Extraction of oxidized nanocellulose from date palm (Phoenix Dactylifera L.) sheath fibers: Influence of CI and CII polymorphs on the properties of chitosan/bionanocomposite films

Adel, Abeer M.; El-Shafei, A.; Ibrahim, A. A.; Al–Shemy, Mona T.

doi:10.1016/j.indcrop.2018.07.073

Cited by 49 publications

(14 citation statements)

References 43 publications

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“…In addition, the chemical composition of the bleached pulp shows how the bleaching process drastically reduces the lignin content in fiber, increasing the content of a-cellulose and mostly remaining the hemicellulose content in fiber, in comparison with the unbleached pulp. Comparatively, the a-cellulose content of wheat straw cellulosic pulps was similar or higher to the values presented by other cellulosic pulps from agricultural residues such as cereal straws (Espinosa et al 2017b), corncob residue (Liu et al 2016), banana leaves (Tarrés et al 2017b) and date palm (Adel et al 2018). Due to the benign conditions of the pulping process, a significant part of the hemicelluloses contained in the fiber is maintained, even after the bleaching process.…”

Section: Resultssupporting

confidence: 64%

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

et al. 2020

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The aim of this work is to study and compare the influence of different nanofibrillation processes on the properties of cellulose nanofibers from wheat straw, and analyze the effect of the lignin in the nanocellulose quality and on the characteristics of the films produced. Wheat straw was subjected to a soda (NaOH) pulping process to obtain unbleached cellulosic pulp. The cellulosic pulp was bleached with NaClO 2 in order to remove the lignin of the fiber. Both bleached and unbleached pulps were used to obtain nanocellulose using mechanical pretreatment (PFI refining) and treatments, (high pressure homogenization, twin-screw extruder and ultrafine friction grinder). The effect of the nanofibrillation treatments and the residual lignin content on cellulose nanofiber production was analyzed by means of a deep characterization. A multi-factorial quality index was used to score the cellulose nanofibers produced to enable a benchmarking study between different sources, processes and characteristics. In addition, an energetic study of the production process was carried out for the different treatments. The different nanofibers were used to produce cellulose nanofiber-based films and characterized in order to establish a relationship between the characteristics of cellulose nanofibers and the characteristics of the final product.

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Section: Resultssupporting

confidence: 64%

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

et al. 2020

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“…Comparative arguments were presented by other researchers [36]. DPF usually has a cylindrical shape, consisting of a parallel assembly of microfibrils, with considerable amounts of non-cellulosic elements on the fiber surface, including waxes, natural oils, lignin, hemicellulose, pectin, and other impurities specific to the Arabian and Saharan areas [25,26,28,31,72,73]. The cylindrical strand shape of DPF is observed in all the composites, although it is more clearly visible in the L/epoxy and G/epoxy composites, as also reported in the literature [36].…”

Section: Resultsmentioning

confidence: 99%

“…The chemical composition of the extracted DPF was investigated in accordance with TAPPI standards [25] and the results were tabulated in Table 2.…”

Section: Methodsmentioning

confidence: 99%

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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“…More recently, nanoscale date-palm fillers have been used in packaging and dental applications [40]. Adel et al [41] extracted oxidized nanocellulose from date palm sheath fibers, and used it as a packaging additive in chitosan films. Salih et al [42] created maxillary denture bases from composites of Poly(methyl methacrylate) (PMMA) reinforced with nanoscale pressed date (Ajwa) powder.…”

Section: Introductionmentioning

confidence: 99%

Eco-friendly date-seed nanofillers for polyethylene terephthalate composite reinforcement

Elkhouly

Rushdi

Abdel-Magied

2020

Mater. Res. Express

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Polymer composites have been widely exploited in numerous industries. Micro-particle fillers are typically added as reinforcement materials to improve the characteristics of these composites. In this work, organic nanoparticles of date seeds were added as a filler for polyethylene terephthalate (PET) to produce enhanced polymer nanocomposites. A date-seed nanofiller (DSN) was prepared and examined with x-ray diffraction measurements, and then added to PET by hot compression. The characteristics of the PET-DSN composite were experimentally investigated through tests of mass loss, compressive strength, and Vickers micro-hardness. The PET-DSN microstructure was inspected using a scanning electron microscope and Fourier-transform infrared spectroscopy. The results show chemical stability of the PET-DSN composite. Moreover, key mechanical properties of the composite, namely hardness, compressive strength and wear resistance, were improved and optimized with a DSN reinforcement of 0.75 wt%.

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Extraction of oxidized nanocellulose from date palm (Phoenix Dactylifera L.) sheath fibers: Influence of CI and CII polymorphs on the properties of chitosan/bionanocomposite films

Cited by 49 publications

References 43 publications

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

Use of multi-factorial analysis to determine the quality of cellulose nanofibers: effect of nanofibrillation treatment and residual lignin content

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

Eco-friendly date-seed nanofillers for polyethylene terephthalate composite reinforcement

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