Multipurpose Nonwoven Viscose/Polypropylene Fabrics: Effect of Fabric Characteristics and Humidity Conditions on the Volume Electrical Resistivity and Dielectric Loss Tangent

Asanovic, Koviljka A.; Cerović, Dragana D.; Kostić, Mirjana; Mihailović, Tatjana; Ivanovska, Aleksandra

doi:10.1007/s12221-020-1340-4

Cited by 6 publications

(9 citation statements)

References 28 publications

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“…The jute fabric structural characteristics were characterized by the fabric thickness (measured on an AMES 414-10 thickness tester under a pressure of 10 kPa), fabric weight (determined using ISO 3801 (1977) standard), and fabric porosity (Ivanovska et al 2020).…”

Section: Characterization Of Jute Fabricsmentioning

confidence: 99%

“…The effect of five variables, four internal (jute fabrics' chemical composition and structural characteristics, fibers' fine structure and moisture sorption) and one external (frequency of electric field) on the fabrics' electro-physical properties in a condition of high humidity was studied. The dielectric loss tangent (i.e., material dissipation factor) corresponds to the energy losses occurring due to the motion or rotation of atoms or molecules within the fabric positioned in a periodic electric field (Asanovic et al 2020). The fabric effective relative dielectric permeability (i.e., a real part of the permittivity) is a measure of how much energy from an external electric field is stored in it and describes its ability to polarize (Fares et al 2019;Loss et al 2020).…”

Section: Jute Fabrics' Electro-physical Properties In a Condition Of mentioning

confidence: 99%

“…The β wet relaxations noticed in the frequency range between 30 Hz and 300 Hz (for A5, A30, C15, and C60) can be associated with the orientation motion of the polar groups present in fibers (primarily hydroxyl and carboxyl groups), water, and structures formed by introducing water(Asanovic et al 2020;Saukkonen et al 2015). This type of relaxation was also observed for damp cotton (at 68-95% RH,Morton and Hearle (2008)), paper having different hemicellulose content (at 65% RH, Saukkonen et al(2015)), and viscose/polypropylene fabrics (at 80% RH,Asanovic et al (2020)). Similarly,Einfeldt et al (2001) reported that the dielectric relaxation in cellulose-containing materials strongly depends on the interaction between cellulose and aqueous complexes formed at the polymer-water interface, so it is reasonable to assume that the hemicellulose or lignin removal (i.e., increased availability of cellulose hydroxyl groups) changes the interaction between water molecules and cellulose.…”

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confidence: 99%

“…6b. On the other hand, both cellulose polymorphs (I β and II) coexist in the X-ray diffraction pattern of A30 and A30CuNPs due to the incomplete conversion (57.7%,Ivanovska et al (2020)) from cellulose I β to cellulose II (the reflections for cellulose II (1-10), (110), and (020) are shifted according toFrench (2014), Fig. 6b, bold text).…”

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confidence: 99%

“…Jute fabrics' structural parameters (* The results for fabric thickness and weight were previously published inIvanovska et al 2020) …”

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confidence: 99%

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Electro-physical properties of jute fabrics in a condition of high humidity - Effect of fabric chemical composition and coating with Cu-based nanoparticles

Ivanovska

Maletić

Djokić

et al. 2021

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The electro-physical properties of raw and chemically modified jute fabrics were studied as complex phenomena of the interaction between the fabrics’ chemical composition, crystallinity, moisture sorption, COOH group content, structural characteristics, and frequency of the electric field. At 80% relative air humidity, all chemically modified jute fabrics have 38–179% and 1.7–5.4 times higher dielectric loss tangent and effective relative dielectric permeability compared to unmodified, respectively. To further improve these properties, fabrics were treated with CuSO4 and Cu-based nanoparticles were in situ synthesized on their surface by reduction. A few single Cu-based nanoparticles were observed across the alkali modified fabric’s surface, while single and agglomerated nanoparticles were distributed over the oxidatively modified fabric’s surface. No matter whether metallic Cu or copper oxide (Cu2O or CuO) nanostructures (or their mixtures) are synthesized (proven by XRD), excellent fabrics’ effective relative dielectric permeability is guaranteed. In other words, during the exploitation in specific conditions contributing to copper reduction, the jute fabrics will be able to store 21–163 times more energy from an external electric field than before the exploitation, which further extended their lifetime. On the other hand, with increasing the total content of Cu after the reduction and formation of single and agglomerated Cu-based nanoparticles, the movement of jute structural components’ molecules becomes difficult resulting in lower energy dissipation within the chemically modified than within unmodified fabric. Applied chemical modification and coating with Cu-based nanoparticles enables designing fabrics with predictable electro-physical properties, which is very important from the application point of view.

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Section: Characterization Of Jute Fabricsmentioning

confidence: 99%