Dielectric Spectroscopy: An Efficient Tool to Study the Interfacial Adhesion and Properties of Natural Rubber/Nanocellulose‐Based Green Nanocomposites

Ladhar, A.; Bendahou, Abdelkader; Arous, M.; Dufresne, Alain; Kaddami, Hamid

doi:10.1002/9783527689972.ch19

Cited by 5 publications

(4 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, CNWs produce more interfaces with NR, and thus the trapped charges at interface are more important for CNW-based nanocomposites. Therefore, the interfacial polarization appears more intense and in terms of conductivity these entities restrict the interfacial pathway for charge carriers and limit their motion so charge carriers movements could be easier at the NR-CNW interfaces [6,14,30,31]. All these characterizations confirmed the conclusion that the interfacial adhesion in the case of NFC/NR nanocomposite is higher than that of NR/CNW one.…”

Section: Nr-cnw 1%mentioning

confidence: 88%

Study of nanocomposites based on cellulose nanoparticles and natural rubber latex by ATR/FTIR spectroscopy: The impact of reinforcement

Agrebi

Ghorbel

Bresson³

et al. 2018

Polymer Composites

View full text Add to dashboard Cite

In materials research, polymer nanocomposites have attracted great attention worldwide from both academic and industrial points of view. The material properties of polymers can be enhanced dramatically by incorporating nanoelements from renewable resources depending on their biological origin (e.g., cellulose, starch, and chitin). We have used as the reinforcing phase, in this work, cellulose nanowhiskers (CNWs) and nanofibrillated cellulose (NFC) to prepare nanocomposite films by casting/evaporation using natural rubber (NR) latex as the matrix. Our interest is focused, in this work, especially on the investigation of the chemical bonds of the NR matrix and the chemical links of nanowhiskers added to the matrix and therefore the physical and chemical interactions which could happen between the reinforcement and the matrix. Many techniques have been used to explore the interface. Among these techniques, attenuated total reflectance/Fourier transform infrared spectroscopy (ATR/FTIR), which is employed in this work. It is exhibited that some differences are observed in FTIR spectra of nanocomposite films when adding cellulose nanoparticles into NR matrix. Overall IR spectroscopy clearly demonstrated that the interfacial adhesion in the case of NR‐NFC nanocomposite is higher than that of NR‐CNW one which was explained by the presence of residual lignin at the NFC surface that play the role of “compatibilizing” agent that enhance the adhesion between the NFC and the NR. POLYM. COMPOS., 2018. © 2018 Society of Plastics Engineers

show abstract

Section: Nr-cnw 1%mentioning

confidence: 88%

Study of nanocomposites based on cellulose nanoparticles and natural rubber latex by ATR/FTIR spectroscopy: The impact of reinforcement

Agrebi

Ghorbel

Bresson³

et al. 2018

Polymer Composites

View full text Add to dashboard Cite

show abstract

“…The transport property of elastomer composites is closely related to their composition and the character of each parent component. 25 It is known that NR is a typical nonpolar elastomer with hydrophobic character while RC is a hydrophilic polymer containing large amounts of −OH groups, which could attract water molecules through hydrogen bonding 26 and therefore facilitate water diffusion. The evolution of water absorption for various samples as a function of time is presented in Figure 3.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Reinforcement of Natural Rubber: The Use of in Situ Regenerated Cellulose from Alkaline–Urea–Aqueous System

Luo

et al. 2017

Macromolecules

Self Cite

View full text Add to dashboard Cite

Cellulose, especially cellulose nanocrystal and cellulose nanofibril, has captured much attention as a bio-based candidate for the reinforcement of elastomers, but data in the use of regenerated cellulose (RC) from alkaline−urea− aqueous system as reinforcing agent remain scarce. In this contribution, fully bio-based hybrids were produced by flocculating a mixture of natural rubber (NR) latex and cellulose alkaline−urea−aqueous solution, during which NR latex particles were demulsificated to form the polymeric matrix while the porous honeycomb-like RC phase was also generated due to the coagulant-induced gelation, indicating that both the matrix and the filler were synchronously in situ formed by the bottom-up route. RC possesses a unique honeycomb-like structure which apparently could induce extensive physical entanglements, making the filler tightly interlocked with the matrix and therefore favoring the stress transfer. Predictably, RC, without any chemical modification, could endow NR with a pronounced reinforcement. Overall, this work provides (i) a unique inspiration for reinforcing NR with honeycomb-like cellulose and (ii) a better understanding of how could RC truly reinforce NR composites.

show abstract

“…The dielectric loss tangent (tan

δ

) is the ratio of the imaginary and real part of permittivity (ε'′/ ε') and measures the energy dissipation or damping 45 . The inspection of Figure 8D–F show a dielectric loss tangent less than 1% for all materials except for CS‐CNC‐5%, this means that not all the energy stored by the nanocomposite films is dissipated as heat, particularly at low frequencies where all polarization mechanisms are active.…”

Section: Resultsmentioning

confidence: 99%

“…The dielectric loss tangent (tan δ) is the ratio of the imaginary and real part of permittivity (ε' 0 / ε') and measures the energy dissipation or damping. 45 The inspection of Figure 8D-F show a dielectric loss tangent less than 1% for all materials except for CS-CNC-5%, this means that not all the energy stored by the nanocomposite films is dissipated as heat, particularly at low frequencies where all polarization mechanisms are active. The high dielectric loss was mainly observed at low frequencies (Figure S4) which is due the participation of the dipolar molecules or groups or amino groups in the films that can rotate and vibrate in response to the applied electric field, moreover, undetectable factors such as moisture content absorbed during the analysis, ionic impurities such residual salts, nano-cracks or voids can lead to localized regions of high electric field strength and contribute to dielectric loss even at low frequencies, additionally the presence of Warburg impedance indicating the presence of the free charge at the interface will likely causes high dielectric loss due to their longest response to the dielectric field.…”

Section: Dielectric Properties Of Cs-cn Nanocomposite Filmsmentioning

confidence: 90%

Dielectric, transparent, thermally stable and mechanically robust bionanocomposite films based on chitosan and modified cellulose nanocrystals

Kassab,

Abdellaoui,

Idouhli

et al. 2024

Polymer Composites

View full text Add to dashboard Cite

The growing demand for electronics necessitates the development of novel environmentally responsible materials. A potential approach involves incorporating renewable and sustainable materials with mechanical and electrical properties while ensuring environmentally friendly disposal. Herein, this study reports the dielectric properties of chitosan (CS) reinforced with cellulose nanocrystals (CN) extracted from post‐harvest tomato plant residue. The resulting bionanocomposite material demonstrated remarkable characteristics, including dielectricity, transparency, thermal stability, and mechanical robustness. Additionally, the effect of high‐loading fillers (5 and 10 wt %) on the final properties of the material is investigated, as well as the effect of surface functionality of the CNs. The results showed that both the high‐loading fillers and the surface functionality of the CNs had a significant impact on the properties of the nanocomposite material. The bionanocomposite materials produced in this study hold great potential as an eco‐friendly substitute for conventional electronic materials and beyond. Its dielectric, transparent, thermally stable, and mechanically robust properties render it well‐suited for diverse applications.Highlights The phosphorylated groups insured high Crl (%) and high interface between the filler and matrix. High interface and crystallinity enhanced the mechanical characteristics. Low crystallinity increases the dielectric constant, case of 5% CNS. Filler’ type can tailor and optimize the energy dissipation up to tan δ = 0.5 for 5% CNP. Detection of Warburg impedance proves the interface polarization presence.

show abstract

Dielectric Spectroscopy: An Efficient Tool to Study the Interfacial Adhesion and Properties of Natural Rubber/Nanocellulose‐Based Green Nanocomposites

Cited by 5 publications

References 60 publications

Study of nanocomposites based on cellulose nanoparticles and natural rubber latex by ATR/FTIR spectroscopy: The impact of reinforcement

Study of nanocomposites based on cellulose nanoparticles and natural rubber latex by ATR/FTIR spectroscopy: The impact of reinforcement

Reinforcement of Natural Rubber: The Use of in Situ Regenerated Cellulose from Alkaline–Urea–Aqueous System

Dielectric, transparent, thermally stable and mechanically robust bionanocomposite films based on chitosan and modified cellulose nanocrystals

Contact Info

Product

Resources

About