Studies on swelling of wood with water and ionic liquids

Höhne, Patrick; Tauer, Klaus

doi:10.1007/s00226-015-0779-8

Cited by 9 publications

(5 citation statements)

References 30 publications

(32 reference statements)

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“…This method has, compared with others, advantages with respect to simplicity of handling, speediness of data acquisition, and versatility of changing experimental conditions (even during a running measurement). It has been successfully applied to investigate the swelling of synthetic hydrogels and wood . In addition, the method can easily quantitatively be used to follow the swelling behavior in dependence on various stimuli such as ionic strength, concentration of co‐solvent, and temperature.…”

Section: Introductionmentioning

confidence: 99%

Features of Emulsion Polymerization – How Does the Monomer Move from the Droplets into the Latex Particles?

Wei

Tauer

2016

Macromolecular Symposia

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Section: Introductionmentioning

confidence: 99%

Features of Emulsion Polymerization – How Does the Monomer Move from the Droplets into the Latex Particles?

Wei

Tauer

2016

Macromolecular Symposia

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“…For all the wood samples, the absorbed amount of ionic liquids is 30 to 85% higher than that corresponding to distilled water, demonstrating the wood matrix's high affinity for these compounds [14,15]. As an absorption trend, the uptake of ILs is strongly dependent on the molecular mass of the cation, i.e., EMIM + > BMIM + > HMIM + (Figure 1a-c).…”

Section: Resultsmentioning

confidence: 95%

“…Ionic liquids (ILs) are a class of organic compounds with low melting points and negligible vapor pressures, linked since the late 1990s with various wood-related applications. Apart from their ability to dissolve wood, many ILs have been studied for their antifungal character, wood plasticizing effect, antistatic character, or thermal and UV stabilizers (especially those with long-chain alkylammonium and alkylimidazolium cations) [12][13][14][15]. They are reported to present good penetration into the bulk of the wood, swelling it, while at the same time presenting a low leaching ability [16].…”

Section: Introductionmentioning

confidence: 99%

“…Even if many studies report (bio)polymers (including wood lignocellulose) interaction, swelling, and dissolution in ILs [12,17], there are very few studies that report the dependence of wood swelling on the structure of the ionic liquid, and virtually none that report the diffusion coefficients of commercial alkylimidazolium ionic liquids (in pure liquid form or as aqueous solutions) in the wood [14,18]. This study, showing the potential of application, could provide the required encouragement for the application of ionic liquids in the wood industry.…”

Section: Introductionmentioning

confidence: 99%

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Alkylimidazolium Ionic Liquids Absorption and Diffusion in Wood

Croitoru

Roată

2021

Applied Sciences

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Ionic liquids represent a class of highly tunable organic compounds responsible for many applications in the domain of wood-based materials. It has often been emphasized that the use of ionic liquids derives from their high affinity for lignocellulose and their good penetration ability into wood structures. This paper discusses the sorption ability of different types of 1-alkyl-3-methylimidazolium ionic liquids with lateral alkyl chains, ranging from ethyl to hexyl into spruce and beech wood, as a function of their cation molecular mass, anion type (chloride, tetrafluoroborate, acetate), and intrinsic properties (surface tension and kinematic viscosity) at room temperature. All the studied ionic liquids present high relative uptake values at the equilibrium, ranging from 11.2% to 69.7%. The bulk diffusion coefficients of the ionic liquids into the wood range from 2 × 10−3 to 28 × 10−3 mm2/min, being higher in the longitudinal direction for both types of wood. The value of the diffusion coefficients for 1-ethyl-3-methylimidazolium chloride is only 25% lower than that for water, despite the obvious differences in viscosity and surface tension, demonstrating a good penetration ability and the potential for wood industry-related applications (as impregnation compound carriers and preservatives).

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“…Thus, the matrix dominates the free swelling during the adsorption process [ 36 , 37 ]. As the cell wall adsorbed moisture, the sorbed water molecules occupied the space between the microfibrils and thereby forced them apart, resulting in a change in the dimensions of wood [ 38 , 39 , 40 , 41 ].…”

Section: Resultsmentioning

confidence: 99%

Longitudinal Mechano-Sorptive Creep Behavior of Chinese Fir in Tension during Moisture Adsorption Processes

Peng

Jiang

et al. 2017

Materials

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To provide comprehensive data on creep behaviors at relative humidity (RH) isohume conditions and find the basic characteristics of mechano-sorptive (MS) creep (MSC), the tensile creep behaviors, “viscoelastic creep (VEC)” at equilibrium moisture content and MSC during adsorption process, were performed on Chinese fir in the longitudinal direction under 20%, 40%, 60% and 80% RH (25 °C) and at 1, 1.3, and 1.6 MPa, respectively. The free swelling behavior was also measured, where the climate conditions corresponded with MSC tests. Based on the databases of free swelling, VEC, and MSC, the existence of MS effect was examined, and the application of the rheological model under the assumption of partitioned strain was investigated. The results revealed that both VEC and MSC increased with magnitude of applied stress, and the increasing RH level. Under all RH isohume conditions, the total strain of MSC was greater than that of VEC. The influence of RH level on VEC was attributed to the water plasticization effect, whereas that on MSC was presumed to be the effect of water plasticization and unstable state in the wood cell wall. In addition, the RH level promoted the relaxation behavior in MSC, while it slightly affected the relaxation behavior in VEC. In the future, the rheological model could consider the link between load configuration and the anatomic structural feature of wood.

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Studies on swelling of wood with water and ionic liquids

Cited by 9 publications

References 30 publications

Features of Emulsion Polymerization – How Does the Monomer Move from the Droplets into the Latex Particles?

Features of Emulsion Polymerization – How Does the Monomer Move from the Droplets into the Latex Particles?

Alkylimidazolium Ionic Liquids Absorption and Diffusion in Wood

Longitudinal Mechano-Sorptive Creep Behavior of Chinese Fir in Tension during Moisture Adsorption Processes

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