Publications Scientifiques

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Author: search.filters.author.Serier, Aicha

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    Development and characterization of new formulation of biodegradable emulsified film based on polysaccharides blend and microcrystalline wax
    (Walter de Gruyter GmbH, 2023) Aoufi, Djalila; Belloul, Nabila; Serier, Aicha
    The aim of the present work is the development and characterization of new formulation of emulsified films based on soluble starch/sodium alginate blend and microcrystalline wax. The developed films were studied in order to use them as new formulations to produce food packaging. The obtained films were generally homogeneous, thin, and slightly flexible. These films appeared more opaque compared to the non-emulsified film. Incorporation of microcrystalline wax was caused modifications of mechanical properties of films; these modifications were principally due to the formation of amylose-lipid complex. It was found that microcrystalline significantly reduced film water vapor permeability (WVP) of emulsified films. Atomic force microscope (AFM) was used to evaluate surface topography and roughness of the films. The surface topography was significantly affected, in the other word high roughness values were obtained. Microemultion formation in which the microcrystalline wax particles are distributed homogeneously within the polymer matrix was investigated by scanning electron microscopy (SEM). Moreover, the polysaccharides blend/microcrystalline wax emulsified films can be useful as a biodegradable packaging material to maintain the quality of food products.
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    Combustion behavior of polypropylene/polyamide66/clay nanocomposites
    (John Wiley and Sons Ltd, 2017) Kouini, Benalia; Serier, Aicha
    The addition of treated nanoclay as the reinforcement agent modifies the melt behavior of PP/PA66 nanocomposites, but also profoundly decreases the burning rate of reinforced formulations. To modify the flammability of PP/PA66 nanocomposites, various amounts (0–6 wt%) of treated nanoclay were added to improve the fire performance of PP/PA66 nanocomposites. Horizontal flame test according UL94 was used to evaluate the fire performance of the reinforced formulations, and the results proved that the addition of more than 2 wt% treated nanoclay lead the improvements in flame retardancy through the reduced burning rate. The melt behavior of PP/PA66/Nanoclay nanocomposites was also investigated. It is proposed that, in the presence of clay, the combustion surface changed to a compact carbonaceous–silicate structure. When the clay content was 4–6 wt%, the layered silicates became enriched on part of the surface and formed an island-like structure; the islands displayed a loose cinder structure with much higher silicon content, in contrast to a surface with low silicon content in the surrounding polymers substrate. As the clay content continued to increase, the char covered most of the combustion surface and more clay accumulated on the burning surface. In addition, the clay particles promoted the formation of the carbonaceous–silicate structure. The melt behavior of the PP/PA66 nanocomposites was affected with increasing addition of clay
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    The effect of thermoplastic starch on the properties of polypropylene/high density polyethylene blend reinforced by nano-clay
    (Institute of Physics Publishing, 2020) Hammache, Yassine; Serier, Aicha; Chaoui, Saliha
    Polypropylene (PP) and high density polyethylene (HDPE) was melt-blended in pairs at a constant of 80:20 (mm) compositions; this blend is prepared by one-step reactive extrusion in a single-screw extruder. The present study aims to investigate the effect of thermoplastic starch (TPS) on the properties of PP and HDPE blend. This later has been investigated in the absence and presence of maleic anhydride grafted polyethylene (PE-g-MA), and reinforced by nano-clay. All the blends/nano-bio-composites were prepared in an internal mixer. The results indicates changes in the blends in terms of morphological, Mechanical, Thermal, structural and rheological properties. However, the different blends and nano-bio-composites were studied by means of Thermogravimetry (TG), Differential scanning calorimeter (DSC), Melt flow index (MFI), Izod impact (unnotched) tests, Scanning Electron Microscopy (SEM) and x-ray diffraction (XRD).
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    Development and characterization ofbiodegradables packaging obtained frombiopolymers mixture
    (Taylor & Francis, 2018) Aoufi, Djalila; Serier, Aicha
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    Effect of the aggressive environment on the damage of a glass polyester composite developed by hand layup process
    (Hindawi Publishing Corporation, 2015) Belloul, Nabila; Hamadache, Hassiba; Benyahia, Ali Ahmed; Serier, Aicha
    This work treats the behavior of a glass fibre/unsaturated polyester (UP) composite with structural deffects subjected to the attack of two corrosive solutions: H2SO4 and NaOH. The gravimetric analysis, the uptake mass of the resin, and the interfaces in the composite are established according to the proportion of the matrix/composite. The obtained results showed that, in the acidic solution, the glass fibre and the fibre/matrix interface absorption share is more significant than the alkaline solution. While the Fourier transform infrared analysis (FT-IR) of the UP resin revealed the presence of chemical degradation phenomenon (hydrolysis), the fibre corrosion was characterized by the atomic absorption analysis (AAS). The fibres/matrix interfaces degradation was confrmed by microscopic observations (SEM). The difusion kinetics of the both acid and alkaline solutions and chemical and mechanical degradation are afected by the presence of the pores in elaborated material
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    Elaboration of cellulose based nanobiocomposite : effect of cellulose nanocrystals surface treatment and interface "melting"
    (Elsevier, 2015) Timhadjelt, Lamia; Serier, Aicha; Belgacem, Mohammed Naceur; Bras, Julien
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    Properties of polypropylene/polyamide nanocomposites prepared by melt processing with a PP-g-MAH compatibilizer
    (Elsevier, 2012) Kouini, Benalia; Serier, Aicha
    This article presents the mechanical properties, fire retardancy behavior and the morphology of polypro- pylene/polyamide66 blends compatibilizedwith PP-g-MAH and modified with nanoclays. AllPP/PA66 for- mulations modified with untreated and treated nanoclays were prepared by using internal mixer and single screw extruder followed by injection molding. Maleic anhydride polypropylene (MAH-g-PP) was used as the compatibilizer and the nanoclays content was varied between 0 and 8 wt.%. The mechanical and flammability properties of PP/PA66 nanocomposites were examined. Also the structure of PP/PA66 nanocomposites has been characterized by the Scanning electron microscopy (SEM) and the X-ray diffrac- tion (XRD). Theobtainedresultsindicatethattheincorporationofnanoclayhasasignificanteffectonthestrengthof PP/PA66 nanocomposites. Furthermore, it was found that SEM and XRD results revealed the intercalation, exfoliation of nanaclays of nanocomposites and the flame retardancy properties were improved signifi- cantly. In addition a good balance of impact strength and flame retardancy was obtained for PP/PA66 nanocomposites in the presence of PP-g-MA compatibilizer
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    Modification of cellulose for an application in the waste water treatment
    (Springer, 2009) Timhadjelt, Lamia; Aissani, Zoubir; Boumerdassi, Karima; Serier, Mohamed; Serier, Aicha
    Today's dramatic shortage of water resources and alarming pollution has recently triggered a lot of research for alternative water resources. This study consists in modifying cellulose by grafting of the amidoxime groups for its use in the adsorption of the Cu2+, Cr3+ and sulphide ions present in industrial waste waters. Cellulose is an abundant biodegradable polymer. The amidoxime groups are strong complexants of metal ions. The grafting is achieved in two steps: cyanoethylation and amidoximation, confirmed by FT-IR. The optimum conditions and the parameters influencing the two reactions are determined by the kjeldahl's method and by FT-IR. The amidoxime quantity is determined by measuring the quantity of the amine functions by HCl proportioning. The implementation of the modified cellulose is intended for the adsorption of the metal ions Cu2+ and Cr3+ and sulphide ions S2− in a double adsorption. The FT-IR analysis reveals that the fixing of metal cations is based on the complexation of the latter with the ligands of the adsorbent. The optimum adsorption was recorded at pH = 6 for a contact time of 5 h and an initial concentration of 10−1M in metals. The desorption of fixed metals is possible by the EDTA, and the re-use of the adsorbent confirms the effectiveness of recycling
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    Effect of temperature and initiator on glass fibre/unsaturated polyester composite : cross-linking, mechanical properties
    (Springer, 2009) Belloul, Nabila; Ahmed-Benyahia, Ali; Serier, Aicha; Ouali, Nourdine
    The influence of temperature (20–60°C) and initiator ratio (1–3%) on the cross- linking and mechanical properties of the matrix resin and of gla ss fibre/unsaturated polyester composite; prepared by hand lay-up process and us ed in marine structures, is studied. Reactivity tests have shown that the effect of temperature in crease is similar to that of initiator ratio. They increase reaction rate and reduce the gelation tim e and exothermic peak. Conversely, the Fourier transform infrared spectroscopy analyses have sh own that the final conversions of styrene and polyester vinyl groups are almost co mplete, and that whatever the chosen operating conditions. Tensile and bending tests have shown that the m echanical properties (Elastic modulus, tensile strength...) are optimal for the samples operated at 40°C with 1% of initiator and those operated at 20°C with 2% of initiator