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Agadir, Morocco

Boujmal R.,Mohammed V University | Essabir H.,Institute of Nanomaterials and Nanotechnology NANOTECH | Essabir H.,Laboratory Mechanics | Nekhlaoui S.,Mohammed V University | And 3 more authors.
Journal of Biobased Materials and Bioenergy | Year: 2014

This research is interested to produce a composite material based on thermoplastic polymer reinforced with natural fibers. Polypropylene composites were prepared using a lignocellulosic fibers named Henna fibers at different concentration (5, 10, 15, 20, 25, 30 wt.%). Henna fibers were alkali treated to remove waxes and non cellulosic component. Fiber-matrix adhesion was assured by styrene-(ethylene-butene)-styrene triblock copolymer grafted with maleic anhydride (SEBS-g-MA). Scanning Electron Microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), tensile and torsional tests were employed for composites with and without compatibilizer. Results show a clear improvement in mechanical properties from the use of alkali treated henna to neat and compatibilized polypropylene, a gain of 9% and 12% respectively in the Young's modulus, as a results of improved adhesion between fibers and matrix at the interface. Tensile strength curve shows a remarkable stabilization when the coupling agent was used. Copyright © 2014 American Scientific Publishers


Essabir H.,Institute of Nanomaterials and Nanotechnology NANOTECH | Essabir H.,Laboratory Mechanics | Elkhaoulani A.,Arabishe Deutsch Akademie fur Wissertschaft und Technology | Benmoussa K.,Institute of Nanomaterials and Nanotechnology NANOTECH | And 3 more authors.
Materials and Design | Year: 2013

Doum palm fibers are an environmentally friendly reinforcement in polymer composites. Their mechanical properties and abundance allow its use as an innovative material composite. In this paper doum fibers were alkali treated to clean their surface and enhance polymer fibers interaction. Tensile and rheological properties were investigated to see the effect of fibers content on the composites properties. Also, comparative composites were processed to assure a good wettability between fibers and the polymer with the use of a coupling agent as styrene-(ethylene-butene)-styrene three-block copolymer grafted with maleic anhydride (SEBS-g-MA). Results shows that tensile properties was enhanced when fiber were added to the polymer and has enhanced more with the use of coupling agent. A gain of 70% and 77% in the Young's modulus at 30. wt.% fibers content for the binary and ternary composites, respectively. And a gain of 18% in tensile strength at 10. wt.% fibers content for the ternary composites. Moreover, dynamic mechanical thermal analyses were carried out in order to compare the changes of the properties with frequency, fibers loading, temperature and compatibilizer. © 2013 Elsevier Ltd.


Essabir H.,Institute of Nanomaterials and Nanotechnology NANOTECH | Essabir H.,Laboratory Mechanics | Nekhlaoui S.,Mohammed V University | Malha M.,Mohammed V University | And 4 more authors.
Materials and Design | Year: 2013

In this work, Almond Shells (ASs) particles are used as reinforcement in a thermoplastic matrix as polypropylene (PP). Composites containing Almond Shells (ASs) particles with and without compatibilizer (maleic anhydride grafted polypropylene; SEBS-g-MA) for various particle content (5, 10, 15, 20, 25, 30. wt.%) was investigated by means of studying their mechanical, thermal and rheological properties. The composites were prepared in a twin-screw extruder and assessed by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), tensile testing and Dynamic Mechanical Analysis (DMA). Results show a clear improvement in mechanical and rheological properties from the use of Almond Shells particles in the matrix without and with maleic anhydride compatibilizer, corresponding to a gain in Young's modulus of 56.2% and 35% respectively, at 30. wt.% particle loading. Thermal analysis revealed that incorporation of particle in the composites resulted in increase in the initial thermal decomposition temperatures. © 2013 Elsevier Ltd.


Essabir H.,Laboratory Mechanics | Hilali E.,Laboratory Mechanics | Elgharad A.,Normal Superior School of Technical Education Oran | El Minor H.,Laboratory Mechanics | And 3 more authors.
Materials and Design | Year: 2013

This study treats the combined effects of both particle sizes and particle loading on the mechanical and thermal properties of polypropylene (PP) composites reinforced with Nut-shells of Argan (NA) particles. Three range sizes of particles were used in the presence of a polypropylene matrix grafted with 8. wt.% of a linear block copolymer based on styrene and butadiene coupling agent, to improve adhesion between the particles and the matrix. The composites were prepared through melt-blending using an internal mixer and the tensile specimens were prepared using a hot press molding machine. Scanning Electron Microscopy (SEM), Fourier Transform Infrared Spectroscopy (FT-IR), Thermo Gravimetric Analysis (TGA), Differential Thermal Analysis (DTA) and tensile tests were employed to characterize the composites at 10, 15, 20 and 25. wt.% particle contents. Results show a clear improvement in Young's modulus from the use of particles when compared to the neat PP, a gain of 42.65%, 26.7% and 2.9% at 20. wt.% particle loading, for particle range 1, 2 and 3, respectively. In addition a notable increase in the Young's modulus was observed when decrease the particle size. The thermal stability of composites exhibits a slight decrease (256-230. °C) with particles loading from 10 to 25. wt.%, against neat PP (258. °C). © 2013 Elsevier Ltd.

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