ◽

Jing Li ◽

Yan Yu ◽

Hankun Wang

Keyword(s):

Water Vapor ◽

Water Vapor Sorption ◽

Sorption Behavior ◽

Vapor Sorption

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Evaluation of Isotherm Models for Water Vapor Sorption Behavior of Expansive Clays

Journal of Performance of Constructed Facilities ◽

10.1061/(asce)cf.1943-5509.0000899 ◽

2017 ◽

Vol 31 (1) ◽

Cited By ~ 4

Author(s):

Idil Deniz Akin ◽

William J. Likos

Keyword(s):

Water Vapor ◽

Water Vapor Sorption ◽

Isotherm Models ◽

Sorption Behavior ◽

Vapor Sorption ◽

Expansive Clays

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The water vapor sorption behavior of natural fibers

Journal of Applied Polymer Science ◽

10.1002/app.29725 ◽

2009 ◽

Vol 112 (3) ◽

pp. 1524-1537 ◽

Cited By ~ 209

Author(s):

Callum A. S. Hill ◽

Andrew Norton ◽

Gary Newman

Keyword(s):

Water Vapor ◽

Natural Fibers ◽

Water Vapor Sorption ◽

Sorption Behavior ◽

Vapor Sorption

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The effect of triethyl citrate on the dispersibility and water vapor sorption behavior of polylactic acid/zeolite composites

Polymer Testing ◽

10.1016/j.polymertesting.2020.106571 ◽

2020 ◽

Vol 89 ◽

pp. 106571 ◽

Cited By ~ 1

Author(s):

Miji Lee ◽

Bich Nam Jung ◽

Gi Hong Kim ◽

DongHo Kang ◽

Hyun Jin Park ◽

...

Keyword(s):

Water Vapor ◽

Polylactic Acid ◽

Water Vapor Sorption ◽

Sorption Behavior ◽

Vapor Sorption ◽

Triethyl Citrate

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Water Vapor Sorption Behavior of Arabinoxylan from Corn Pericarp

Wood Research Journal ◽

10.51850/wrj.2013.4.1.46-51 ◽

2017 ◽

Vol 4 (1) ◽

pp. 46-51

Author(s):

Tomoki Yoshida ◽

Wahyu Dwianto ◽

Yoichi Honda ◽

Hiroshi Uyama ◽

Jun-ichi Azuma

Keyword(s):

Water Vapor ◽

Water Vapor Sorption ◽

Branched Polymers ◽

Water Molecules ◽

Sorption Behavior ◽

Type Ii ◽

Vapor Sorption ◽

Sorption Model ◽

Dual Sorption

The influence of the degree of arabinose substitution in arabinoxylan on its water vapor sorption behavior was investigated by comparing the application of the independent dual sorption model and the Hailwood-Horrobin (H-H) model on corn pericarp arabinoxylans with arabinose/xylose ratios of 0.35, 0.26 and 0.12. Characterization of their sigmoid shaped adsorption isotherms grouped in IUPAC Type II indicates the usefulness of the former model to demonstrate the importance of arabinose substituents in increasing the affinity of corn pericarp arabinoxylan for water molecules. The present results open the future applicability of the independent dual sorption model for characterization of the hydration behavior of other branched polymers.

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