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Leila Anis Ghannam

Full professor
Chemistry - Biochemistry department - Section I - Hadath
Speciality: Physical chemistry- Surfaces and interfaces, Polymers
Specific Speciality: كيمياء فيزيائية

Education
2003 - 2006: PhD-Doctorat

Ecole des Mines d`ALES et l'UNIVERSITE de Pau et des Pays de l`Adour
Chimie Physique-POLYMERE

TRES Honorable

2001 - 2002: MASTER 2 (DEA)

UNIVERSITE DE HAUTE ALSACE-FRANCE
CHEMISTRY of SURFACES and INTERFACES

GOOD

1997 - 2000: MASTER 1

LEBANESE UNIVERSITY-FACULTY OF SCIENCES-I
CHEMISTRY

GOOD

Conferences 26 participations
(O.P) Sanaa SHEHAYEB, Xavier DESCHANELS, Iyad KARAME, Leila GHANNAM, Guillaume TOQUER, Photothermal Solar Receptors Obtained by Electrophoretic Deposition of Nanoparticles having Optical Selective Properties on Conductive Substrate, European Materials Research Society (E-MRS), Lille - France

Convention (meeting)
2016-05-02 to 2016-05-06

(O.P) Sanaa SHEHAYEB, Xavier DESCHANELS, Iyad KARAME, Leila GHANNAM, Guillaume TOQUER, “Photothermal Solar Receptors Obtained by Electrophoretic Deposition of Nanoparticles having Optical Selective Properties on Conductive Substrate”, European Materials Research Society (E-MRS), Spring meeting , Lille, France

Convention (meeting)
2016-05-02 to 2016-05-06

(O.P) Rayane AKOUMEH, Alice BEJJANI, Tamara El ZEIN, Leïla GHANNAM, Laurent BILLON and Bilal NSOULI, “Time-of-Flight Secondary Ion Mass Spectrometry Analysis of Polymer Honeycomb Hierarchical Structure”, 22d International Scientific Conference of LAAS, USEK Lebanon.

Conference
2016-04-14 to 2016-04-15

(Poster) H. SFEIR, L. GHANNAM and L. BILLON, “Synthesis of hybrid silica Nanoparticles through Nitroxide Mediated Miniemulsion Polymerisation”. 2Ème Journées de l`EDST- Université Libanaise- Beyrouth, Décembre 2010

Seminar
2010-12-12 to 2010-12-12

(Oral presentation) Leila GHANNAM, Hélène GARAY and Laurent BILLON `` New Polymeric Materials with Interferential Optical Properties`` au congrès `` Materials & Sensations 2008`` qui a eu lieu à Pau Octobre 22-24, 2008 - Pau, France

Congress
2008-10-22 to 2008-10-24

(Oral presentation) Leila GHANNAM and Laurent BILLON, “New polymeric materials with interferential optical properties”. Sixième Colloque Franco-Libanais sur la Science des Matériaux (CSM6), Beyrouth – Liban, 15-17 mai 2008

Colloquium
2008-05-15 to 2008-05-17

(Oral presentation) Maggy MANGUIAN, Leila GHANNAM, L. BILLON, “A facile route to ionomer macromolecular design for honeycomb-like structures”. IUPAC International Symposium on Ionic Polymerization 2007 (IP `07), Bayreuth, Germany, 2-7 septembre 2007

Symposium
2007-09-02 to 2007-09-07

(Oral presentation) Laurent BILLON, Leila GHANNAM and J. FRANÇOIS, “Facile route to elaborate honeycomb structures”. American Chemical Society Fall National Meeting & Exposition, San Francisco USA, 10-14 septembre 2006

Congress
2006-09-10 to 2006-09-14

(Oral presentation) Leila GHANNAM, J. FRANÇOIS and Laurent BILLON, “Facile route to elaborate honeycomb structures”. 1st European Chemistry Congress Budapest, Hungray, 27-31 août 2006

Congress
2006-08-27 to 2006-08-31

(Oral presentation) Leila GHANNAM, J. FRANÇOIS and Laurent BILLON, “Pigments colorés à base de mica ”. Cinquième Colloque Franco-Libanais sur la Science des Matériaux (CSM5), Beyrouth – Liban, 17-19 mai 2006

Colloquium
2006-05-17 to 2006-05-19

(Oral presentation) Leila GHANNAM, Hélène GARAY, Martin E.R. SHANAHAN, J. FRANÇOIS et Laurent BILLON, “Nouveaux pigments hybrides inorganique/organiques colorés”. 35ème colloque annuel du GFP, Paris-France

Conference
2005-11-22 to 2005-11-24

(Poster session) L. GHANNAM, L. BILLON, J. FRANÇOIS, M.E.R. SHANAHAN and H. GARAY, “Goniospectrophotometry: Characterization of Visual Aspect of Materials”. 12th International Metrology Congress, Lyon-France

Congress
2005-06-20 to 2005-06-23

(Oral presentation) Leila GHANNAM, Hélène GARAY, Martin E.R. SHANAHAN, J. FRANÇOIS and Laurent BILLON, “Matériaux inorganique/organique colorés à base de mica”. Journées du GFP Sud Ouest, Saint Lary, Hôtel Pons le Dahu-France

Conference
2005-01-27 to 2005-01-28

(Oral presentation) Leïla GHANNAM, Laurent BILLON, Jeanne FRANÇOIS, Martin E.R. SHANAHAN, Marie BACOU and Hélène GARAY, “Colour Measurements for Interference pigments by Goniospectrophotometry ”. 1st International Workshop on Materials and Sensations, MS 2004, Pau-France

Congress
2004-10-27 to 2004-10-29

(Oral presentation) Jeanne FRANÇOIS, Leïla GHANNAM, Khaled Karaky and Laurent BILLON, “New Polymer Materials For New Psycho-Sensorial Properties?” 1st International Workshop on Materials and Sensations, MS 2004, Pau-France

Congress
2004-10-27 to 2004-10-29

(Oral presentation) Leïla GHANNAM et Marie BACOU, (invitée), “Le Cadmium dans l’industrie pigmentaire” Journée technique : « les métaux dans l’environnement », Technopôle Hélioparc- Pau-France

Plenary session
2004-09-30 to 2004-09-30

(Poster session) Leïla GHANNAM, Marie BACOU, Hélène GARAY, Jeanne FRANÇOIS, MartinE.R. SHANAHAN and Laurent BILLON, “Synthesis of Hybrid Polymeric Materials: Preparation of Diblock Copolymer-Mica Coloured Composites”. 40ème Symposium International sur les Macromolécules, WORLD POLYMER CONGRESS MACRO 2004, Paris-France

Symposium
2004-07-04 to 2004-07-09

(Oral presentation) Leïla GHANNAM, Marie BACOU, Hélène GARAY, Jeanne FRANÇOIS, Martin E.R. SHANAHAN and Laurent BILLON, “Poly(n- butyl acrylate) Grafted on Mica Surface by in situ Nitroxide-Mediated Polymerisation”. Quatrième Colloque Franco-Libanais sur la Science des Matériaux (CSM4), Beyrouth – Liban

Congress
2004-05-26 to 2004-05-28

(Poster session) Leïla GHANNAM, Marie BACOU, Hélène GARAY, Jeanne FRANÇOIS, Martin E.R. SHANAHAN and Laurent BILLON, “Synthesis of Hybrid Polymeric Materials: Preparation of Poly(n-butyl acrylate-block-(Styrene-Alizarine)) Diblock Copolymer-Mica Coloured Composites ”. Quatrième Colloque Franco-Libanais sur la Science des Matériaux (CSM4), Beyrouth – Liban

Colloquium
2004-05-26 to 2004-05-28

(Oral presentation) L. GHANNAM, H. GARAY, M. BACOU, J. FRANÇOIS, M.E.R. SHANAHAN et L. BILLON, “Nouvelle approche de synthèse de pigments organo-minéraux innovants en terme d’aspect visuel ”. Ecole thématique interdisciplinaire sur la couleur des matériaux : « les oxydes et composés métalliques », Roussillon-Vaucluse-France

Summer School
2004-03-22 to 2004-03-26

(Poster session) Leïla GHANNAM, Laurent BILLON, Marie BACOU, Hélène GARAY et J. FRANÇOIS, “Synthèse de matériaux hybride inorganique/organiques : greffage de poly (acrylate de n-butyle) à la surface du mica ”. 13ème Rencontre Chimie Grand Sud Ouest, SFC-Aquitaine, Pau- Université de Pau et de Pays de l’Adour

Convention (meeting)
2003-11-28 to 2003-11-28

(Poster session) L. GHANNAM, L. BILLON, H. GARAY, M. BACOU et J. FRANÇOIS, “Mise au point et formulation de pigments organo-minéraux innovants en terme d’aspect visuel ”. 7èmes ENTRETIENS PHYSIQUE – INDUSTRIE, " LA COULEUR : Origines, Perception et Implications ", Paris Expo - Porte de Versailles

Convention (meeting)
2003-10-22 to 2003-10-22

(Poster session) M. FEUILLADE, L. GHANNAM, C. CARRE (Morlet-Savary), “Microstructuration photoinduite de polymères : caractérisation par AFM ”. Symposium SIGMA-ALDRICH Jeunes Chimistes, Obernai

Symposium
2002-10-21 to 2002-10-23

(Poster session) L. GHANNAM, C. CARRE (Morlet-Savary), “Matériaux photopolymérisables microstructurables : caractérisation par enregistrement de réseaux ”. Colloque 2002 du GDR "Matériaux et Fonctions de l'Optique Non Linéaire" - L’Aber-Vrac'h (Brest)-France

Congress
2002-10-02 to 2002-10-04

(Oral presentation) C. CARRE (Morlet-Savary), L. GHANNAM, F. GILLOT, L. MAGER, A. FORT, “Micro et nano-structuration par la lumière de matrices polymères hôtes”. Colloque GDR COMES (Commutation Moléculaire à l'Etat Solide), GIF-sur-Yvette

Convention (meeting)
2002-05-13 to 2002-05-14

(Oral presentation) C. ECOFFET, R. BACHELOT, C. TRIGER, L. GHANNAM, “Photopolymerization by optical near field ; materiel and methods”16. Joint Meeting of the European Societies of Physical Chemistry, VENISE (Italy)

Convention (meeting)
2001-10-03 to 2001-10-06

Publications 17 publications
S. Shehayeb, X. Deschanels, I. Karamé, L. Ghannam, G. Toquer Spectrally selective coatings obtained from electrophoretic deposition of CuO nanoparticles Surface and Coatings Technology Elsevier 2017

Cathodic electrophoretic deposition (EPD) of CuO nanoparticles is investigated for the formation of CuO tandem photothermal absorber starting from CuO-isopropanol suspension. Prior to the deposition step, the stabilization of the suspension in request is achieved via the addition of Mg(NO3)2 acting as a stabilizer but, also as a binder for the final coating. The colloidal dispersion stability is studied as a function of the concentration of Mg(NO3)2 added to the suspension by dynamic light scattering coupled with laser doppler velocimetry in order to determine the size and the charge of particles respectively. EPD parameters, such as the electric field and deposition time, have been investigated in order to control the thickness and the morphology in order to select the most promising coatings. The evolution of the thickness, obtained from scanning electron microscopy images, as a function of deposition time for different applied electric field is in agreement with a linear Hamaker law type. This is also used here as a first attempt to extract the effective density of the coating. Finally, the conversion efficiency of the tandem material is calculated from the reflectance spectra of the UV–vis-NIR and the Fourier transform InfraRed spectroscopy in order to link the EPD parameters to the spectral selectivity. The optimal coating was formed with an applied electric field of 50 V·cm− 1 for a deposition time of 30 min yield the highest efficiency at 0.8.

M. Wehbie, G. Arrachart, I. Karamé, L. Ghannam, S. Pellet-Rostaing An ionic liquid-based extraction system using diglycolamide functionalized macrocyclic platforms for the extraction and recovery of lanthanides Dalton Transactions (Royal Society of Chemistry) 2017

Solvent extraction of lanthanides Ln(III) (La, Eu and Yb) with resorcin[4]arene cavitand-triazole-DODGA (CR4-TZ-DODGA) and t-butylcalix[4]arene-triazole-DODGA (C4-TZ-DODGA) has been studied in a room temperature ionic liquid (RTIL), N-octyl-N-ethylpiperidinium bis(trifluoromethylsulfonyl)imide ([EOPip]NTf2). The two macrocyclic platforms were functionalized with four diglycolamide (DGA) moieties thanks to a click reaction and fully characterized by NMR and MS analysis. The effects of acidity as well as the concentration of the ligands were investigated on the extraction and separation properties. The parameters of the extraction processes were determined by the slope method and thermodynamic studies. For both ligands, the extraction efficiency changes along the lanthanoid series with selectivity toward Yb(III) in regard to La(III) and Eu(III). The selective extraction and recovery of lanthanides from a simulated leaching solution of a Nd/Fe/B/Dy magnet has also been investigated. Graphical abstract: An ionic liquid-based extraction system using diglycolamide functionalized macrocyclic platforms for the extraction and recovery of lanthanides

M. Wehbie, Arrachart, C. Arrambide Cruz, I. Karamé, L. Ghannam, S. Pellet-Rostaing Organization of diglycolamides on resorcinarene cavitand and its effect on the selective extraction and separation of HREEs Separation and Purification Technology (Elsevier) 2017

Two calix(4)resorcinarene based cavitands, one that contains four triazole units, calix(4)resorcinarene-tetra(hexyltriazole) CR4-Tz LI, and another that contains four triazole diglycolamide units, calix(4)resorcinarene-tetra(didecyldiglycolamidetriazole) CR4-Tz-DDDGA LII, were synthesized and fully characterized by IR, NMR, and MS. The efficiency of the two cavitands were compared toward the extraction of 7 lanthanides (Ce(III), Nd(III), Sm(III), Gd(III), Dy(III), Er(III), Yb(III)) in chloroform from 5 M HNO3. The extraction study showed that LI, which contains only the triazole units, is unable to extract any of the targeted metals. The effects of the organization and diluents on the distribution coefficients and the selectivity of LII were also studied toward the same lanthanide series at the same acidity. The obtained results showed that the cavitand is selective toward heavy lanthanides irrespective of the diluents. The extraction and stripping experiments of the 7 Ln(III) and the separation of Nd and Dy from a Fe-B-Nd-Dy leaching solution were performed.

M. WEHBIE, G. ARRACHART, I. KARAME, L. GHANNAM, and S. Pellet-ROSTAING Triazole Diglycolamide Cavitand for Lanthanide Extraction RSC 2016

Click chemistry, which relies on the efficiency of the copper (I)-catalyzed azide-alkyne cycloaddition, was used to link four diglycolamide (DGA) moieties to a resorcinarene platform leading to a specific tetra-DGA-resorcinarene ligand (c-methylcalix(4)methylresorcinarene-4-triazole-dioctyldiglycolamide denoted CR4-Tz-DODGA). The extraction ability of this ligand was studied in a mixture of toluene / iso-octanol (90/10, v/v) toward rare earth elements (REE) at different nitric acid concentrations, ranging from 1 to 5 M. The results show the efficient extractability of and selectivity towards heavy REEs. The stoichiometry of the extraction was established by the slope analysis method and an extraction mechanism was proposed based on estimates of the thermodynamic parameters. From the extraction behavior of the tetra-DGA-resorcinarene ligand, we present the possibility for the extraction and separation of dysprosium from used permanent magnets.

Moheddine Wehbie, Guilhem Arrachart, Iyad Karamé, Leila Ghannam and Stéphane Pellet-Rostaing Diglycolamide-functionalized resorcinarene for rare earths extraction Elsevier 2016

A C-methylcalix(4)methylresorcinarene–DODGA ligand, derived from calix[4]methylresorcinarene functionalized with four diglycolamide (DGA) binding units, was synthesized and characterized by NMR and MS. The ligand was investigated with respect to the extraction of rare earth elements (REEs) from nitric acid solution. High sensitivity was observed, particularly toward heavy rare earth elements. The acidity effects, as well as the concentration of the extractant, were evaluated with regard to the extraction and separation efficiencies. The results showed that the distribution coefficient values increase with an increase in nitric acid concentration in the range from 0.1 to 5 mol L−1. A slope analysis method and spectrophotometric titrations showed clear complexation of the REEs with the ligand. An extraction mechanism is proposed from the estimation of the thermodynamic parameters (ΔH, ΔS, and ΔG). The extraction and stripping of REEs from a simulated leaching solution of a Nd/Fe/B/Dy magnet have been studied.

Mohamad ABD EL RAHIM, Leïla GHANNAM, Rodolfe ANTOINE, Philippe DUGOURD, Driss RAYANE, Michel BROYER and Iyad KARAMÉ Structure and Permanent Electric Dipole of para-Fluoroaniline in Gaseous Phase Springer 2013

By coupling a matrix assisted laser desorption source to an electric beam deflection setup, we have measured the permanent electric dipole moment of the isolated para-fluroaniline PFAN (FC6H4NH2) molecule in the ground state. This measurement of the electric dipole of an isolated push-pull molecule is unique. The experimental value is compared to two different calculations and the structure of the system is discussed

Joumana TOUFAILY, Bachar KOUBAISSY, Lina KAFROUNY, Hussein HAMAD, Patrick MAGNOUX, Leïla GHANNAM, Ali KAROUT, Hassan HAZIMEH, Ghinwa NEMRA, Moustafa HAMIEH, Nawal AJOUZ, Tayssir HAMIEH Functionalization of SBA-15 Materials for the Adsorption of Phenols, from Aqueous Solution Springer 2013

Water pollution by toxic organic compounds is a problem and demand for efficient adsorbents for the removal of toxic compounds is increasing. In the present work, we studied the functionalization of SBA-15 materials via the co-condensation between an alkoxysilane and an organoalkoxysilane in the presence of P123 as structuring agent. Several types of ligands were used: 3-mercaptopropylmethyldimethoxysilane, N-[3-(trimethoxysilyl) propyl] aniline; aminopropyltrimethoxysilane; [aminoethylamino]-propyltrimethoxysilanes and [(2-aminoethylamino) ethylamino] propyltrimethoxysilanes. These materials exhibit BET surface area of 275–776 m2/g and total pore volume of 0.29–1 cm3/g, depending on the ligand types and contents. Elementary analysis results confirm the incorporation of both thiol and amine group in the materials. Batch adsorption studies shows that the adsorption capacity of phenol drifts on the amine and thiol functionalized SBA-15 is greater than that on pure SBA-15. A linear relationship was observed between the adsorption capacity and N/SiO2 ratio. It was shown that the presence of amine promotes interactions with water molecules, on the other hand, these results can also be explained by the basic behavior of N-functionalized materials.

Leïla GHANNAM and Laurent BILLON Polystyrene-coated Microsized Particles by "in situ" Surface Initiated Polymerization in accord to Langmuir Model Elsevier 2012

This study describes the mechanism of adsorption of polystyrene chains PS "in situ" growth from micro-sized commercial silicate particles, i.e. Feldspar. The main aim is to derive adsorption isotherms from thermal gravimetric analysis (TGA) and size exclusion chromatography (SEC) data obtained during the direct polymerization of PS initiated by a pre-adsorbed radical initiator onto the inorganic surface. The adsorption isotherm plot indicates that the PS adsorption is in accord with the Langmuir Model. The amount of PS monolayer coverage increases with polymerization time, and it is highly dependent on the monomer diffusion to the surface during the hybrid inorganic/organic synthesis. Such behavior depends on the concentration gradient between monomer concentration in solution and that adsorbed by polymerization onto the micro-sized particles surface of Feldspar.

Laurent Billon, Hélène GARAY, Leïla Ghannam Novel amphiphilic copolymers containing a dye group, preparation method thereof and use of same as pigments PATENT 2010

Novel amphiphilic copolymers containing a dye group, preparation method thereof and use of same as pigments

Laurent Billon, Hélène GARAY, Leila Ghannam Nouveaux copolymères amphiphiles comprenant un groupe colorant, leur procédé de préparation et leurs utilisations comme pigments International Patent 2010

La présente invention concerne de nouveaux copolymères amphiphiles comprenant au moins un groupe colorant, leur procédé de préparation, les milieux dispersés les contenant, ainsi que les pigments comprenant lesdits copolymères adsorbés sur un substrat, et les utilisations desdits pigments.

Leïla GHANNAM, Hélène GARAY and Laurent BILLON Sensitive Colored Hybrid Inorganic/Organic Pigments Based on Polymer-Coated Microsized Particles ACSPublications 2008

We present herein the preparation of colored hybrid organic/inorganic pigments: poly(styrene-co-alizarin)/mica. We have used direct nitroxide-mediated radical polymerization of styrene and modified alizarin from mica-bound bicationic azo compounds as initiator. The color of the P(S-co-A)−mica composites is related both to the adsorption density of polymers on mica surface and to the length of the macromolecular chains. The longer the polymerization time is, the more the chains are crushed onto the mica surface and the nearer the dye is to the surface. Consequently, the dye will be strongly influenced by the oxanions of the surface leading to color variation. This variation has been attributed to the superimposition of different adsorption of the alizarin due to different states: when closer to the surface, alizarin is more influenced by oxanions and its color tends to pink, when farther away from the surface, the alizarin electronic state is less changed and its color tends to yellow. Finally, the global color is due to the mix of the different electronic states leading to orange pigments. This behavior could be represented as a “gradient” of alizarin position from the mica surface to the air/polymer interfaces. Depending on the synthesis methodology, the color of such pigments can be easily tuned not only by adjustment of the length and the grafting density but also by the number of dyes in the chains.

Leïla Ghannam, Maggy Manguian, Jeanne Franc¸ois and Laurent Billon A versatile route to functional biomimetic coatings: ionomers for Royal Society of Chemistry 2007

Highly ordered films were prepared by spreading out carbon disulfide (CS2) solutions of ionomers over inorganic surfaces and for the first time over an organic surface. These ionomers, i.e. hydrophobic homopolymers or copolymers end-capped by a cationic group, were easily synthesized in a one-step reaction by a control radical process called nitroxide-mediated polymerization. Optical and electronic microscopy observations of the films lead to the definition of new criteria for the formation of such structures. Firstly, the effect of a solid support on the honeycomb structure regularity was studied. By comparing two polar substrates, it was found that a more regular organization is obtained over mica than over glass. This phenomenon may be due to the electrostatic interactions between cationic ionomer ends and oxanions of the mica surface. Moreover, for the first time, highly ordered hexagonal patterns were also created on a flexible and soft polymeric surface, a poly(vinyl chloride) sheet. Secondly, it was found that the characteristics of the polymeric chain of the ionomer and mainly its glass transition temperature play an important role in the process of formation of ordered structures. The iridescent aspect of the films, due to light diffraction and optical interferences, was studied and quantified by spectrogoniometry. Finally, results of measurements of superficial tension are discussed; the presence of a honeycomb film at the surface of a material very significantly enhances its hydrophobicity. All these criteria of highly ordered structures correlated to a water repellency and iridescent behaviours lead to a functional biomimetic material.

Leila Ghannam, Helene Garay, Jeanne Franc¸ois, Laurent Billon New Polymeric Materials with Interferential Optical Properties Wiley 2007

Nature provides a wide pallet of colors but also a wide number of fascinating optical phenomena such as nacre or interferential effects, which can be observed in insect wings and shellfish. The origin of such effects is attributed to the presence of highly ordered arrangements in Nature’s materials. The aim of this paper is to focus some new approaches and advances for creating interferential optical phenomena as observed in nature by tuning or modeling the polymer architectures or organization. A relatively simple method is described to prepare organic/inorganic hybrid pigments constituted of mica platelets and adsorbed polymer layers. It is shown that the color of mica is changed upon polymer adsorption, and when one of the copolymer sequences includes a dye, its color is influenced by the chemical properties of the mica surface. Moreover, a new facile route is presented to obtain highly ordered surfaces using ionomer macromolecular designs synthesized in one step by controlled radical polymerization. The preparation of films with very regular pore size and spatial organization is successfully realized by using ionomer solutions. An original property of these films with an iridescent color obtained by light diffraction as a result of the optical interferences of sunlight with the periodic honeycomb structures is presented. All these new materials based on polymeric controlled structures can reproduce nature by creating an optical interferential and iridescent material, which offers new fascinating applications as original bio-mimetic materials on inorganic surfaces.

Leila GHANNAM, Jeanne FRANÇOIS and Laurent BILLON A facile route to honeycomb like structures ACS 2006

Leïla GHANNAM, Julien PARVOLE, Gael LARUELLE, Jeanne FRANÇOIS and Laurent BILLON Surface-initiated nitroxide-mediated polymerization: a tool for hybrid inorganic/organic nanocomposites ‘in situ’ synthesis Wiley 2006

Hybrid silica particles comprised of an inorganic core and an organic polymer shell can be synthesized by surface-initiated nitroxide-mediated polymerization (SINMP) in the presence of a grafted alkoxyamine as initiator. The layer of initiator molecules attached or adsorbed to the particles surface is based on a nitroxide group. The synthesis and characterization of these alkoxyamine structures are briefly described. The grafted initiator particles are studied in order to determine the nature of the anchorage sites and the grafting density. With a stable radical or nitroxide as chain-growth moderator tethered to the inorganic core, it was demonstrated that the grafting from or to SINMP exhibits a control character with a very low polydispersity and good agreement between theoretical/experimental molecular weights. A comparative review of different alkoxyamines with a bimolecular system based on a grafted azoic initiator i n the presence of an acyclic β-phosphonylated nitroxide called SG1 is also described. Moreover, original methods for the synthesis of alkoxyamine grafted surface by in situ trapping of carbon radicals and some new developments for colored pigments will be reported. These topics could be one of the directions of the field in the next years

Leïla GHANNAM, Hélène GARAY, Martin E.R. SHANAHAN, Jeanne FRANÇOIS and Laurent BILLON A New Pigment Type: Colored Diblock Copolymer-Mica Composites ACSPublications 2005

Elaboration of multilayered colored inorganic/organic composite by block copolymerization from the mica surface was studied for the first time. The mica color is changed from white to yellow upon PBA polymer adsorption and to pink upon poly(BA-b-(S−dye)) copolymerization, influenced by the mica surface chemical properties.

Leïla GHANNAM, Marie BACOU, Hélène GARAY, Martin E.R. SHANAHAN, Jeanne FRANÇOIS and Laurent BILLON Elastomer monolayers adsorbed on mica surfaces by nitroxide-mediated polymerisation Elsevier 2004

We reported the first synthesis of Poly(n-butyl acrylate) by in situ nitroxide-mediated polymerisation from the surface of mica while preserving its lamellar structure. To obtain this polymer adsorbed to mica surface, a free radical initiator 2,2′-azobis(isobutyramidine hydrochloride) (AIBA) was attached by ion exchange to the surface of mica, and the resulting was used as a initiator to polymerise butyl acrylate. The kinetic studies show that the initiator adsorbed to mica surface successfully initiated the radical polymerisation of butyl acrylate. Adsorbed polymer was indeed obtained, in different amounts depending on reaction time, the XRD patterns of resulting products indicate that the polymer chains did not intercalate the aluminosilicate layers, as expected

Supervision 10 Supervised Students
Preparation of polymeric materials used as sensors for pollutants

Hoda Mohammad Dbouk
Master M2 Thesis: Physical Chemistry, Materials and Catalysis in 2016

Behavior of Particles - Clusters of Particles on the Interface Rock Surface/ Air in Presence of Liquids

Tamara Ghanem Braish
Master M2 Thesis: Physical Chemistry, Materials and Catalysis in 2016

Elaboration of inorganic/organic hybrid silica nanoparticles through Nitroxide Mediated Polymerisation miniemulsion

Huda Sfeir- M2R
Février- juillet 2010 : encadrement de la stagiaire ``Mlle Huda Sfeir`` en stage M2R option Chimie-Physique. Le sujet est intitulé : « Elaboration of inorganic/organic hybrid silica nanoparticles through Nitroxide Mediated Polymerisation miniemulsion ». Ce stage s'est effectué entre le laboratoire MCEMA de l`UL et Equipe Physique et Chimie des Polymères (EPCP) de l'Université de Pau et des Pays de l`Adour- UPPA).

Elaboration des structures organisées à base de résorcinol destinées à des applications environnementales

Mohamad Mattar-M1R
011 : encadrement de l`étudiant ``Mohamad Matar`` en stage M1. Le sujet est intitulé : « Elaboration des structures organisées à base de résorcinol destinées à des applications environnementales ». Ce stage s`est effectué entre le laboratoire MCEMA et le laboratoire de Chimie organométallique de Catalyse et de Coordination.

Macromolecular engineering to design latex particles by miniemulsion polymerization

Huda Sfeir-PhD
Décembre 2012 – Mars 2014: encadrement d`une Thésarde “ Mlle Huda SFEIR”. Cette thèse s`intitulé : “Ingénierie macromoléculaire pour la synthèse de particules de latex par polymérisation en miniémulsion”. Cette thèse, financée par le CNRS - Franḉais pour les pays en cours de développement, s`est effectué au laboratoire EPCP (UPPA) sous la direction du Pr. Laurent BILLON et Dr. Maud SAVE et était soutenue le 5 mars 2014.

During the work of this PhD, we investigated the synthesis of latex particles by miniemulsion, an aqueous dispersed medium process. We managed to synthesize in a controlled manner high molar mass (Mn > 30 000 g.mol-1) polystyrene latex particles via nitroxide mediated radical polymerization (NMP) in miniemulsion in both the presence and absence of molecular surfactant. Stable latex with final diameters within the range of 150-200 nm were synthesized. A second part of the PhD work was devoted to the transposition of surface-initiated NMP from bulk polymerization to polymerization in aqueous dispersed media (miniemulsion) in order to synthesize silica@polystyrene core@shell hybrid nanoparticles. The last part of the PhD work was dedicated to the synthesis of polymeric stabilizers, more precisely to the synthesis of amphiphilic copolymers based on dextran or poly(acrylic acid) polymers hydrophobically modified by terpenes. The stabilization efficiency of such copolymers synthesized from renewable resources to stabilize styrene miniemulsion polymerization was investigated. During this work, we characterized the macromolecular features of polymers along with the size and the morphology of the final particles by respectively size exclusion chromatography (SEC), dynamic light scattering (DLS) and microscopy (SEM, TEM, AFM).

Synthèse de nanoparticules hybrides core@shell par une approche soucieuse de l’environnement

Mariame KANSO- M2R
Printemps 2013: encadrement de Mlle. Mariame KANSO du M2R environnement de la Faculté d`agronomie. Ce stage intitulé: “Synthèse de nanoparticules hybrides core@shell par une approche soucieuse de l’environnement” s`est effectué au laboratoire EPCP (UPPA)

Modifications chimiques de polymères naturels par Chimie Verte

Mahmoud ABDEL HAMID- M2R
Printemps 2013: M. Mahmoud ABDEL HAMID du M2R organique. Ce stage intitulé: “Modifications chimiques de polymères naturels par Chimie Verte” s`est effectué entre les laboratoires EPCP (UPPA) et LCOCC (UL)

Etude de l’évolution des émissions de COV et odeurs de matériaux polymères vierges ou biosourcés lors des processus de recyclage

Mlle Waed AHMAD- M2 professionel
Printemps 2013- Mlle Waed AHMAD du M2 professionel: Instrumentations et stratégies d`analyses. Ce stage intitulé: “Etude de l’évolution des émissions de COV et odeurs de matériaux polymères vierges ou biosourcés lors des processus de recyclage.” s`est effectué entre les laboratoires LACO (Université Libanaise) et C2MA (Ecole des Mines d`Alès)

Elaboration des films en nids d`abeilles pour extraction des métaux lourds et toxiques

Rayane AKKOUMEH- PhD
Octobre 2013- présent: encadrement d`une Thésarde “ Mlle Rayane AKKOUMEH”. Cette thèse s`intitule : “Elaboration des films en nids d`abeilles pour extraction des métaux lourds et toxiques”, et s`effectue entre le laboratoire Equipe Physique et Chimie des Polymeres (EPCP) de l'Université de Pau et des Pays de l`Adour- UPPA) sous la direction du Pr. Laurent BILLON et le laboratoire de la Commité Libanaise d`Emission Atomique (CLEA) sous la direction du Pr. Bilal NSOULI. Cette thèse est financée par le CNRS -Libanais

Methodology for the Synthesis of Macrocyclic Chelating System for the Treatment of Contaminated Effluents

Moheddine Wehbie- PhD
Octobre 2013- présent: co-encadrement avec Pr. Iyad Karamé d`un Thésard “ M. Moheddine Wehbie”. Cette thèse s`intitule : “Methodology for the Synthesis of Macrocyclic Chelating System for the Treatment of Contaminated Effluents”, et s'effectue entre le Laboratoire de Catalyse Organometallique et Chimie de Coordination (LCOCC) de l'Université Libanaise et l'Institut de Chimie Séparative de Marcoule, ICSM, Montpellier France sous la direction du Pr. Stéphane Pellet Rostaing. Cette thèse est financée par le CNRS -Libanais. L'Université Libanaise et le CEDRE.

Languages
Arabic

Native or bilingual proficiency

English

Full professional proficiency

French

Full professional proficiency