Cellulose Whiskers Micro-Fibers Effect in the Mechanical Proprieties of PP and PLA Composites Fibers Obtained by Spinning Process

Gherissi, Abderraouf; Cheikh, Ridha Ben; Devaux, Éric; Abbassi, Fethi

doi:10.4028/www.scientific.net/amm.146.12

Cited by 5 publications

(4 citation statements)

References 5 publications

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“…This increment suggests that MCC contributes to the mass of the composite lament due to its inherent density and rigidity. This is also supported by previous ndings (González et al, 2023) (Korkmaz Memiş & Kaplan, 2021) (Gherissi et al, 2012). Furthermore, SMPU-MCC microcomposite laments with draw ratio of 3.2 exhibit the lowest linear density (170.2dtex at original shape and 168.6dtex at xed temporary shape), suggesting that higher draw ratios decrease mass per unit length of the laments.…”

Section: Physical and Mechanical Properties Of Filamentssupporting

confidence: 86%

Effect of Draw Ratio and Triggering Temperature on Properties of Hydrothermal Responsive Shape Memory Microcomposite Filaments.

Semanie,

Zhang,

Yesuf

et al. 2024

Preprint

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This paper investigates the production of hydrothermal responsive shape memory filaments with different draw ratios (0.8, 2.0, and 3.2), using microcrystalline cellulose (MCC) as a filler and shape memory polyurethane (SMPU) as a matrix. A mechanical-thermo-aqueous programming test (MTAP) was conducted to study the shape-memory properties of the microcomposite filaments. The effect of draw ratio and triggering temperature on mechanical, physical, thermal, morphological, and shape memory performances was thoroughly studied. Among the microcomposite filaments, SMPU-MCC with a draw ratio of 2.0 exhibited the highest tenacity value of 0.91 cN/dtex in its original shape, with an elongation percentage of 385.2%. The differential scanning calorimetry (DSC) results showed that the glass transition temperature (Tg) of the filaments increased as the draw ratio increased from 0.8 to 3.2, ranging from 38.35°C to 41.02°C. The crystallinity percentages obtained for pure SMPU, SMPU-MCC-0.8, SMPU-MCC-2.0, and SMPU-MCC-3.2 were 27.10%, 30.68%, 38.72%, and 36.88%, respectively. In addition, an optimum draw ratio led to a degradation temperature rise from 372.5ºC to 391.3ºC, which shows the thermal stability of the filaments was significantly influenced by the intermolecular bonding between MCC and SMPU, which intensified as the draw ratio increased from 0.8 to 2.0. Moreover, the filaments exhibited excellent mechanical and thermal properties in six cycles at the optimum draw ratio and triggering temperature, indicating their future application for repeated use without experiencing major changes in shape memory properties.

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Section: Physical and Mechanical Properties Of Filamentssupporting

confidence: 86%

Effect of Draw Ratio and Triggering Temperature on Properties of Hydrothermal Responsive Shape Memory Microcomposite Filaments.

Semanie,

Zhang,

Yesuf

et al. 2024

Preprint

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“…The extraction of CMF from Alfa plant was carried out following a protocol that was described by Ben Brahim and Ben Cheikh [28] and Gherissi et al. [30].…”

Section: Methodsmentioning

confidence: 99%

“…All these methods lead to different types of CNF, depending on the cellulose raw materials, its pre-treatment, and on the disintegration process [27]. The use of Alfa fibres to produce nanocomposites using thermoplastic materials has been recently published [28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Production of cellulose nanofibers from Alfa grass and application as reinforcement for polyvinyl alcohol

Cheikh

Cunha

et al. 2018

Plastics, Rubber and Composites

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The work reported demonstrates an simple method of extracting cellulose nanofibers (CNF) from cellulose microfibers (CMF) obtained from the plant Stipatenacissima. Here, a method for the production of CNF from CMF extracted from Alfa grass by exfoliation in polyvinyl alcohol (PVA) solution, is demonstrated. The CMF were produced in powder form and exfoliated in PVA aqueous solution to produce composites with 2, 4, 5 and 10 wt-% of CNF. Scanning Electron Microscopy demonstrated exfoliation of CMF, dispersion of the CNF and wetting by the polymer. The composites were characterised by thermogravimetry, differential scanning calorimetry, X-ray diffraction and tensile testing. The addition of CNF to PVA reduced the crystallinity degree of PVA. The large increase of the Young's modulus from 38 to 113% (relative to pure PVA) for composites with 2 to 10 wt-% of CNF incorporation is consistent with the extensive exfoliation of CMF into CNF and its excellent interface with PVA.

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“…Despite its many advantages, still, PLA has several demerits, such as brittleness, poor toughness, poor impact strength, and poor gas and moisture barrier properties [17]. It is known that by the addition of a few percents of nano to micro-sized particles, the tensile strength of thermoplastic polymers can be considerably increased [18,19]. It was reported that the addition of cellulose nanocrystals to PLA increased its toughness and biodegradability [20].…”

Section: Introductionmentioning

confidence: 99%

Thermomechanical and viscoelastic properties of green composites of PLA using chitin micro-particles as fillers

Hassan

Koyama

2020

J Polym Res

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Many thermoplastic biocomposites made with non-biodegradable polymers as a matrix polymer are not biodegradable. In this work, biodegradable polylactide (PLA)/chitin microparticle composites were successfully prepared by melt blending without using any compatibilizer or processing aid. The effects of the addition of chitin micro-particles to PLA on its thermal stability, physicomechanical properties and microstructures were evaluated by thermo-gravimetric analysis, dynamic mechanical thermal analysis, differential scanning calorimetry, tensile strength measurement, and scanning electron microscopy. It was found that the addition of chitin micro-particle to PLA increased the stiffness, tensile strength, and hydrophobicity of PLA but negatively affected its thermal properties and elongation. The tensile strength exhibited by the pristine PLA was 41.5 MPa, which increased to 48.5 for the chitin loading of 3% but a further increase in the chitin loading resulted in a reduction in tensile strength. The increase in chitin loading resulted in an increase in stiffness of PLA as

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Cellulose Whiskers Micro-Fibers Effect in the Mechanical Proprieties of PP and PLA Composites Fibers Obtained by Spinning Process

Cited by 5 publications

References 5 publications

Effect of Draw Ratio and Triggering Temperature on Properties of Hydrothermal Responsive Shape Memory Microcomposite Filaments.

Effect of Draw Ratio and Triggering Temperature on Properties of Hydrothermal Responsive Shape Memory Microcomposite Filaments.

Production of cellulose nanofibers from Alfa grass and application as reinforcement for polyvinyl alcohol

Thermomechanical and viscoelastic properties of green composites of PLA using chitin micro-particles as fillers

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