Structural and thermodynamic characterization of modified cellulose fiber-based materials and related interactions with water vapor

Bedane, Alemayehu H.; Xiao, Huining; Eić, Mladen; Farmahini-Farahani, Madjid

doi:10.1016/j.apsusc.2015.06.022

Cited by 21 publications

(20 citation statements)

References 44 publications

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“…The total water content is 5.6% at 40% relative humidity and increases to 9.3% at 80%, as shown in Figure b. These values are in excellent agreement with the results published by Bedane et al who also used uncoated paper . The relationship between water content and relative humidity is consistent with that of the losses: at higher relative humidities both the weight of the paper sample and the losses show a greater increase.…”

Section: Resultssupporting

confidence: 90%

“…The thickness of the ink on glass is thicker than that of ink on paper and so has a lower sheet resistance. b) Total water content of paper as a function of relative humidity for this work in comparison to work by Bedane et al For both plots, the vertical error bars are included for peak to peak values but are not visible on this scale.…”

Section: Resultsmentioning

confidence: 99%

“…Water absorbed in paper can take three forms depending on the type of water‐paper absorption mechanism: non‐freezing water (tightly bound water), freeze bound water (slightly bound water) and freezing unbound water (free water). Non‐freezing water is hydrogen bonded to two anhydroglucose units of the cellulose and so has lower mobility than free water (i.e.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

The Effect of Humidity on Microwave Characteristics of Screen Printed Paper‐Based Electronics

Shenton

Cooke

Rácz

et al. 2018

Physica Status Solidi (a)

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This paper addresses one of the key issues in using paper electronics at microwave frequencies. As paper is hygroscopic, the varying moisture content can lead to differing dielectric and even conductive properties of paper electronics and must be taken into consideration in any device design. In this work, coplanar waveguides (CPWs) have been screen printed using silver ink on matt paper. Increasing the relative humidity between 40 and 90% is shown to increase the losses, decrease the propagation velocity and decrease the characteristic impedance of CPWs. The effect of water on both silver flake ink and the matt paper used in this work are considered, and it is shown that the change in permittivity of the substrate as a result of absorbed water within paper is the most dominant factor on the microwave characteristics. The reported findings should be considered in paper‐based applications at microwave frequencies, as the changes in transmission‐line parameters can lead to drastic variations in device and system operation.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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The Effect of Humidity on Microwave Characteristics of Screen Printed Paper‐Based Electronics

Shenton

Cooke

Rácz

et al. 2018

Physica Status Solidi (a)

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“…Non-toxic regenerated cellulose films formed by all mentioned solvent system possess excellent mechanical properties, transparency, and barrier resistance to oxygen, carbon dioxide and water vapor due to more extensive hydrogen bonding among cellulose chains, compared to native cellulose I films (Bedane et al 2015b;Myllytie et al 2010;Yang et al 2011). Regenerated cellulose based films have substantially higher oxygen barrier than biodegradable synthetic polymers such as, poly(vinylidene chloride) and poly(vinyl alcohol), even at low relative humidity (Yang et al 2011).…”

Section: Introductionmentioning

confidence: 97%

Cellulose/nanoclay composite films with high water vapor resistance and mechanical strength

et al. 2015

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Cellulose based films were fabricated by dissolving the micro-crystalline cellulose and cotton linter in a LiOH/urea aqueous system, followed by regeneration in acetone. The water vapor transmission rate (WVTR) values of the films were measured and the results indicated that regenerated micro-crystalline cellulose (RMCC) showed lower WTVR than regenerated cotton linter (RCL). WVTR values were proportional to the thickness of samples. The films also exhibited high oil resistance as no fat oil could pass through the RMCC and RCL films even after a week. The RMCC and RCL/natural-montmorillonite nanocomposites (Na-MMT) films were prepared and characterized. The effect of Na-MMT loading on the mechanical, crystallinity and water vapor transmission properties of the nanocomposites was further investigated. Na-MMT loading improved the mechanical properties and decreased the crystallinity of the nanocomposite films. The results indicated partially intercalated nano-layered structures with WVTR as low as 43 g/m 2 /day.

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“…At high RH values, the monolayer-multilayer adsorption path can be accompanied by a more rapid increase in sorbed water due to the processes of capillary condensation in the porous structure. The Guggenheim-Andersen-de Boer (GAB) three-parameter sorption equation has been used to interpret the physisorption of water on paper as it is capable of describing the full shape of type II isotherm and yields meaningful physical parameters as monolayer capacity and energy constant related to the net molar heat of adsorption (Timmermann 2003;Parker et al 2006;Bedane et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Moisture sorption and diffusion in historical cellulose-based materials

et al. 2018

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Moisture adsorption and diffusion were examined in 17 samples of historical and modern papers and cardboards, differing in the time of production and the pulping process. The moisture adsorption data for paper materials made of rags, gelatin-sized were close to each other whereas woodpulp papers showed higher intra-group variability due to varying contents of lignin and rosin sizing. The average adsorption curve for all specimens was close to that of pure cellulose. In-plane diffusivities along the paper sheets in a stack, primary direction of uptake and release moisture by library objects, were determined as a function of relative humidity and paper compression. Typically, the in-plane diffusivities fell within the range of 6 9 10 -6 -1.7 9 10 -5 m 2 /s and were significantly affected by the paper fraction in the specimens which were combination of paper sheets and thin air layers or pockets between the sheets. The external mass transfer coefficient at the surface of the paper objects perpendicular to the paper sheets exceeded 2 9 10 -3 m/s and significantly depended on the intensity of air motion in typical environments. Effective use of the adsorption and diffusion information obtained was demonstrated in modelling buffering capacities of books.

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Structural and thermodynamic characterization of modified cellulose fiber-based materials and related interactions with water vapor

Cited by 21 publications

References 44 publications

The Effect of Humidity on Microwave Characteristics of Screen Printed Paper‐Based Electronics

The Effect of Humidity on Microwave Characteristics of Screen Printed Paper‐Based Electronics

Cellulose/nanoclay composite films with high water vapor resistance and mechanical strength

Moisture sorption and diffusion in historical cellulose-based materials

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