Effect of Alkali Treatment on Alfa Fibers Behavior

Mouhoubi, Sabira; Bourahli, M. E. H.; Osmani, Hocine; Abdeslam, S.

doi:10.1080/15440478.2016.1193088

Cited by 57 publications

(15 citation statements)

References 21 publications

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“…On the other hand, the alkali treatment dissolved the amorphous organic components of alfa fibre such as hemicelluloses and lignin which led to the breakdown of the fibre bundle into micro fibrils [21]. Consequently, with the alkali treatment, the effective surface available for contact with the matrix is increased, and the removal of the cementing hemicelluloses enables the cellulose chains to rearrange themselves to increase their crystallinity index [21,26,27]. It is also important to note that PP-A30-N composite has comparable tensile properties to those of PP-H30 material even though the hemp fibre is stiffer than the alfa fibre.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Effect of Recycling Cycles on the Mechanical and Damping Properties of Short Alfa Fibre Reinforced Polypropylene Composite

Abbassi¹,

Assarar²,

Ayad³

et al. 2019

Journal of Renewable Materials

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This paper aims at studying the effect of recycling on the static and dynamic properties of short alfa fibre reinforced polypropylene. For this purpose, alfa fibres reinforced composites were elaborated by an injection moulding process and were subjected to different mechanical recycling cycles. Then, non-recycled and recycled materials were subjected to static tests and Dynamic Mechanical Analysis (DMA) to evaluate the effect of recycling on their behaviour. Besides, the effects of alkali and salt water treatments on the static and dynamic properties of the alfa composite were also investigated. The obtained results show that tensile and flexural properties of alfa fibres reinforced composites decrease during recycling cycles. Moreover, the recycling induces a drop in the storage modulus and enhances the loss factor of these composites. The composites with alfa fibre especially the alkali treated composite show the same resistance to recycling as composites with hemp fibres. Further, SEM observations indicate a decrease in the fibres dimension with the recycling cycles, especially for alfa fibres, which can explain the decrease in the properties of the alfa composite during recycling operations.

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Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

Effect of Recycling Cycles on the Mechanical and Damping Properties of Short Alfa Fibre Reinforced Polypropylene Composite

Abbassi¹,

Assarar²,

Ayad³

et al. 2019

Journal of Renewable Materials

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“…In another work, Mouhoubi et al. revealed that the treatment time is an important parameter for the elimination of the non‐cellulosic matter . Benyahia et al.…”

Section: Introductionmentioning

confidence: 98%

“…Esperato grass (Stippa Tenacissima) or commonly known as alfa, is a widely distributed plant in north Africa (Maghreb region) and south Spain . As all lignocellulosic materials, alfa is mainly composed of a complex network of cellulose (38.8 ‐ 46.1%) hemicellulose (24 ‐ 33.5%) and lignin (19.9 ‐ 24%) . This plant is commonly used in the production of pulp for paper industry .…”

Section: Introductionmentioning

confidence: 99%

“…Nowadays, it is widely used as polymeric reinforcement due to its exceptional properties, which give high performance materials in addition to its biodegradability and renewability . However, the main problem of those natural fibers is their hydrophilic nature, which affects the fiber‐matrix adhesion and causes damages to composite materials . Several treatments are used to improve the fiber‐matrix interface.…”

Section: Introductionmentioning

confidence: 99%

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Non‐Isothermal Curing Kinetics of Alkali‐Treated Alfa Fibers/Polybenzoxazine Composites Using Differential Scanning Calorimetry

2020

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The exploration of curing process of benzoxazine resins, which possess outstanding features, is crucial for practical and advanced applications. In this study, bisphenol A-aniline based benzoxazine (BA-a) composites reinforced with alkali treated alfa fibers (TAF) were prepared. The influence of different loadings of the TAF on the curing kinetics of BA-a was investigated using non-isothermal differential scanning calorimetry (DSC) at different heating rates. Isoconversional integral methods or model free kinetics, namely, the iterative Kissinger-Akahira-Sunose (it-KAS), iterative Flynn-Wall-Ozawa (it-FWO), Sbirrazzuoli methodology (VYA/CE) and Trache-Abdelaziz-Siwa-ni (TAS) methods have been applied to the experimental data in order to evaluate the curing kinetic parameters. The study revealed that the presence of TAF improved the crosslinking reaction of benzoxazine and reduced the activation energy. The pre-exponential factor exhibited the same trend as the activation energy. The reaction model, examined for all composites, showed that all systems were accurately presented by an autocatalytic reaction model. The Avrami-Erofeev model was the most appropriate for describing the cure kinetics and revealed a good agreement with experimental data.

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“…The study carried out to investigate the effect of alkali treatment on the Alfa fiber [11]. These results reveal that the rate of water absorption decreases after the alkali treatment on the fiber.…”

Section: Introductionmentioning

confidence: 99%

Impact Strength, Water Absorption and Chemical Resistance of Untreated and Treated Cordia-Dichotoma Fiber/Polyester Composite

Reddy¹,

Tjprc²

2018

IJMPERD

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Effect of Alkali Treatment on Alfa Fibers Behavior

Cited by 57 publications

References 21 publications

Effect of Recycling Cycles on the Mechanical and Damping Properties of Short Alfa Fibre Reinforced Polypropylene Composite

Effect of Recycling Cycles on the Mechanical and Damping Properties of Short Alfa Fibre Reinforced Polypropylene Composite

Non‐Isothermal Curing Kinetics of Alkali‐Treated Alfa Fibers/Polybenzoxazine Composites Using Differential Scanning Calorimetry

Impact Strength, Water Absorption and Chemical Resistance of Untreated and Treated Cordia-Dichotoma Fiber/Polyester Composite

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