C. Sollogoub

• Professor
• Professor (Assistant) at National Conservatory of Arts and Crafts

Shape-morphing systems offer multiple functionalities in a single part by leveraging compliance and bistability principles. Compliant mechanisms, composed of flexible structural elements, derive motion from deflection rather than from traditional joints. Structures exhibiting two stable equilibria are termed bistable. These bistable mechanisms can...

The number of free surfaces in a polymer ultra-thin film has a strong influence on its physical and mechanical properties. In this study, Young’s modulus as well as the glass...

The development of environmentally friendly polymer‐based materials with antibacterial and biodegradable properties is bringing significant benefits to the packaging industry. In the present work, green‐synthesized zinc oxide microporous particles (ZnO MPs) are dispersed in the poly(3‐hydroxybutyrate) (PHB) matrix using a simple casting method to p...

The rheology of coextruded layered films of polystyrene/poly(methyl methacrylate) (PS/PMMA) has been studied with small and large amplitude oscillations at a temperature above their glass transition. While the complex viscosity remains constant over the experimental time window for the micron-sized layered films, a decrease has been observed for th...

The rheology of coextruded layered films of polystyrene/poly(methyl methacrylate) (PS/PMMA) has been studied with small and large amplitude oscillations at a temperature above their glass transition. While the complex viscosity remains constant over the experimental time window for the micron-sized layered films, a decrease has been observed for th...

The surface properties of biomaterials interact directly with biological systems, influencing cellular responses, tissue integration, and biocompatibility. Surface topography plays a critical role in cardiac tissue engineering by affecting electrical conductivity, cardiomyocyte alignment, and contractile function. Current methods for controlling su...

This study investigates the effects of molecular weight and crystallinity of polylactic acid (PLA) on the morphology and crystallization behavior of polyhydroxybutyrate (PHB)/PLA blends. Utilizing a solution casting method, we discovered that the molecular characteristics of PLA significantly influence the thermal and structural properties of the b...

Liquid nanofilms are ubiquitous in nature and technology, and their equilibrium and out-of-equilibrium dynamics are key to a multitude of phenomena and processes. We numerically study the evolution and rupture of viscous nanometric films, incorporating the effects of surface tension, van der Waals forces, thermal fluctuations, and viscous shear. We...

Three layers film shaped by thermocompression of acrylonitrile butadiene styrene copolymer and polycarbonate have been analyzed in dynamic mechanical thermal analysis in tensile mode. They present two peaks as the film is loaded perpendicularly to the layers and three peaks as the film is loaded in parallel to the layers. Numerical computations con...

The measurement of interfacial mechanical or rheological properties in polymer blends is a challenging task, as well as providing a quantitative link between these properties and the interfacial nanostructure. Here, we perform a systematic study of the extensional rheology of multilayer films of an immsicible polymer pair, polystyrene and poly(meth...

Liquid nanofilms are ubiquitous in nature and technology, and their equilibrium and out-of-equilibrium dynamics are key to a multitude of phenomena and processes. We numerically study the evolution and rupture of viscous nanometric films, incorporating the effects of surface tension, van der waals forces, thermal fluctuations and viscous shear. We...

Tissue engineering benefits from advances in 3D printing and multi‐material assembly to attain certain functional benefits over existing man‐made materials. Multilayered tissue engineering constructs might unlock a unique combination of properties, but their fabrication remains challenging. Herein, a facile process is reported to manufacture biomat...

Self‐assembly of high molecular weight commercially available low χ ABA triblock copolymers with ionic liquids (ILs) was observed after solvent casting without the implementation of an additional annealing step. Here, the addition of an IL to a triblock copolymer poly(methyl methacrylate‐b‐butyl acrylate‐b‐methyl methacrylate) (MAM) with an elastom...

The interfacial stability of multilayer Couette flow is investigated experimentally. A better understanding of this flow is critical for the processing of multilayer polymeric structures, such as multilayer coextrusion. We first look at the liquid film rupture predictions from numerical simulations of the thin film equation that considers capillary...

This work highlights the influence of layer thicknesses on glass transition and molecular mobility in polycarbonate (PC) and poly(ethylene terephthalate glycol) (PETg) multilayered films obtained by the layer-multiplying coextrusion process. By combining modulated temperature scanning calorimetry (MT-DSC) and dielectric relaxation spectroscopy (DRS...

The development of polylactide (PLA)/cellulose nanocrystals (CNC) nanocomposites in the aim to increase gas barrier properties has been widely studied, but gave rise to conflicting results. To better understand the underlying gas transport mechanisms, PLA/CNC nanocomposites were produced at concentrations between 5 and 50 wt%. The role of the PLA/C...

This work is a first attempt to study the crystallization behavior of ethylene-vinyl alcohol copolymer with 44 mol% of ethylene units (EVOH44) and to observe the supermolecular structures developed during its crystallization. Thermal analysis has evidenced a very fast crystallization and the formation of different crystal populations during isother...

An experimental investigation is reported on the effect of shear on the bursting of molten ultra-thin polymer films embedded in an immiscible matrix. By using an optical microscope coupled with a shearing hotstage, the dewetting dynamics, i.e. the growth of dewetting holes is monitored over time at various shear rates. It is observed that their cir...

Dual transient networks were prepared by mixing highly charged long wormlike micelles of surfactants with polysaccharide chains of hydroxypropyl guar above the entanglement concentration for each of the components. The wormlike micelles were composed of two oppositely charged surfactants potassium oleate and n-octyltrimethylammonium bromide with a...

The objective of this work is to give new insight into the stability of thin polymer films under shear, in order to pave the way to a better control of the nanolayer coextrusion process. To do so, a finite-difference numerical scheme for the resolution of the thin film equation was set up taking into account capillary and van der Waals (vdW) forces...

Nanocomposites of poly(lactide) (PLA) and cellulose nanocrystal (CNC) were fabricated using two different types of covalently grafted surface compatibilizers, namely fatty acids (lauric or stearic acid) and poly(glycidyl methacrylate) (PGMA) bearing reactive epoxy end-groups. Temperature-Modulated DSC analysis informed on weak attractive interactio...

In this work, the influence of a compliant hyperelastic polymeric phase infiltrated inside stiff auxetic lattices is studied through experimental and numerical approaches. Samples were fabricated using material jeting technology (MJT). The design principle mimics examples of biological materials wich combine stiff and compliant materials to attain...

The objective of this work is to study the role of shear on the rupture of ultrathin polymer films. To do so, a finite-difference numerical scheme for the resolution of the thin film equation was set up taking into account capillary and van der Waals (vdW) forces. This method was validated by comparing the dynamics obtained from an initial harmonic...

Food packaging films must be reinvented in order to answer the new demanding ecological requirements. Biobased and/or biodegradable polymers appear as an interesting alternative to reduce petroleum dependence and carbon dioxide emissions. Poly(ethylene furanoate) (PEF) appears today as a new promising biopolymer thanks to its good gas barrier and m...

The barrier performance and structural lightening of organic materials are increasingly desired and constitute a major challenge for manufacturers, particularly for transport and packaging. A promising technique which tends to emerge in recent years is that of multinanolayer coextrusion. The advantage is that it can produce multilayers made of thou...

In the present study, copolymers of Pyrrole (Py) with different co-monomers (thiophene derivatives) were originally polymerized through two radiolytic approaches: water radiolysis and dichloromethane radiolysis. This method can be easily...

Biodegradable PLA/PBSA multinanolayer nanocomposites were obtained from semi-crystalline poly(butylene succinate-co-butylene adipate) (PBSA) nanolayers filled with nanoclays and confined against amorphous poly(lactic acid) (PLA) nanolayers in a continuous manner by applying an innovative coextrusion technology. The cloisite 30B (C30B) filler incorp...

As alternative radiolytic approach, the synthesis of P3HT was made possible thanks to the oxidation of 3HT monomers by chloromethyl and dichloromethyl radicals or by their corresponding peroxyl radicals in situ produced by dichloromethane solvent radiolysis. Under two different experimental conditions, in oxygen-free solution and in oxygen-saturate...

The purpose of this work is to study the desalination of brackish water using a new ion exchange membrane, made from sulfochlorated polyethersulfone (Cl-PES), and crosslinked using aminated polyethersulfone (NH2-PES) as a crosslinking reagent. This membrane, named ClNH2 membrane, has been obtained by reaction between Cl-PES with 1.3 SO2Cl groups pe...

In this research work, the synthesis and characterization of new ion exchange membranes made from sulfonated polyether sulfone (SPES) crosslinked by aminated PES (NH2PES) crosslinking reagent have been investigated for electrodialysis (ED) applications. Sulfonated and aminated PES have similar chemical structures that allow a good compatibility, th...

Rheological behavior of nanolayered films of polyethylene/polyamide 6 (PE/PA6) compatibilized in situ during the coextrusion process has been studied at a temperature between the melting temperatures of PE and PA6. Thanks to the high number of interfaces, a drastic increase in dynamic moduli has been measured when increasing the interphase volume f...

Rheological behavior of nanolayered films of polyethylene/polyamide 6 (PE/PA6) compatibilized in situ during the coextrusion process has been studied at a temperature between the melting temperatures of PE and PA6. Thanks to the high number of interfaces, a drastic increase in dynamic moduli has been measured when increasing the interphase volume f...

In this work, synthesis of nanostructured conducting poly(3-thiophene acetic acid) (PTAA) polymers was developed by means of gamma-induced oxidative polymerization of TAA monomers dissolved either in water or in dichloromethane....

The attainable lateral resolution of electrostatic force microscopy (EFM) in ambient air environment on dielectric materials was characterized on a reference sample comprised of two distinct, immiscible glassy polymers cut in the cross-section by ultramicrotomy. Such sample can be modeled as two semi-infinite dielectrics with a sharp interface, pre...

The barrier properties of poly(L-lactide) (PLLA) were investigated in multi-nanolayer systems, probing the effect of confining, the compatibility between the confining and the confined polymer, crystal orientation and amorphous phase properties. The multilayer co-extrusion process was used to confine PLLA between two amorphous polymers (polystyrene...

Polyester multilayer membranes with more than 2000 alternating layers of poly(lactic acid) (PLA) and poly(butylene succinate) (PBS) were successfully prepared via a nanolayer coextrusion process equipped with a multiplying-element device. This process allows to make films consisting of very thin layers of polymers and in which a confinement effect...

Measuring the viscoelastic behavior of polymers in the vicinity of a surface or under confinement is an experimental challenge. Simple rheological tests of nanolayered films of polyethylene/polyamide 6 compatibilized in situ during the coextrusion process enabled the probing of these interfacial properties. Taking advantage of the different melting...

Negative Poisson's ratio materials, or auxetics, have drawn attention for the past 30 years. The auxetic effect could lead to improved mechanical properties such as acoustic damping, indentation resistance or crashworthiness. In this work, two 3D auxetic lattices are introduced. Auxeticity is achieved by design through pre-buckling of the lattice s...

A multilayer film composed of alternating layers of polycarbonate (PC) and poly(m-xylene adipamide) (MXD6) was elaborated by using an innovative multilayer coextrusion process. Quasi-continuous thin MXD6 layers (nanolayers) alternating with PC layers were successfully obtained. The PC/MXD6 multilayer film showed a confining effect of MXD6 exerted b...

The physical aging behavior of amorphous polylactide constrained against polystyrene in layers of 300 nm, thanks to the layer–multiplying co–extrusion process, was investigated by fast–scanning calorimetry (FSC). By cooling down the sample from the liquid state to the glassy one at very fast scanning rates, it was possible to investigate the struct...

A new and simple promising method for synthesizing conducting polymers in organic solvents was successfully achieved for the first time thanks to the oxidative polymerization of 3,4-ethylenedioxythiophene (EDOT) monomers dissolved in dichloromethane by means of gamma-radiolysis. EDOT polymerization was controlled and optimized thanks to the study o...

In capillary-driven fluid dynamics, simple departures from equilibrium offer the chance to quantitatively model the resulting relaxations. These dynamics in turn provide insight on both practical and fundamental aspects of thin-film hydrodynamics. In this work, we describe a model trilayer dewetting experiment elucidating the effect of solid, no-sl...

In capillary-driven fluid dynamics, simple departures from equilibrium offer the chance to quantitatively model the resulting relaxations. These dynamics in turn provide insight on both practical and fundamental aspects of thin-film hydrodynamics. In this work, we describe a model trilayer dewetting experiment elucidating the effect of solid, no-sl...

Multilayer films comprising polystyrene (PS)/polymethyl methalcrylate (PMMA) and PS/polycaprolatone (PCL) alternating nanolayers with varied layer thickness were fabricated by multilayer coextrusion. The nanolayers breakup phenomena of PMMA and PCL were characterized using atomic force microscopy (AFM), oxygen permeability, light transmission, wide...

Improving overall properties of poly(lactic acid) (PLA) by blending it with another biobased polymer has been a strong field of research over the last years. In this study we demonstrate the synergetic effect of a small amount (between 0.1 and 1 wt%) of oligomer-like PLA (oLA) on the thermal, mechanical and gas barrier properties of the widely stud...

Multi-nanolayered polystyrene/poly(l,l-lactide) (PS/PLLA) films were obtained by the layer-multiplying coextrusion process, with an individual PLLA layer thickness as thin as 20 nm. The confinement of the amorphous PLLA induced a change in the molecular mobility, evidenced by a drop of the cooperative rearranging region (CRR) size at the glass tran...

Multilayer coextrusion processing was applied to produce 2049-layer film of poly(butylene succinate-co-butylene adipate) (PBSA) confined against poly(lactic acid) (PLA) using forced assembly, where the PBSA layer thickness was about 60 nm. This unique technology allowed to process semi-crystalline PBSA as confined polymer and amorphous PLA as confi...

An experimental study was carried out to investigate the existence of a critical layer thickness in nanolayer coextrusion, under which no continuous layer is observed. Polymer films containing thousands of layers of alternating polymers with individual layer thicknesses below 100 nm have been prepared by coextrusion through a series of layer multip...

Semicrystalline polylactide (PLA) films with controlled morphology were produced by thermal crystallization to optimize the oxygen barrier properties. The crystalline morphology of PLA at the scales of the lamella and the spherulite was investigated and the mobile amorphous phase dynamics were studied. The crystalline morphology had a negligible im...

Films of PC and MXD6 were prepared via multilayer coextrusion. Films presenting stretched nodules/lamellas of MXD6 in the PC matrix, and films with quasi-continuous thin MXD6 layers alternating with PC layers were obtained. The transport properties were specifically investigated from water and gas permeation kinetics, and the corresponding permeati...

The size of representative microstructural samples obtained from atomic force microscopy is addressed in this paper. The case of an archetypal one-dimensional nanolayered polymer blend is considered. Image analysis is performed on micrographs obtained through atomic force microscopy, yielding statistical data concerning morphological properties of...

We show that the kinetics of bursting of a thin film embedded in another polymer matrix can be well described by a simple equation balancing the viscous and capillary forces. The role of viscosity, interfacial tension and thickness of the layers under static conditions was investigated by adapting a simple model experiment initially designed to stu...

Polylactide (PLA) is the most used biodegradable and biobased food packaging polymer for rigid containers and films. However, its low ductility is a hurdle for increasing applications in flexible food packaging. A solution is the use of additives. Palm oil deodorization condensates (PODC) revealed to be an excellent additive promoting PLA ductility...

In order to study the effect of cleaning operations on polyvinylidene fluoride (PVDF) hollow fiber membrane stability, ageing of two PVDF based membranes (one is additive free, the other contains hydrophilic additives) in contact with sodium hypochlorite solutions with various pH values has been studied. The aim of this experimental study was to id...

We report the making of multilayered self-assembled films by coextrusion, composed of alternated layers of confining polycarbonate and confined poly(styrene-b -butadiene-b -methyl methacrylate), whose blocks are chemically different from the confining polymer, and presenting a self-assembled morphology directly after extrusion. The triblock copolym...

Conference Biopol2015, San Sebastian, Spain

Polylactide (PLA) which is already available in large commercial quantities shows a good potential as biobased and biodegradable polymer in several sectors. Nevertheless its low ductility narrows its usage potential needed to manufacture efficient thermoplastic films for food packaging. External plasticization is the main solution employed trying t...

The use of industrial by-products of the vegetable oil industry as ductility agents of polylactide (PLA) was investigated. Vegetable oil deodorization condensates were melt-blended by twin-screw extrusion up to a maximum inclusion quantity of 20 wt% without preliminary purification. Sample films were obtained by single screw cast extrusion. Compoun...

Changes in the thermomechanical properties of polylactide (PLA) plasticized by two biodegradable and biobased molecules, Polysorb ID37 (PID37) and squalene, were compared to formulations with petroleum-based plasticizers, namely, acetyl tributyl citrate, poly(ethylene glycol) 400, and dioctyl adipate (DOA). The solubility parameters of the additive...

Environ 40 % des matières plastiques annuellement produites trouvent des débouchés dans des utilisations à courte durée de vie telles que l’emballage. L’utilisation de ressources renouvelables, ainsi que la production de matériaux biodégradables à durée de vie raisonnée, sont des solutions pertinentes afin de réduire l’impact écologique de la filiè...

Two new types of proton exchange membranes used in proton exchange membrane fuel cell (PEMFC) were synthesized from sulfochlorinated polyethersulfone (PES (polyarylethersulfone)–SO2Cl). One, called S-PESB, was obtained by grafting butylphenol in an amount of 0.3 equivalent per monomer unit. The second (S-PESTD) was prepared by cross-linking with 0....

The PIMM (Processes and Engineering in Mechanics and Materials) laboratory has been involved in the development of architectured materials at multiple scales: at the nanoscale with nanostructured polymer blends and nanocomposites; at the microscale with laser-controlled microstructural tailoring of metals, including functionally graded materials, a...

Il existe une préoccupation croissante en matière d’environnement se traduisant par une demande citoyenne de produits « verts ». Néanmoins, ces derniers doivent posséder des performances égales ou supérieures aux matériaux synthétiques communément utilisés afin d’être concurrentiels. Actuellement, dans le secteur de l’emballage alimentaire, une des...

L'acide polylactique (PLA) est actuellement un des bioplastiques les plus utilisés dans le domaine de l'emballage alimentaire, malgré l'ample domination du marché mondial par les matières d'origine pétrochimique. Mais sa cristallisation, qui dicte ses propriétéss (mécaniques, barrière aux gaz, etc) est relativement complexe et induit des comporteme...

Influence of the plasticizer chemical structure on the plasticization behaviour of PLA A. Ruellan, A. Guinault, C. Sollogoub, V. Ducruet, S. Domenek poly(lactic acid), polylactide, plasticizer, ATBC, DOA, PEG, polysorb ID37, solubility parameters, free volume, lubrication, polar interactions. Abstract Changes in the mechanical and thermal properti...

The mechanical and frictional properties of polystyrene, polymethylmethacrylate and nanocomposites with montmorillonite were studied by using the microindentation technique and frictional microscopy. The micromechanical tests revealed a decrease in the modulus and microhardness of the composite compared with those of a neat polystyrene, with a mini...

The thermo-oxidative degradation of polylactide (PLA) films was studied between 70 and 150 °C. It was shown that the oxidative degradation of PLA leads to a random chain scission responsible for a reduction of the molar mass. These molar mass changes affect Tg and the degree of crystallinity, and it was found that Tg decreases according to the Fox–...

Composition modifiant les propriétés mécaniques d'un polymère thermoplastique

Synthesis and characterization of new ion exchange membranes made from chlorosulfonated polyethersulfone (SO2Cl-PES) crosslinked by polyaminated crosslinking reagents have been performed. Two examples are described: one crosslinked by hexane diamine, the other by amino-polyethersulfone (NH2-PES). Sulfonated polyether sulfone (S-PES) and NH2-PES hav...

The use of renewable resources and biodegradable materials are appropriate solutions to reduce the environmental impact of plastics if only they have equal or superior performances to synthetic ones currently used at comparative prices. One of the most prominent polymers among these materials is polylactide (PLA), a thermoplastic aliphatic polyeste...

Thermo-oxidative degradation of polylactide (PLA) at low temperature: physical and mechanical aspects D. Rasselet1,2, A. Ruellan1,3, A. Guinault1,2, G. Miquelard-Garnier1,2, C. Sollogoub1,2 and B. Fayolle1 Damien.Rasselet@laposte.net, Alexandre.Ruellan@agroparistech.fr, Alain.Guinault@cnam.fr, Guillaume.Miquelard_Garnier@cnam.fr, Cyrille.Sollogo...

2 É cole de Technologie Sup erieure, Chaire des Mat eriaux et É quipements Utilis es en Sant e et S ecurit e du Travail, 1100 rue Notre-Dame Ouest, Montr eal QC, H3C 1K3, Canada 3 AgroParisTech, UMR 1145 Ing enierie Proc ed e Aliment, 1 avenue des Olympiades, ABSTRACT: The morphology and miscibility of commercial poly(lactide) (PLA)/poly(b-hydroxyb...

Multilayer coextrusion was used to disperse Carbon Nanotubes (CNT) in polypropylene (PP). The dilution of commercially available masterbatches using a twin-screw extruder was first applied to produce several formulations, which were then mixed with PP using a multilayer coextrusion device to obtain films or pellets with CNT concentrations between 0...

Poly(lactic acid) (PLA) is a biodegradable thermoplastic polyester derived from renewable resources which may replace conventional polymers for some applications. To overcome some of its limitations such as poor gas barrier properties and low elongation at break, one method is to blend PLA with small amounts of other bio-based polymers. In this stu...

Blending poly(lactic acid) (PLA) with a small amount of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV; 10 wt%) using a custom multilayer co-extrusion process increases both ductility and gas barrier properties of extruded films compared with neat PLA and classical blending methods. The co-extrusion process allows multiplication of the number o...

Thermoforming of PLA-PHBV films: effect on their morphology and gas barrier properties A. Ruellan, A. Guinault, S. Domenek, V. Ducruet, M. Boufarguine, G. Miquelard-Garnier and C. Sollogoub Key words: PLA, polylactic acid, thermoforming, morphology, gas barrier properties Introduction Driven by environmental concerns, new polymers based on renewa...

Cette étude présente des résultats obtenus sur l’élaboration de composites à base de polypropylène recyclé renforcé par des fibres végétales (fibres de bambou), fabriqués à l’aide d’une extrudeuse double vis modulaire pour produire un composite sous forme de granulés transformables. L’effet de la teneur en fibres de bambou, du compatibilisant et de...

function of stereochemistry and crystallinity degree. Poly(L-lactide) and poly(D,L-lactide) films were obtained by extrusion and thermally cold crystallized in either a0- or a-crystalline form with increasing crystallinity degree. Annealing of the films at low temperatures yielded to a0-crystals as well as the creation of a rigid amorphous fraction...

Our goal in the present work was to synthesize a new proton exchange membrane that could be used in proton exchange membrane fuel cell (PEMFC), based on a blend of sulfonated polyethersulfone (S-PES) and sulfonated polyethersulfone octylsulfonamide (S-PESOS). Five blends, using S-PESOS with different grafting ratios of sulfonamide groups, have been...

Poly(lactic acid) (PLA) is a biodegradable, thermoplastic, aliphatic polyester derived from renewable resources, which is a potential candidate to replace conventional polymers in food packaging applications.. Other bio-based materials like polyhydroxyalkanoates (in our case PHBV) could be associated with PLA in order to improve its gas barrier pro...

Our goal in the present work was to synthesize a new proton exchange membrane that could be used in proton exchange membrane fuel cell (PEMFC), based on a blend of sulfonated polyethersulfone (S-PES) and sulfonated polyethersulfone octylsulfonamide (S-PESOS). Five blends, using S-PESOS with different grafting ratios of sulfonamide groups, have been...