Electrical conductivity of natural rubber–cellulose II nanocomposites

Ortiz-Serna, P.; Carsí, Manuel; Redondo-Foj, B.; Sanchı́s, M. J.

doi:10.1016/j.jnoncrysol.2014.09.026

Cited by 21 publications

(6 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A number of works [24,25] have reported on NR-cellulose nanocomposites regarding thermal and dielectric properties. The authors studied dry and wet NR nanocomposites with large filler content (in the range of 0 to 30 phr) to evaluate the water effect and the filler content on the α dipolar relaxation associated with the NR glass temperature transition.…”

Section: Introductionmentioning

confidence: 99%

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

Ladhar

Arous

Kaddami

et al. 2015

Journal of Molecular Liquids

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

Ladhar

Arous

Kaddami

et al. 2015

Journal of Molecular Liquids

View full text Add to dashboard Cite

“…This behavior is known as the nearly constant loss (NCL) regime. It is related to the frequency range where the ε* value is nearly independent of frequency [36].…”

Section: Temperature Dependent Conductivity Studiesmentioning

confidence: 99%

“…Similar results have been found in some nanocomposite systems, comprising conducting and insulating phase network. Ortiz-Serna et al [36] explained this discordance by weak contacts between the fillers.…”

Section: Temperature Dependent Conductivity Studiesmentioning

confidence: 99%

Dielectric and Electrical Properties of Poly (?-Caprolactone)/ Organomodified Clay Bionanocomposites Prepared in Open Air by in Situ Polymerization

Hrichi

Arous²,

Raihane³

et al. 2019

JAP

View full text Add to dashboard Cite

Dielectric and electrical properties of bio-nanocomposites based on poly (?-caprolactone) (PCL) with different amounts of organomodified montmorillonite clay (MMT-ODA) were investigated by broadband dielectric spectroscopy in the frequency range from 1Hz to 1MHz and in the temperature range from -100 to 25°C. These nanocomposites were prepared by in situ Ring Opening polymerization of ?-caprolactone in open air by using titanium alkoxide as a catalyst. Due to the semicrystalline structure of PCL, the high number of modes and its overlap, the relaxation patterns observed on dielectric spectra were complicated. These relaxation data were modeled using the H-N empirical equation with the contribution of conductivity. The local dynamics of PCL were unaffected by the increase of nano-clay amount, in agreement with the DSC values of glass transition temperature. The PCL/MMT-ODA 3 wt% exhibited the lowest value of dielectric strength, indicating the strongest adhesion between PCL matrix and organo-modified clay. As for PCL/MMT-ODA 5 wt%, the presence of agglomerate made the adhesion between PCL and MMT-ODA very weak. The obtained findings were congruent FTIR and XRD results. The electrical conductivity of PCL was analysed according to the Jonscher’s law. The obtained exponent s values referred to three models corresponding to different temperature ranges.

show abstract

“…[34][35][36][37][38] The dielectric behavior of various forms of cellulose has been studied before with a diversity of relaxation processes, depending the frequency and temperature range, water content, level of crystallinity, shape, size, and pretreatment. [39][40][41][42] Some reagents have the ability to swell cellulose, like water, which can penetrate only the amorphous regions, causing intercrystalline swelling. Cellulose-water interactions are a result of the hydrogen bonds between cellulose's hydroxyl groups and water molecules.…”

Section: Introductionmentioning

confidence: 99%

The effect of micro‐fibrillated cellulose upon the dielectric relaxations and DC conductivity in thermoplastic starch bio‐composites

Drakopoulos

Karger‐Kocsis

Psarras

2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

Thermoplastic starch (TPS) bio‐composites were prepared with natural rubber latex (NR) and/or cellulose microfibers of variable size, as reinforcements. The relaxation processes are investigated via broadband dielectric spectroscopy in a broad temperature and frequency range. By means of the electric modulus formalism, the dynamic glass‐to‐rubber transition process of the starch‐rich regions in TPS (α‐relaxation), and the presence of water molecules at the interfaces between the TPS matrix and the fillers (MWR‐IP), is observed and discussed. The dielectric behavior and energy storage were found to be affected by the presence of the aforementioned water molecules, hindering the polarizability of the samples due to hydrogen bonding with the hydrophilic constituents. Following the temperature dynamics of the α‐relaxation, good adhesion between the TPS matrix and the cellulose microfibers was revealed, although the addition of natural rubber latex microparticles has the opposite effect attributed to their hydrophobic character. Finally, the dc conductivity was estimated from the ac dielectric spectra with a new mathematical formulation that is introduced here, and showed nonlinear temperature dependence for all the samples under study. The purpose of this study is to investigate the use of biodegradable eco‐friendly thermoplastic starch bio‐composites as dielectric materials for capacitor applications. Microfibrillated cellulose and/or natural rubber latex are employed as reinforcements and insight upon their dielectric relaxation behavior is provided by broadband dielectric spectroscopy in a broad temperature and frequency range.

show abstract

Electrical conductivity of natural rubber–cellulose II nanocomposites

Cited by 21 publications

References 42 publications

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

AC and DC electrical conductivity in natural rubber/nanofibrillated cellulose nanocomposites

Dielectric and Electrical Properties of Poly (?-Caprolactone)/ Organomodified Clay Bionanocomposites Prepared in Open Air by in Situ Polymerization

The effect of micro‐fibrillated cellulose upon the dielectric relaxations and DC conductivity in thermoplastic starch bio‐composites

Contact Info

Product

Resources

About