Comparative analysis of cellulose nanocrystals and cellulose nanofibrils on the physico‐chemical properties of polyvinyl alcohol/chitosan blend for sustainable food packaging

Fakraoui, Oumaima; Ghorbel, Nouha; Noirel, Cyril; Royaud, Isabelle; Arous, M.; Ayadi, Z. Ben; Kallel, A.

doi:10.1002/app.54024

Cited by 5 publications

(5 citation statements)

References 55 publications

(120 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Differential scanning calorimetry (DSC) experiments were performed in order to identify and gain a better understanding of the distinct relaxation processes occurring within the polymer. 35 DSC thermograms of PLA, obtained from the first and second heating cycles, are shown in Figure 4. The curves have shown almost similar trends indicating a glass transition T g , followed by the polymer cold crystallization T c and the polymer melting T m .…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Correlation between Mechanical and Dielectric Dynamic Behavior Using Fractional Models: Application to Polylactic Acid

Fakraoui,

Arous,

Royaud

et al. 2024

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

The complementarity between mechanical and dielectric properties is crucial, as it facilitates a comprehensive understanding of material behavior, enabling optimal using. This work mainly focuses on the use of broadband dielectric spectroscopy (BDS) and dynamic mechanical analysis (DMA) to investigate the electrical and mechanical aspects of polymer relaxation phenomena. We have opted to conduct experiments on polylactic acid (PLA) due to its well-known use in various applications, attributed to its notable properties and essential relaxation processes. Differential scanning calorimetry (DSC) was used to identify characteristic temperatures for distinguishing different relaxation processes in the polymer. The obtained experimental results were analyzed using the mechanical fractional model (MFM) and the dielectric fractional model (DFM). The fractional model parameters confirm that higher temperatures correlate with increased molecular mobility within macromolecular chains, especially in relaxation processes associated with the glass transition. Subsequently, a fractional calculus approach is employed to investigate the correlation between the complex modulus and complex permittivity of PLA. This correlation model enables the prediction of the real permittivity ε′(T) curve from the real modulus E′(T) data, providing valuable insights into PLA behavior. These results suggest that the correlation model has the potential to predict the dielectric behavior of a polymer based on its mechanical results and vice versa.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Correlation between Mechanical and Dielectric Dynamic Behavior Using Fractional Models: Application to Polylactic Acid

Fakraoui,

Arous,

Royaud

et al. 2024

ACS Appl. Polym. Mater.

Self Cite

View full text Add to dashboard Cite

show abstract

“…9 Moreover, plant-based fibers exhibit commendable mechanical properties, further augmenting their appeal. 10 However, despite these significant merits, natural fibers face a notable challenge in the form of their hydrophilic nature, which hinders their adhesion with relatively hydrophobic matrices. Consequently, this compromises the physical and mechanical properties of composites reinforced with natural fibers.…”

Section: Introductionmentioning

confidence: 99%

Evolution of dielectric properties of Kevlar/epoxy laminated composites after hybridization by naturally woven Coco Nucifera sheaths

Fakraoui

Hammami

Naveen

et al. 2023

Journal of Composite Materials

Self Cite

View full text Add to dashboard Cite

The present work was undertaken to examine the evolution of interfacial properties of Kevlar/epoxy laminated composites hybridized by naturally woven Coco Nucifera sheath (CNS). Hand lay-up method followed by hot pressing was performed to fabricate our laminated composites. Broadband Dielectric Spectroscopy (BDS) was adopted to investigate the effect of varying CNS fractions (0%, 25%, 50%, 75% and 100%) on the molecular dynamics and the interfacial adhesion between Kevlar/epoxy and CNS/epoxy. The surface and cross-section morphology of the samples were studied in order to analyze the weaving structures of Kevlar and CNS and the interfaces between epoxy matrix and reinforcements. Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared Spectroscopy (FTIR) were carried out to control the characteristic temperatures and the interactions between the two kinds of fibers (Kevlar and CNS) and the epoxy resin. The BDS results revealed different relaxations: the conduction phenomenon, the primary [Formula: see text] -process and the interfacial polarization, called also MWS polarization, whose dielectric strength [Formula: see text] was calculated using the WinFit software. Hence, Kevlar fibers can be successfully replaced by 25% of CNS natural fibers for advanced structural applications where interfacial adhesion is prime requirement.

show abstract

“…1,2 In view of its interesting properties, the polymer is widely used in different applications such as in the field of packaging for making biodegradable packaging materials, as a membrane material, in opto-electronics and sensors, in biomedical and drug delivery applications, as vibration damper and so on. [3][4][5][6][7][8][9][10] However, the inherent water solubility of PVA may restrict its uses. Therefore the PVA is crosslinked.…”

Section: Introductionmentioning

confidence: 99%

“…PVA is often blended with other polymers such as chitosan, poly(vinyl pyrrolidone) and so on. 9,16 When mixed with other materials, PVA forms the matrix phase and the other material as reinforcement. Together, the combination may be termed a composite or nanocomposite, depending on whether the reinforcement employed belongs to the micro/macro scale or nanoscale, respectively.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Tensile Properties of Citric Acid Crosslinked Poly(vinyl alcohol) films reinforced with Nano‐Alumina

Sinha,

Ullas

2023

Vinyl Additive Technology

View full text Add to dashboard Cite

Poly(vinyl alcohol) is widely used in many industrial applications due to its attractive physico‐chemical properties. However, water solubility and limited mechanical strength may sometimes restrict its usage. In the present study, an attempt has been made to improve the mechanical properties of the poly(vinyl alcohol) films, particularly the tensile strength, the percentage elongation and Young's modulus. Poly(vinyl alcohol) films were prepared by solution casting. Citric acid is used as a crosslinker and nano‐alumina (0.1–1% w/w) has been added as reinforcement in the crosslinked matrix. Compared to uncrosslinked films, the films containing citric acid demonstrate an increase of ~10% and ~38% in the tensile strength and modulus, respectively. Nano‐alumina acted as a suitable reinforcement and enhanced the tensile strength and modulus of crosslinked film by ~20% and ~27%, respectively, at 0.3% (w/w) loading. Uncrosslinked film dissolved in distilled water whereas the crosslinked films underwent swelling which reduced with the addition of nano‐alumina. Crosslinked poly(vinyl alcohol) films reinforced with nano‐alumina thus possess superior properties compared to both uncrosslinked and crosslinked films. The crosslinked nanocomposite films could find immense use as a food packaging material or in making membranes for water desalination.Highlights Poly(vinyl alcohol) chemically crosslinked by citric acid. Nano‐alumina added as reinforcement in crosslinked poly(vinyl alcohol) film. Swelling studies conducted on crosslinked nanocomposite films. Tensile testing results showing the supremacy of crosslinked nanocomposite films over uncrosslinked and crosslinked pure film.

show abstract

Comparative analysis of cellulose nanocrystals and cellulose nanofibrils on the physico‐chemical properties of polyvinyl alcohol/chitosan blend for sustainable food packaging

Cited by 5 publications

References 55 publications

Correlation between Mechanical and Dielectric Dynamic Behavior Using Fractional Models: Application to Polylactic Acid

Correlation between Mechanical and Dielectric Dynamic Behavior Using Fractional Models: Application to Polylactic Acid

Evolution of dielectric properties of Kevlar/epoxy laminated composites after hybridization by naturally woven Coco Nucifera sheaths

Preparation and Tensile Properties of Citric Acid Crosslinked Poly(vinyl alcohol) films reinforced with Nano‐Alumina

Contact Info

Product

Resources

About