Thermomechanical behavior of Tunisian palm fibers before and after alkalization

Lassoued, Mouna; Mnasri, Taoufik; Hidouri, Abdelmoumen; Younès, Rached Ben

doi:10.1016/j.conbuildmat.2018.03.070

Cited by 27 publications

(10 citation statements)

References 25 publications

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“…These statements are also in line with those of other researchers [58,68]. Noticeably, research has established that thickness swelling minimizes interfacial adhesion [33,69], which governs the mechanical properties. Actually, the water absorption and thickness swelling of natural fiber reinforced polymer composites are some of their main drawbacks, since the presence of moisture results in the degradation of the fiber matrix interface or in delamination, fiber debonding and, finally, the formation of microvoids and interfacial cracks induced by moisture which, in turn, affect their mechanical properties.…”

Section: Resultssupporting

confidence: 91%

“…Remarkably, fibrous bundles or the honeycomb morphology are also visible in the SEM images of all the DPF/epoxy composites. Relatively similar honeycomb structures were noticed in the fracture surface morphology of unidirectional composites comprising date palm petiole fibers [32] and in the surface morphology of untreated date palm petiole fibers from the region of Tozeur (Southern Tunisia) [33].…”

Section: Resultsmentioning

confidence: 79%

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Evaluation of Mechanical, Physical, and Morphological Properties of Epoxy Composites Reinforced with Different Date Palm Fillers

et al. 2019

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The present study deals with the fabrication of epoxy composites reinforced with 50 wt% of date palm leaf sheath (G), palm tree trunk (L), fruit bunch stalk (AA), and leaf stalk (A) as filler by the hand lay-up technique. The developed composites were characterized and compared in terms of mechanical, physical and morphological properties. Mechanical tests revealed that the addition of AA improves tensile (20.60–40.12 MPa), impact strength (45.71–99.45 J/m), flexural strength (32.11–110.16 MPa) and density (1.13–1.90 g/cm3). The water absorption and thickness swelling values observed in this study were higher for AA/epoxy composite, revealing its higher cellulosic content, compared to the other composite materials. The examination of fiber pull-out, matrix cracks, and fiber dislocations in the microstructure and fractured surface morphology of the developed materials confirmed the trends for mechanical properties. Overall, from results analysis it can be concluded that reinforcing epoxy matrix with AA filler effectively improves the properties of the developed composite materials. Thus, date palm fruit bunch stalk filler might be considered as a sustainable and green promising reinforcing material similarly to other natural fibers and can be used for diverse commercial, structural, and nonstructural applications requiring high mechanical resistance.

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Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 79%

Evaluation of Mechanical, Physical, and Morphological Properties of Epoxy Composites Reinforced with Different Date Palm Fillers

et al. 2019

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“…However, the degradation of natural fillers poses serious drawbacks, such as the decline of the mechanical properties over time. Nonetheless, several research studies have shown that applying a proper chemical treatment may eliminate or slow the degradation process [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

New Synthesis Routes toward Improvement of Natural Filler/Synthetic Polymer Interfacial Crosslinking

et al. 2022

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Among the critical issues dictating bio-composite performance is the interfacial bonding between the natural fibers and polymer matrix. In this regard, this article presents new synthesis routes comprising the treatment and functionalization of both date palm powder (DPP) filler and a polypropylene (PP) matrix to enhance filler–polymer adhesion in the newly developed bio-composites. Specifically, four bio-composite forms are considered: untreated DPP filled PP (DPP-UT/PP), treated DPP filled PP (DPP-T/PP), treated DPP filled functionalized PP using 2-isocyanatoethyl methacrylate (DPP-T/PP-g-IEM), and treated and functionalized DPP using 4-toluenesulfonyl chloride filled functionalized PP using 2-acrylamide ((DPP-T)-g-TsCl/PP-g-AcAm). The functional groups created on the surface of synthesized PP-g-IEM react with activated hydroxyl groups attached to the filler, resulting in chemical crosslinking between both components. Similarly, the reaction of TsCl with NH2 chemical groups residing on the mating surfaces of the filler and polymer generates an amide bond in the interface region. Fourier transform infrared spectroscopy (FTIR) is used to confirm the successful coupling between the filler and polypropylene matrix after applying the treatment and functionalization schemes. Owing to the introduced crosslinking, the DPP-T/PP-g-IEM bio-composite exhibits the best mechanical properties as compared to the neat polymer, unfunctionalized polymer-based bio-composite, and (DPP-T)-g-TsCl/PP-g-AcAm counterpart. The applied compatibilizers assist in reducing the water uptake of the manufactured bio-composites, increasing their durability.

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“…To address poor interfacial adhesion in natural fibre reinforced composites caused by their hydrophilic nature, surface modification treatments like alkalisation, acetylation, bleaching benzoylation, and silane have been used to enhance reinforcement-matrix interfacial adhesion by eliminating the amorphous surface layer from the fibre and enhancing the physical strength of the fibres [10][11][12]. There is a need to review how different researchers have investigated the effect of these different surface modification techniques in natural fibres and the results they attained to enhance qualities like thermal stability, mechanical properties as well as natural fibre hydrophobicity.…”

Section: Introductionmentioning

confidence: 99%

Surface Treatments of Natural Fibres in Fibre Reinforced Composites: A Review

Seisa

Chinnasamy

Ude

2022

Fibres &Amp; Textiles in Eastern Europe

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The use of natural fibres in fibre-reinforced composites comes with drawbacks. They are highly hydrophilic, leading to high moisture absorption and poor interfacial adhesion in matrix-reinforcement bonds. This affects the fibres’ thermal stability as well as mechanical properties, hence limiting their wider application. This paper reviewed different ways in which natural fibres have been treated to improve hydrophobicity, reinforcement-matrix interfacial adhesion and thermal stability. It will investigate. among others, treatments like alkali, acetylation, bleaching, silane, benzoylation and plasma, which have been found to improve fibre hydrophobicity. The literature reviewed showed that these methods work to improve mechanical, chemical, and morphological properties of natural fibres by removing the amorphous surface, thus allowing for more efficient load transfer on the fibre-matrix surface. Studies in the literature found alkali treatment to be the most common surface modification treatment due to its simplicity and effectiveness. However, plasma treatment has emerged due to its lower processing time and chemical consumption. A comparative analysis of other improved properties was also investigated.

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Thermomechanical behavior of Tunisian palm fibers before and after alkalization

Cited by 27 publications

References 25 publications

Evaluation of Mechanical, Physical, and Morphological Properties of Epoxy Composites Reinforced with Different Date Palm Fillers

Evaluation of Mechanical, Physical, and Morphological Properties of Epoxy Composites Reinforced with Different Date Palm Fillers

New Synthesis Routes toward Improvement of Natural Filler/Synthetic Polymer Interfacial Crosslinking

Surface Treatments of Natural Fibres in Fibre Reinforced Composites: A Review

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