Fabienne Poncin-Epaillard

Université du Maine, Le Mans, Pays de la Loire, France

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Publications (120)230.08 Total impact

  • P. Glaris, J. F. Coulon, M. Dorget, F. Poncin-Epaillard
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    ABSTRACT: Driving forces, responsible for the migration of a fluorinated additive added to a thermoset resin, toward the air/solid interface, were investigated. On this subject, the surface chemistry as characterized by XPS analyses was compared to theoretical models based on the rheological properties of the blend. It appears that the migration of the fluorinated molecules toward the surface cannot be described by a conventional diffusion model. A second model derived from the latter suits better to the experimental data and should be presented as another proof that additional motion forces drive the fluorine molecules migration in curing epoxy resin.
    Composites Part B Engineering 05/2015; 73. DOI:10.1016/j.compositesb.2014.12.020 · 2.60 Impact Factor
  • P. Demianenko, B. Minisni, M. Lamrani, F. Poncin-Epaillard
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    ABSTRACT: Interpenetrating polymer network hydrogels based on fluoro-, siloxane-acrylates and N-vinylpyrrolidone were synthesized using simultaneous photopolymerization technique in presence of poly(ethylene glycol diacrylate) as cross-linker. These hydrogels were characterized by Fourier-transform infrared spectroscopy and by their swelling properties. Evidence of the semi-IPN structure was shown thanks to the selective chemical attack on the cross-linker. Poly(ethylene glycol diacrylate) crosslinks of prepared hydrogels were attacked by concentrated basic solution leading to the hydrolysis of the poly(ethylene glycol diacrylate) molecules and the degradation of the polymer network. The solid residue and the liquid phase after degradation were analyzed by gas chromatography with mass spectrometry analyzer and by FTIR spectroscopy. These analyses gave evidence of the presence of non-crosslinked poly(N-vinylpyrrolidone) chains in the acrylate network. Henceforth, the synthesized hydrogel should be associated to a semi-IPN structure.
    05/2015; 4. DOI:10.1016/j.mtcomm.2015.02.004
  • Patrice Glaris, Jean-François Coulon, Michel Dorget, Fabienne Poncin-Epaillard
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    ABSTRACT: Two routes for the grafting of fluorinated molecules to an epoxy resin were studied. The first one deals with the grafting of the liquid-state resin whereas the second one is focused on the grafting onto the solid-state resin. These grafting reactions were shown to be similar as studied through FTIR and XPS spectroscopies. However, it appears that the grafting onto the solid-state resin is limited by the curing advancement. N2 plasma-activation was used to solve this drawback and enhanced the grafting yield. This grafting improvement was mainly explained in terms of the surface wetting improvement and the attachment of nitrogen containing groups at the surface of the treated resin.
    Composites Part B Engineering 02/2015; 69:6–12. DOI:10.1016/j.compositesb.2014.09.019 · 2.60 Impact Factor
  • Maria Jesus Perez-Roldan, Dominique Debarnot, Fabienne Poncin-Epaillard
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    ABSTRACT: In this work, highly hydrophilic PET surfaces were obtained by helium and oxygen plasma treatments. Plasma-treated samples were then grafted with PEG, Pluronic F68, Pluronic F108, mixed solutions of Pluronic and surfactant (nonaethylene glycol monodecyl ether, sodium taurodeoxycholate, hexadecyltrimethyl ammonium bromide). Grafted surfaces were characterized by X-ray photoelectron spectroscopy and contact angle measurements. Surface energy calculations showed a high affinity of hexadecyltrimethyl ammonium bromide to O2 plasma-treated surfaces. In relation to this type of surface chemistry, the anti-fouling character of such a modified PET surface was studied by confocal microscopy. Evidence of reduction of the Immunoglobulin G adhesion by around 70%, 60% and 50% for plasma-treated surfaces grafted with PEG, Pluronic F108 and Pluronic F68, respectively is given. A remarkable increase in the anti-fouling properties was also observed on aged grafted surfaces.
    RSC Advances 11/2014; 4(109). DOI:10.1039/C4RA09328C · 3.71 Impact Factor
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    Maria Jesus Perez-Roldan, Dominique Debarnot, Fabienne Poncin-Epaillard
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    ABSTRACT: In this work, poly(ethylene terephthalate) (PET) films were treated by oxygen and helium plasmas and their chemistry and morphology were studied. Samples were characterized by X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), scanning electron microscopy (SEM) and water contact angle (WCA) measurements. The aging of plasma-treated PET films was studied in different media (air and water) by WCA. The anti-fouling properties of the plasma treated surfaces were evaluated by confocal microscopy. Both oxygen and helium plasma-treatments produced hydrophilic and nano-structured surfaces that presented a remarkable reduction of the bioadhesive character. Besides, the grafting of plasma treated surfaces was explored using Pluronic F108 in order to improve the anti-fouling properties of the plasma treated surfaces.
    RSC Advances 07/2014; 4(56):31409. DOI:10.1039/c4ra05691d · 3.71 Impact Factor
  • Patrice Glaris, Jean-François Coulon, Michel Dorget, Fabienne Poncin-Epaillard
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    ABSTRACT: The aim of this work is to decrease the adhesion between a cured modified epoxy-based substrate and an in situ cured virgin epoxy-based piece. The effect of perfluorinated additives on the non-adhesion output is investigated through an adapted pull-off test. It appears that additive migration initiates the surface fluorination. Longer the fluorinated chain is, higher the surface fluorination is and weaker the adhesion strength is. The weak chemical affinity between these two epoxy resins is shown to be mainly responsible for these results leading to an adhesive rupture.
    Composites Part B Engineering 07/2014; 63:94–100. DOI:10.1016/j.compositesb.2014.03.019 · 2.60 Impact Factor
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    ABSTRACT: Immobilization of antibody molecules onto hydrophobic polymeric surfaces with disordered orientation is something unwanted in many applications. To overcome this drawback, controlled immunoglobulin G (IgG) immobilization onto poly(vinylidene fluoride) surface was investigated in this paper. A two-step process involving radiofrequency plasma pretreatment for polymer surface functionalization, followed by coupling reaction was developed, after which immunoglobulin G was immobilized onto the surface directly or via protein-A. IR and XPS data proved that the process is more efficient when the radiofrequency plasma pretreatment was performed using N2 and N2/H2 as discharge gases. NIR-CI, AFM and XPS surface evaluation revealed that immobilization of IgG onto N2/H2 plasma-treated PVDF via grafted protein-A was achieved with an ends-on orientation, leaving available the antigen binding sites of IgG. This procedure could be a promising route for the preparation of oriented IgG assembly onto PVDF, useful in biomedical, membranes or sensors applications. QCM results showed a better antibody–antigen interaction when IgG immobilization onto PVDF substrate is mediated by protein A.
  • Naima Hachache, Youcef Bal, Dominique Debarnot, Fabienne Poncin-Epaillard
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    ABSTRACT: Polypropylene fiber meshes were plasma-treated in order to attach new chemical functions corresponding to acidic or basic groups without altering the roughness of such thin material. An almost complete wettability of these plasma-treated materials is obtained. Because of the plasma-grafting of acid or amino moieties, such surface treatment allows increasing the adsorption rate of quaternary ammonium molecule like Aliquat 336. This increase was explained by specific interactions of ammonium head of the Aliquat 336 and hydrophilic group of plasma-treated PP, followed by the adsorption of a further layer of Aliquat 336 through hydrophobic interactions of its hydrocarbon chain. These interactions between the carrier and the polymeric surface were characterized leading to physisorption mechanism. Such new material could be applied to the extraction process since no evidence of aging was given.
    02/2014; 35:386-91. DOI:10.1016/j.msec.2013.11.025
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    ABSTRACT: The biocontamination is one of the major problems in various industrial sectors, specifically in medicine and environment fields. It has been shown that surface characteristics of materials, such as superhydrophobic character, can allow obtaining " antibioadhesive " surfaces. Indeed, the wetting is reduced which may favor the "sliding" of the aqueous medium on the surface. Hence, its ability to interact with bacteria may also be reduced. This phenomenon is associated with the chemical functionality of the coating and its nano-roughness, in order to not mechanically trap the bacteria. Here, such anti-bioadhesive surfaces are designed from polyethylene terephtalate (PET) by three steps plasma-treatment. First, the nano-roughness is created by oxygen plasma-treatment with controlled dimensions. Then, the plasma-treated polymeric surface was hydrophobized with a tetrafluorocarbon plasma, allowing to obtain a water contact angle of 145 ± 4 °. However, the SEM pictures give evidence of show the degradation of the structuration caused by the CF4-plasma and consequently, the superhydrophobicity was not reached. Thus, a plasma-polypyrrole layer was deposited before the plasma-fluorination, which has a protective role against the degradation generated by fluorinated species, preserving the structuration and improving the fluorination rate. Therefore, the obtained surfaces are superhydrophobic with water contact angle of 157 ± 2 ° and a hysteresis of 65 ± 3 °. The ability of these surfaces to reduce bioadhesion will be performed in further work.
    Applied Surface Science 01/2014; 292:782–789. DOI:10.1016/j.apsusc.2013.12.051 · 2.54 Impact Factor
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    ABSTRACT: Different hydrophobic plasma treatments (CF4, CF4/H2, CF4/C2H2, tetramethyl silane (TMS)) were applied to the poly(lactic acid) (PLA) film in order to improve its water and oxygen barrier properties. The plasma parameters, such as power, gas flow and treatment time, were optimized according to the water contact angle measurements. X-ray photoelectron spectroscopy measurements revealed the presence of either fluorine (CF, CF2, CF3) or silicon (SiOxCy) functional groups on the film surface after the fluorinated or TMS plasma treatments, respectively. The thermal properties of the treated PLA films were studied by means of the differential scanning calorimetry (DSC) measurements and were found not to be influenced by the plasma treatment. The water permeability measurements showed an improvement of the PLA barrier properties as a result of all plasma treatments used and, particularly, after CF4/C2H2 plasma. The water vapour sorption measurements confirmed well the improvement of the water barrier properties by the reduction of the water solubility. No impact of the plasma treatment on the oxygen barrier properties of the PLA film was observed, even at high relative humidity (up to 90%).
    RSC Advances 01/2014; 4(11):5626. DOI:10.1039/c3ra45323e · 3.71 Impact Factor
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    ABSTRACT: The surface functionalization of polyimide (Matrimid® 5218) films was carried out by cold plasma treatment with CF4, N2 and O2 gases using a radio frequency discharge and the optimum plasma conditions were evaluated by water contact angle measurements. The surface hydrophobicity of polyimide films was obtained after CF4 plasma treatment, while O2 and N2 plasma treatments contributed to the hydrophilic surface functionalization. X-ray photoelectron spectroscopy (XPS) results revealed the presence of CFx, amino or oxygen-containing groups attached to the polyimide film surface depending on the treatment gas. A strong influence of the used plasma gas on the film roughness was determined by atomic force microscopy (AFM) measurements. The influence of the surface modification on CO2, N2 and O2 gas permeation through the plasma treated films was evaluated. The permeation behaviour was characterized in terms of transport parameters, namely, coefficients of permeability, diffusion and solubility. The permeability coefficient of all plasma treated polyimide films for the studied gases (CO2, N2 and O2) was found to decrease following the order of increasing the kinetic molecular diameter of the penetrant gas. Besides, the selectivity coefficient was found to be significantly increased after the plasma treatments - αCO2/N2 was increased up to 36% and 98% for O2 and N2 plasma treated Matrimid® 5218 films, respectively. The relationship between the gas permeation behaviour and the surface modification of polymer film by cold plasma was discussed.
    RSC Advances 01/2014; 4(59):31036. DOI:10.1039/C4RA03741C · 3.71 Impact Factor
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    ABSTRACT: Immobilization of antibody molecules onto hydrophobic polymeric surfaces with disordered orientation is something unwanted in many applications. To overcome this drawback, controlled immunoglobulin G (IgG) immobilization onto poly(vinylidene fluoride) surface was investigated in this paper. A two-step process involving radiofrequency plasma pretreatment for polymer surface functionalization, followed by coupling reaction was developed, after which immunoglobulin G was immobilized onto the surface directly or via protein-A. IR and XPS data proved that the process is more efficient when the radiofrequency plasma pretreatment was performed using N2 and N2/H2 as discharge gases. NIR-CI, AFM and XPS surface evaluation revealed that immobilization of IgG onto N2/H2 plasma-treated PVDF via grafted protein-A was achieved with an ends-on orientation, leaving available the antigen binding sites of IgG. This procedure could be a promising route for the preparation of oriented IgG assembly onto PVDF, useful in biomedical, membranes or sensors applications. QCM results showed a better antibody-antigen interaction when IgG immobilization onto PVDF substrate is mediated by protein A.
    Colloids and surfaces B: Biointerfaces 11/2013; 115C:139-149. DOI:10.1016/j.colsurfb.2013.11.041 · 4.29 Impact Factor
  • Patrice Glaris, Jean-F. Coulon, Michel Dorget, Fabienne Poncin-Epaillard
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    ABSTRACT: The present work demonstrates how polytetrafiuoroethylene can be textured at both nanometric and microscopic scales by simply controlling the duration and temperature of the polymer annealing. Two main phenomena responsible for the PIPE surface texturing are identified which are the crystallite growth and the stress relaxation. The patterned surfaces were analysed by scanning electron microscopy, differential scanning calorimetry and contact angles measurements. As expected, an enhancement of the hydrophobic and oleophobic properties due to the texturation of the treated PTFE is observed.
    Polymer 10/2013; 54(21):5858-5864. DOI:10.1016/j.polymer.2013.08.011 · 3.77 Impact Factor
  • Fabienne Poncin-Epaillard, Olga Shavdina, Dominique Debarnot
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    ABSTRACT: Biosourced or biodegradable polymers like poly(lactic acid) (PLA) are often base-material for tissue-engineered scaffolds. However, in most of the cases, their bioadhesion properties are not satisfactory. Since the adhesion is controlled both by roughness and surface chemistry, PLA films were textured by applying the breath figure procedure and, then, plasma-treated. Depending on physicochemical characteristics of the breath figure technique, nice hexagonal structures were obtained. Their surface properties, i.e. hydrophobic-hydrophilic balance were controlled by plasma modification. However, their surface decoration could be only preserved with some specific plasma parameters depending on the applied energy and also on the induced surface chemistry.
    07/2013; 33(5):2526-33. DOI:10.1016/j.msec.2013.02.010
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    ABSTRACT: Different polymeric surfaces have been modified in order to reach a high hydrophobic character, indeed the superhydrophobicity property. For this purpose, polypropylene and polystyrene have been treated by RF or μwaves CF4 plasma with different volumes, the results were compared according to the density of injected power. The effect of pretreatment such as mechanical abrasion or plasma activation was also studied. The modified surfaces were shown as hydrophobic, or even superhydrophobic depending of defects density. They were characterized by measurement of wettability and roughness at different scales, i.e. macroscopic, mesoscopic and atomic. It has been shown that a homogeneous surface at the macroscopic scale could be heterogeneous at lower mesoscopic scale. This was associated with the crystallinity of the material. The bioadhesion tests were performed with Gram positive and negative pathogenic strains: Listeria monocytogenes, Pseudomonas aeruginosa and Hafnia alvei. They have demonstrated an antibacterial efficiency of very hydrophobic and amorphous PS treated for all strains tested and a strain-dependent efficiency with modified PP surface being very heterogeneous at the mesoscopic scale. Thus, these biological results pointed out not only the respective role of the surface chemistry and topography in bacterial adhesion, but also the dependence on the peaks and valley distribution at bacteria dimension scale.
    04/2013; 33(3):1152-61. DOI:10.1016/j.msec.2012.12.020
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    ABSTRACT: The possibilities for extracting chemical composition-related information from a singlewavelength X-ray reflectometry experiment are investigated. It is shown that the X-ray absorption of certain elements is sufficient to cause a significant effect on the reflectivity curve, which can be in turn exploited to determine its abundance in the thin film. The limitations are discussed using simulated data and the methodology is applied for the determination of the iodine concentration in iodine-treated thin polyaniline films. More generally the method appears to be very sensitive for the non-destructive determination of the weight percentage of metal nanoparticles in thin polymer films.
    The European Physical Journal Applied Physics 04/2013; 62(1):10304-. DOI:10.1051/epjap/2013130120 · 0.79 Impact Factor
  • Laurent Bélard, Fabienne Poncin-Epaillard, Patrice Dole, Luc Avérous
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    ABSTRACT: Hydrocarbon-like coatings were deposited on different biodegradable polyesters from renewable (bio-based) and non-renewable (fossil-based) resources, such as homopolymers (polylactic acid - PLA, polycaprolactone - PCL) and copolymers (Polyhydroxybutyrate-co-hydroxyvalerate - PHBV, polybutylene adipate-co-terephthalate - PBAT), respectively. The coated samples were tested in terms of adhesion and barrier properties, fragmentation tests, roughness, surface composition and water contact angle measurements. Depending on the substrate, these properties exhibit different behaviours. The coating adhesion of PCL or PHBV is twice higher than the adhesion of coated PLA or PBAT, and depends on the substrate. Barrier performances were mainly improved for both coated PCL and PHBV. Different behaviours are assigned to the change of substrate nature, which induces different interface structure and composition.
    European Polymer Journal 04/2013; 49(4-4):882-892. DOI:10.1016/j.eurpolymj.2012.11.022 · 3.24 Impact Factor
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    ABSTRACT: Polyaniline (PANI) nanostructures are successfully prepared and deposited by in-situ and drop-coating on glass substrates without using any template. By changing synthesis and deposition method, a new morphology of nanostructures, “the cauliflower-like structure”, is developed. These nanostructures were then tested as optical ammonia gas sensors by measuring the optical absorbance variations at 632 nm at different NH3 concentrations. The results show a strong dependence of the morphology on the deposition method. The in-situ one leads to better performances compared to the drop coated one. Protonation /deprotonation is the mechanism of interaction between NH3 molecules and PANI nanostructures.
    04/2013; 685:134-138. DOI:10.4028/www.scientific.net/AMR.685.134
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    ABSTRACT: This review describes different strategies of surface elaboration for a better control of biomolecule adsorption. After a brief description of the fundamental interactions between surfaces and biomolecules, various routes of surface elaboration are presented dealing with the attachment of functional groups mostly thanks to plasma techniques, with the grafting to and from methods, and with the adsorption of surfactants. The grafting of stimuli-responsive polymers is also pointed out. Then, the discussion is focused on the protein adsorption phenomena showing how their interactions with solid surfaces are complex. The adsorption mechanism is proved to be dependent on the solid surface physicochemical properties as well as on the surface and conformation properties of the proteins. Different behaviors are also reported for complex multiple protein solutions.
    ChemInform 12/2012; 3(3):528-543. DOI:10.3390/jfb3030528

Publication Stats

1k Citations
230.08 Total Impact Points

Institutions

  • 1992–2015
    • Université du Maine
      • Institut des Molécules et des Matériaux du Mans (IMMM)
      Le Mans, Pays de la Loire, France
  • 2001–2014
    • French National Centre for Scientific Research
      • • Institut des Matériaux Jean Rouxel
      • • Institut de recherches sur la catalyse et l`environment de Lyon (IRCELYON)
      Lutetia Parisorum, Île-de-France, France