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Bouhfid R.,Institute of Nanomaterials and Nanotechnology NANOTECH | Arrakhiz F.Z.,Institute of Nanomaterials and Nanotechnology NANOTECH | Qaiss A.,Institute of Nanomaterials and Nanotechnology NANOTECH
Polymer Composites | Year: 2016

Polyamide 6 (PA6) and acrylonitrile butadiene styrene blend reinforced by graphene nanosheets (GNs) nanocomposites were prepared by batch system followed by hot compression to get samples for different tests. A low amounts of graphene were used (1, 2, 3, 4 wt%), with this selected loading range, the mechanical properties (Young's modulus) have increased linearly with GNs contents. However, it is observed stability in the tensile strength. The electrical and rheological properties are well characterized and have shown that the evolution of the properties runs through a threshold loading charge. The results are related to the blends morphology, and SEM images showed selective preferential localization in the polyamide 6 phase. Moreover, the presence of GNs in the blends has reduced the surface tension between the two polymers. © 2014 Society of Plastics Engineers. Source


Essabir H.,Institute of Nanomaterials and Nanotechnology NANOTECH | Essabir H.,University Ibn Zohr | Bensalah M.O.,Mohammed V University | Bouhfid R.,Institute of Nanomaterials and Nanotechnology NANOTECH | Qaiss A.,Institute of Nanomaterials and Nanotechnology NANOTECH
Journal of Biobased Materials and Bioenergy | Year: 2014

Talc is widely used as a fine powder in several industrial products to improve the mechanical characteristics of the compound enhancing the nucleation of the polymer and the dimensional stability of the end product. However the polymer composite materials with vegetable fillers were an attractive field for many industries and researchers. The Talc and Apricot shells (AS) particles were compounded in high density polyethylene (HDPE) matrix at various contents and extruded as continuous strands. This work evaluates the structural, thermal, mechanical and rheological properties of Talc and Apricot shells (AS) particles reinforced HDPE. Young's modulus results shows a gain of 45% in HDPE/Talc composites and 33% in HDPE/AS composites compared to neat polymer at 30 wt.% fillers loading. The presence of the particles improved also the rheological properties, which was represented by the complex modulus and loss factor. The thermal analysis shows an increase in the initial thermal decomposition temperatures with addition of talc, 436.9 °C at 30 wt.% filler content. However, results show that the use of AS particles reduces the degradation temperature of composites (352 °C at 30 wt.% filler content), which is normal with the addition of a low degradation temperature charge. Copyright © 2014 American Scientific Publishers Source


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 Source


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. Source


Elkhaoulani A.,Arabishe Deutsch Akademie fur Wissertschaft und Technology | Arrakhiz F.Z.,Institute of Nanomaterials and Nanotechnology NANOTECH | Benmoussa K.,Institute of Nanomaterials and Nanotechnology NANOTECH | Bouhfid R.,Institute of Nanomaterials and Nanotechnology NANOTECH | Qaiss A.,Institute of Nanomaterials and Nanotechnology NANOTECH
Materials and Design | Year: 2013

Moroccan hemp is a cellulosic fiber obtained from the north of Morocco. Their use as reinforcement in thermoplastic matrix composite requires a knowledge of their morphology and structure. In this paper the Moroccan hemp fiber was alkali treated to remove waxes and noncellulosic surface components. Fiber/matrix adhesion was assured by the use of a styrene-(ethylene-butene)-styrene three-block copolymer grafted with maleic anhydride (SEBS-g-MA) as a compatibilizer. Scanning electron microscopy (SEM), Fourier transforms infrared spectroscopy (FT-IR), Thermogravimetric analysis (TGA), tensile and torsional tests were carried out for hemp fibers polypropylene composite and the compatibilized composite at different fiber content. Thus, the binary composite PP/hemp fibers (Alk) and ternary system with maleic anhydride indicate clearly an improved adhesion of the fiber to the matrix as results of the good interaction at the interface. A gain of 50% on the Young's modulus of PP/hemp 25. wt.% without coupling agent and 74% on the PP/hemp 20. wt.% composite with the coupling agent were found. Tensile strength curve shows a remarkable stabilization when the coupling agent was used. © 2013 Elsevier Ltd. Source

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