Omar Cherkaoui

• PhD de l'université Lyon 1 en france
• R&D Director at École Supérieure des Industries du Textile et de l'Habillement

The increasing adoption of wearable electronic devices across various sectors has driven significant research into flexible radio frequency (RF) antennas to overcome the limitations of traditional metal-based antennas. The demand for lightweight, flexible, and low-profile designs highlights the necessity for innovative solutions in portable electro...

Agriculture 4.0 is a field that has spread widely around the world in this century, as it has undergone an exceptionally rapid evolution, especially when it comes to fruit recognition.Decisions about their quality are crucial to maximize profits and meet customer expectations. In the past, apples or even other fruits were based solely on visual ass...

This study aims to investigate the applicability of carboxymethyl cellulose (CMC) as a binder in insulating panels made from polyester textile waste (PTW), which is the most produced textile waste worldwide. This combination addresses the pressing need to recycle a widely manufactured material while introducing CMC as an environmentally friendly so...

Fabric strength plays a crucial role in determining and influencing all other performance attributes of textiles. Therefore, considering the strength of the fabric becomes essential when choosing the appropriate textile for a specific purpose. This article presents an experimental study that focusses on the properties of 100% polyester fabrics. To...

This study offers a novel method for improving the piezoelectric characteristics of polyvinylidene fluoride (PVDF) by adding lanthanated CoFe2O4 nanoparticles (CLFO), thereby addressing the critical need for effective renewable energy solutions. The novelty of this work lies in the synthesis of CLFO nanoparticles and their integration into the PVDF...

The COVID‐19 pandemic sparked a surge in demand for nonwoven protective materials, prompting a significant increase in nonwoven fabric production. To advance understanding, particularly in the Spunbond process, we conducted experiments to analyze the effects of various input parameters on fiber diameter, and mechanical tests to study how fiber diam...

The multifunctionality of new composite materials based on electroactive polymers has sparked a lot of interest in research because of their potential applications in a variety of fields, including biological and chemical sensors, photocatalytic air and water pollution control, and energy harvesting through piezoelectric and photovoltaic effects. S...

This study presents a low-profile, dual-band microstrip patch antenna (MPA) optimized for wearable applications, with a focus on achieving a low specific absorption rate (SAR). The antenna operates efficiently in the 5.8 GHz ISM (industrial, sci-entific, and medical) band and the 8.3 GHz X-band. A strategically designed C-shaped slot adjusts the re...

This study investigates the impact of phosphate content on the mechanical strength of polyester composites, specifically those reinforced with randomly distributed short glass phosphate fibers. A comprehensive suite of controlled experiments was undertaken to evaluate the tensile and flexural characteristics of these composites, varying the concent...

The relentless drive towards miniaturization and seamless integration of electronic components in wireless communications and wearable devices has significantly increased the demand for flexible, cost‐effective composites with high dielectric constants and low losses. This study presents a wideband, low‐profile, and flexible antenna with excellent...

This article introduces a novel semi-flexible dual-band-printed MIMO antenna designed for 5G communication systems at 26 and 31 GHz in the mm-wave spectrum. The antenna, featuring a radiating decagonal patch with integrated multiple slots, achieves dual-band impedance bandwidth and circular polarization. With notable gains of approximately 8.74 dBi...

This study aims to create fire-resistant performance of polyurethane (PU)-coated textiles by adding wool powder as a flame retardant on both cotton and polyester fabrics. A flame-retardant surface was therefore developed by coating the fabrics with a mixture of PU and wool powder and characterised by using Fourier transform infrared spectroscopy an...

This work focuses on surface modification of an innovative anionic chelating support derived from discarded polyacrylonitrile fiber (PANF) waste. The approach involves transforming nitrile groups into N,N-dicarboxymethyl amide groups through surface functionalization. Key operational parameters such as pH, temperature, chelating agent concentration...

The finishing process in the textile sector is recognized as one of the most complex. This complexity arises from the diversity of structures, the multiple steps involved, the use of complex machinery, the variety of materials, chemicals and dyes, and the need to combine creativity and precision. Therefore, it is crucial to have tools that can impr...

This study focuses on the valorization of the Agave sisalana plant from the southern region of Morocco. The research objective is to enhance the sisal fiber extraction process and examine the impact of various chemical treatments on their mechanical properties, crucial for composite reinforcement. The sisal fibers were mechanically extracted from t...

Titanate and silicate xerogels have garnered considerable attention in the realm of thermal insulation due to their outstanding attributes, encompassing thermal conductivity and fire resistance. This study focused on pioneering a new multifunctional textile by integrating xerogels—both titanate and silicate—as additives for enhancing polycotton fab...

The development of e-textiles necessitates the creation of highly conductive inks that are compatible with precise inkjet printing, which remains a key challenge. This work presents an innovative, syringe-based method to optimize a novel bio-sourced silver ink for inkjet printing on textiles. We investigate the relationships between inks’ compositi...

BACKGROUND Increasing water scarcity as a result of growing demand highlights the urgency for innovative solutions. Seawater desalination is emerging as a crucial answer, with direct contact membrane distillation (DCMD) emerging as a promising technology in this context. In particular, membranes produced from ionic liquids constitute a well‐establi...

La distillation membranaire est un procédé à basse température et à pression ambiante, a été utilisé pour le dessalement, un support constitué d'un mélange de polymères (PVDF) et à base d'un liquide ionique pour améliorer les processus de diffusion de la vapeur d'eau à travers la membrane. La membrane (PVDF/IL) produites ont été caractérisées pour...

The availability of the Agave Sisalana plant in Morocco and the use of this plant only in traditional medicine was the subject of the choice of the Moroccan Agave Sisalana plant in the current study for the development of multilayer woven reinforcement. The variability of natural fiber properties requires a detailed approach to the behavior of pref...

Weaving saturation can have harmful consequences, such as problems with loom performance, accelerated wear of mechanical parts and loss of raw materials. To avoid these problems, when designing and creating new fabrics, the densities and yarn qualities must be carefully matched with the weaves to ensure successful testing. To facilitate this task,...

In 2011, the German government launched the visionary initiative known as Industry 4.0, with the goal of positioning itself at the forefront of cutting-edge manufacturing and the shift towards digital transformation. In the wake of this transformative wave, numerous manufacturers are continuously exploring avenues to bolster their capabilities and...

In the context of digital transformation, to assess the current state of manufacturing companies, a readiness model is proposed in this paper. Using a literature review and a framework considering maturity as an 'input' enabler and not as an 'output'. Three dimensions are considered in this model (Organization maturity, Technology maturity, and Pro...

This work presents a wideband, low-profile, and flexible antenna that incorporates metamaterial (MTM) structures and textile materials. The antenna design is simulated using CST Microwave Studio, incorporating flexible textile elements such as a felt substrate and conductive fabric. The developed antenna's performance was examined numerically in fr...

The capabilities of chitosan for removing anionic dyes as reactive yellow 135 from wastewater of textile industry were examined. The chitosan was extracted from shrimp co-products "PandalusBorrealis" by the hydrothermo-chimical method in two steps. The bio-adsorbent obtained was characterized by infrared spectroscopy (FT-IR), X-ray diffraction (XRD...

In this article, a compact super-wideband flexible textile antenna is proposed. It operates over an extremely broad frequency range from 3.16 to 50 GHz. The proposed design is characterized by its simple geometry, consisting of an offset rectangular patch, which is incorporated with three slots to enhance its performance, while a circular parasitic...

In the realm of fiber surface functionalization, the sol-gel method is a prominent technique. This study aims to demonstrate its effectiveness in depositing fluorescent organic-inorganic hybrid coatings on glass fiber substrates with micron-scale diameter. The coatings were synthesized using chloropropyltriethoxysilane (CPTS) as a Si-precursor and...

This research paper presents the results of an investigation into the formulation of silver conductive ink for use in inkjet printing. The aim of the study is to develop an environmentally friendly and cost-effective ink using a simple and scalable method. To achieve this, silver nanoparticles (AgNPs) were synthesized through a co-reduction approac...

Flexible RF electronics and antennas made from textiles are regarded as a technology that accelerates the widespread popularity of modern wearable communication devices and components. This work presents a flexible and compact 4 × 1 rectangular microstrip patch array antenna for radio frequency (RF) energy harvesting applications. It operates at 5...

This work explored the feasibility of implement of polymer inclusion membranes (PIMs) in the desalination industry. The methyltrioctylammonium oleate (MTOAO) was imbedded in a blend of polyvinylidene fluoride (PVDF) and polysulfone (PSU) prepared via Non-Solvent Induced Phase Separation (NIPS). The investigation encompassed the analysis of the chem...

Titanate xerogels have attracted increasing attention due to their extraordinary properties such as thermal conductivity, fire resistance, hydrophobicity and low density. This work focuses on the development of a new multifunctional textile, based on xerogel as filler for cotton fabric for applications in technical textiles. The microstructure was...

Wool is a popular natural animal fiber that has been used for many years and contributes significantly to the economies of various producing countries and manufacturers. In recent years, the share of wool continues to decline from a source of income for farmers to a waste product, as a result of different production challenges and livestock issues....

Moringa oleifera is a versatile tree whose seeds are used as coagulants in water treatment. The seed husks are usually discarded as waste, since they serve no scientific purpose. In this work, we reported the interest of using this waste to produce a low cost activated carbon, using an improved pyrolysis method with thermal shock under atmospheric...

This paper presents and compares films made using the solution casting method with a mixture of poly (vinylidene fluoride‐co‐hexafluoropropylene) (PVDF‐HFP), graphene oxide (GO), and lead zirconate titanate (PZT). The Hummers' method synthesized GO. Scanning electron microscopy (SEM), Fourier‐transform infrared spectroscopy (FTIR), X‐ray diffractio...

Greater importance should be attributed to finding environmentally friendly processes that are particularly suitable for the textile industry. In this work, we exploit the plant (Reseda luteola L.) for the extract of a natural yellow dye, using the tannic bark of Acacia mearnsii as a bio-mordant to ensure sustainable dyeing of wool fabrics. Four im...

One of the biggest problems facing the use of carbon nanotubes in reinforced composites is agglomeration within the matrix phase. This phenomenon—caused by Van der Waals forces—leads to dispersion problems and weakens the properties of the composites. This research presents a multi-stage homogenization approach used to investigate the influence of...

Wool fibers have been used as textile raw materials for clothing and home textiles for many years. Recently, it has also been increasingly used in technical textile applications. However, man-made fibers dominate the market and minimize the importance of wool in the textile industry. On the other hand, the great future opportunity for wool is the g...

The main objective of this paper aims at investigating the potential use of sisal yarn into composite material despite the inherent variability of properties of natural resources. A multi-scale approach of the behavior of sisal fiber woven reinforcements is conducted to understand and evaluate the different properties of woven reinforcements. At th...

Silica xerogel has attracted increasingly more attention in the field of thermal insulation as its extraordinary properties such as thermal conductivity, fire resistance, hydrophobicity and low density. This work focuses on the development of new insulating material, based on the xerogel as charge for cotton fabric. The composite was developed usin...

In the present work, we studied the effect of adding PZT nanoparticles to PVDF-HFP/PLA matrix on piezoelectric properties of blend-based nanocomposites. Polyvinylidene fluoride hexafluoro-propylene /Polylactic acid /Lead titanate zirconate (PVdF-HFP/PLA/PZT) films nanocomposites were prepared by solvent casting technique using different percentages...

Textile industry is evolving towards limiting the use of synthetic dyes due to their environmental and health concerns. Natural dyes are considered the ultimate alternative as it is green and ecofriendly. However, natural dyeing is limited by the use of metal mordants to enhance the colorimetric and fastness behavior of dyed textiles. In this work,...

Printed electronics technology is one of the most dynamic in the world, allowing for the low-cost fabrication of electronic networks on textile substrates using the inkjet printing technique which is commonly used in various industries. In the field of formulation of conductive inks, silver nanoparticles are generally used as precursors that confer...

In this paper, a monopole Ultra-wideband (UWB) textile antenna is designed and analyzed for RF wireless energy harvesting (RFEH). The intended antenna exhibits excellent characteristics with a compact dimension of 80×60 mm2. In the front plane of the proposed antenna, the microstrip line fed enneagon (nonagon) shaped patch structure has been modifi...

Citation: Ait Oukharaz N., Lakhmiri R., El Fargani H., Eladnani I., Sguillar M., Albourine A., Bazzi L., Safi M., Cherkaoui O. (2023) Application of Castor plant (Ricinus communis L.) as a green sorbent for removing cationic dyes from textile effluents., Mor. J. Chem., Abstract: The present study reports the removal of cationic dyes from water usin...

Nanoporous carbon derived from Moringa oleifera seed waste was synthesized by an original process of flash pyrolysis followed by zinc chloride impregnation. The N2-adsorption–desorption results of the optimized sample revealed a BET surface area of 699.6 m2/g and a pore size of 2 nm. It was evaluated for the adsorption of a mono azo dye, methyl ora...

This study focused on the production and characterization of phosphate glass fibers (PGF) for application as composite reinforcement. Phosphate glasses belonging to the system 52P2O524CaO13MgO (11-(X + Y)) K2OXFe2O3YTiO2 (X:1, 3, 5) and (Y:0.5, 1) were elaborated and converted to phosphate glass fibers. First, their mechanical properties and chemic...

Piezoelectric nanocomposites have attracted considerable attention from researchers in these last years due to their wide field in the development of electromechanical microsystems (MEMS) for energy harvesting applications. In this paper, piezoelectric lead titanate zirconate (PZT) are used with poly (vinylidene fluoride-hexafuoropropylene) (PVdF-H...

Energy harvesting is the most efficient way to meet energy demand while also supplying renewable energy sources from the environment. This technology consists of the recovery of electrical energy from lost energy sources, which are available everywhere, including heat, fluids, vibrations, etc. In particular, energy harvesting via piezoelectric mate...

Printed electronics (PE) is one of the most dynamic technologies in the world. It proposes low-cost electronic network production in flexible substrates by numerous printing techniques, (screen printing, gravure, offset, flexographic, and inkjet printing), used in various industries. In PE, ink pigments are replaced by metallic particles or precurs...

Although polylactic acid (PLA) is widely identified as a biodegradable polymer, its use is limited due to the inherently poor mechanical properties. Therefore, the strengthening of PLA with microscale particles like lead zirconate titanate (PZT) is a promising field of research that has only just begun to be explored. Piezoelectric polymer-PZT film...

Wind energy is the kinetic energy of wind transformed into electrical energy by a system known as a wind turbine. All of the different parts of a wind turbine, like blades, hub, gearbox, nacelle, and tower, blades are usually made of glass and carbon fibers for better strength, lower weight, and better resistance to corrosion. The main limitations...

Wind energy is the kinetic energy of wind transformed into electrical energy by a system known as a wind turbine. All of the different parts of a wind turbine, like blades, hub, gearbox, nacelle, and tower, blades are usually made of glass and carbon fibers for better strength, lower weight, and better resistance to corrosion. The main limitations...

In this work, the main objective is to show the performance of impedance spectroscopy in the optimization of the coagulation process and to highlight the effect of aluminum sulfate in this process. All parameters deduced from the impedance spectrum from the appropriate equivalent circuit such as the hopping conductivity (σho), relaxation time (τ),...

Natural fibers offer good prospective as reinforcements in polymer composites due to their superior properties, they are preferred over synthetic fibers in various applications such as construction, automotive and aerospace. This experimental study emphasizes the effect of nonwoven structure on the mechanical, thermal and biodegradability propertie...

The Zn–Al–Cl Layered Double Hydroxide (Zn–Al–Cl LDH) was synthesized at constant pH by coprecipitation method and then used as an adsorbent for the removal of a reactive azo dye Remazol Red 23 (RR-23). The structural and morphological properties of the synthesized Zn–Al–Cl LDH were determined using X-ray diffraction (XRD), Fourier Transform Infrare...

Because batteries' ability to power portable and wireless devices is limited, a great deal of research has been conducted on energy harvesting technology as a self‐power source for portable devices. Harvesting mechanical energy from human motion is an attractive approach to obtaining green and renewable energy by converting wasted ambient energy to...

Because of their appealing properties, such as biodegradability, high basic stiffness, low density, and low cost, natural fibers have begun to be used in a variety of applications. In comparison to synthetics, they are also reusable. The aim of this work is to develop new woven materials made of wool and Alfa fibers (Stipa-tenacissima). The extract...

In this study, silver nanoparticles were synthesized with a starch-based reduction biosystem at room temperature. With this approach, high concentration silver nanoparticles were produced on a large scale with a low starch/AgNO3 mass ratio, which was very advantageous for the low cost and high conductivity. The silver nanoparticles were characteriz...

In order to study the durability of cementitious composites with polypropylene fibers, several experimental tests have been carried out. In this study, the durability was studied using three major indicators which can be summarized in: the porosity accessible to water εb, the permeability to Kapp.gas oxygen and the Dns diffusivity. The porosity tes...

The objective is to evaluate the potential of the thermal insulation application of sisal fibre in the form of a nonwoven material. The thermo -physical and microstructural characteristics of sisal/nonwoven wool were determined experimentally. Also, the tensile strength of sisal/nonwoven wool was systematically evaluated. The thermal conductivity c...

Two series of phosphate glasses belonging to the (65-x) P2O5–35CaO–xRE2O3 system (RE = Eu or Tb; 0 ≤ x ≤ 6 mol%) were prepared by the melt-quenching technique. All compositions were successfully drawn as continuous monofilaments fibers. The effect of Eu3+ and Tb3+ ions concentration on their mechanical, structural, and photoluminescence properties...

Advanced Ceramics possess various unique properties and are gifted to withstand harsh environments. The aim of this book is to cover various aspects of the advanced ceramics like carbides, nitrides and oxides for energy and environment related applications. Advanced ceramics with additional functionality propose significant potential for greater im...

In order to study the effect of polypropylene fibers on the durability of cementitious composites, several experimental tests have been carried out in the laboratory. The composite was tested with different volume fractions of polypropylene fibers (0.05%, 0.10%, 0.30% and 0.50%). All the results relating to the indicators (porosity accessible to wa...

Biocomposites based on thermoplastic polymers and natural fibers have recently been used in wind turbine blades, to replace non-biodegradable materials. In addition, carbon nanofillers, including carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs), are being implemented to enhance the mechanical performance of composites. In this work, the Mo...

Background: Stipa tenacissima L. (S. tenacissima), called Esparto grass, is a cultivated species used for industrial purposes, including textile production. This species has never been studied for its medical potential before, nor has it been used in traditional medicines. It is thus fitting that the present study aimed to investigate the pharmaco...

There has been lately a phenomenal rise in the use of natural dyes in different areas, although the principal problem with these natural dyes is their high cost for the production. The main idea of this study is to convert the waste of saffron flower to an eco-friendly natural colorant for sustainable textile coloration of wool fabric. This work st...

The 3D printing technology used for small tidal and wind turbines has great potential to change and overcome certain weaknesses in traditional manufacturing techniques. In rural areas and isolated communities, small turbine systems could be locally fabricated and assembled by using additive manufacturing machines and also can be employed to decreas...

In this work, a sensor yarn based on a natural sisal yarn containing a non-electro-conductive core impregnated with PVA polymer and coated by PEDOT:PSS polymer as an electro-conductive sheath was investigated. The main objectives include the development of this new sensor yarn as a first step. Then, we look towards the insertion of this sensor yarn...

Composites reinforced with feather fibers have attracted the attention of scientists due to their low cost, availability, renewable character and low density. This experimental study emphasizes the effect of molding techniques on the mechanical, thermal and biodegradability properties of feathers nonwoven reinforced polyester composite (FP). The co...

Despite the variability of Moroccan natural resources, few Moroccan natural fibers are exploited as natural textile composites. This study aims to investigate the characteristics of 3D warp interlock fabrics based on Moroccan sisal yarns. Before weaving, the characteristics of sisal yarns have been analyzed following standards. Based on these natur...

The adoption of sustainable behaviors in terms of reducing energy consumption and greenhouse gas emissions leads us to search for green, biodegradable, renewable and abundantly available materials. Chicken feather waste is an abundant by-product and its valuation offers a potential solution to these problems. The aim of this work is to improve ener...

This study aimed to investigate the possibility of including aerosils in plaster to develop a highly insulating product. Several plaster samples were prepared by adding different Aerosil percentages (5%, 10%, and 15%). Composite materials were characterized experimentally. The thermo-physical and microstructural characteristics of these samples wer...

In order to study the phenomena of crack growth in reinforced concrete with polypropylene fibers and sisal fibers, several experimental tests have been implemented. The compression and flexural tensile tests have been performed on standard prismatic specimens notched laterally. Studies of the mechanical behavior of gravel concrete mixed with polypr...

The aim of the current study is to further investigate the impact of the sisal fiber content up to 30% on the mechanical and thermal properties of polylactic acid (PLA) matrix composites following up to our previous study for sisal content up to 15%. The biocomposites were prepared successfully using a twin‐screw extruder and an injection molding m...