Pascal Carriere

Université de Toulon | USTV · MAPIEM - Laboratoire des MAtériaux, Polymères, Interfaces et Environnement Marin

In order to prepare cured thin films thicknesses in the range of 90−300 nm, epoxy−amine mixtures of different concentrations in toluene are spin-cast onto oxidized silicon substrates. The glass transition temperature of the cured thin films is measured by microthermal analysis, revealing the existence of two distinct glass transitions temperatures...

Nano fibrillated cellulose (NFC) has turned into a material widely studied due to its desirable performance for numerous organic systems. Nevertheless, its surface is not very compatible with most organic systems; hence, chemical functionalization methods offer a path to solve this problem. In this study, NFC is successfully functionalized with two...

Mots clés : vieillissement hydrolytique, thermodurcissables, spectroscopie RAMAN, AFM, sondes La qualité de l'interface d'un matériau composite détermine l'efficacité du transfert des contraintes du renfort vers la matrice. Les méthodes telles que la fragmentation de monofilament ou les tests d'adhésion de la microgoutte donnent des informations re...

Fluorescence spectroscopy using 2D spectra is a technique increasingly used in material science [1]. However, the 3D spectra which correspond to the addition of all the 2D spectra are not yet used to study polymers although they contain a lot of information. Indeed, these 3D spectra give the complete effects of the structure and the environment of...

Le dépôt de monocouches auto-assemblées (SAM) est une technique pratique, simple, et polyvalente pour construire des structures nanométriques bidimensionnelles ordonnées permettant de fonctionnaliser de grandes surfaces. En particulier, les SAMs à base d'organosilanes sur surfaces d'oxyde sont l’objet de beaucoup d'intérêt [1], étant très stables e...

Nano fibrillated cellulose (NFC) has turned into a material widely studied due to its desirable performance for numerous organic systems. Nevertheless, its surface is not very compatible with most organic systems; hence, chemical functionalization methods offer a path to solve this problem. In this study, NFC is successfully functionalized with two...

Alkane chains are the most commonly used molecules for monolayer fabrication. Long chains are used for their strong van der Waals interactions inducing good layer organization. Amine function-terminated alkyl chains are of great interest and are widely used for further surface functionalization. Since it is mandatory that such layers be organized t...

Understanding the interfacial crystallization is crucial for semi-crystalline polymer/natural fiber composites because it links to the final properties. This work reports, for the first time, the interfacial crystallization of a miscible blend between polycaprolactone (PCL) and polyvinylchloride (PVC) with milkweed fibers. We have first described t...

Atomic force microscopy (AFM) has been extensively used for the nanoscale characterization of polymeric materials. The coupling of AFM with infrared spectroscope (AFM-IR) provides another advantage to the chemical analyses and thus helps to shed light upon the study of polymers. This paper reviews some recent progress in the application of AFM and...

Friction is an important limitation of energy efficiency performances of MEMS/NEMS but is, in the same time, a great opportunity for harvesting energy by designing optimized tribo-electric nano-Generators (TENG). Thus, frictional behaviour can be accurately controlled in real time by using thermally sensitive periodic patterned self-assembled monol...

Atomic force microscopy (AFM) has been extensively used for the nanoscale characterization of polymeric materials. The coupling of AFM with infrared spectroscope (AFM-IR) provides another advantage to the chemical analyses and thus helps to shed light upon the study of polymers. In this perspective paper, we review recent progress in the use of AFM...

Alkane chains are the most commonly used molecules for monolayer fabrication. Long chains are used for their strong van der Waals interactions inducing good layer organization. Amine function-terminated alkyl chains are of great interest and are widely used for further surface functionalization. Since it is mandatory that such layers be organized t...

Healable polymers and composites materials offer the ability to prolong the functional lifetime of their resulting structures and coatings. Those materials undergo a thermomechanical healing to an applied stimuli. In order to achieve the mechanical strength required for many structural applications or protective coatings, highly cross-linked polyme...

Vitrimers are a new kind of materials pioneered by Leibler [1]. The viscoelasticity of vitrimers is characterized by two transition temperatures: glass transition temperature (Tg) and the topological freezing transition temperature (Tv). In the case of vitrimers, while the exchangeable covalent bonds in the network as i.e. reversible Diels-Alder bo...

With the use of a low dose, noble metal and transition metal oxides nanoparticles have recently been reported as new effective antibiotics. In general, typical molecular antibiotics affect bacteria via one of three targets: (1) cell wall, (2) translational machineryand (3) DNA replication. Whereas, nanoparticlescould react simultaneously through va...

Les propriétés des zones interfaciales entre un renfort et une matrice étant déterminantes vis-à-vis des propriétés macroscopiques des composites et de leur durabilité, il est nécessaire de parvenir à caractériser finement ces zones. La présence d'un réseau sous-réticulé et/ou plastifié à proximité des fibres ensimées a été démontrée sur différente...

Friction is an important limitation of energy efficiency performances of MEMS/NEMS. However, frictional behaviour can be accurately controlled in real-time by using thermally sensitive periodic patterned self-assembled monolayers of n-octadecyltrichlorosilane (OTS) grafted on MEMS surfaces. Patterns have been created by micro-contact printing (µCP)...

The valorization of abundant and renewable biomaterials with special properties from nature makes a great attention for both manufacturers and researchers. Milkweed fibres (Asclepiad fibre) are considered as perennial plants with umbel-like flowers, which are abundant in Nord American. Milkweed fibres are recently used for many domestic and industr...

Incorporation of nanofillers into the organic coatings might enhance their barrier performance, by decreasing the porosity and zigzagging the diffusion path for deleterious species. Thus, the coatings containing nanofillers are expected having significant barrier properties for corrosion protection and reduce the trend for the coating to blister or...

Design of interphases, mechanical characterizations at local scale apply to : 1.smart interphases in fiber glass composites 2 model interphases using thin films and their hydrolytic ageing

La fabrication de films minces de quelques centaines de nanomètres d'épaisseurs est très importante dans le domaine des revêtements de protection, des adhésifs ou des lubrifiants. La détermination de leurs propriétés est tout aussi importante (modules mécaniques, Tg, énergie d'adhésion). Les systèmes époxy-amines réticulés au contact d'un substrat...

Polymer composite materials have been being extensively used in aerospace and more recently in automotive applications thanks to their high mechanical performances and good fatigue durability that offer definite advantages compared to the traditional materials. However, to evaluate the stability of polymer composite materials in a certain environme...

Mots-clés: hygrothermal ageing, glass transition temperature, young modulus, interface Epoxy resins are commonly used as binding agents or as resins in structural composites for marine, aerospace or microelectronic packaging. Even though, the highly cross-linked nature afford this resin to confer good mechanical properties, anti-corrosion propertie...

The surface modification of synthesized nano-BaTiO3 particles was carried out using γ-aminopropyl trimethoxy silane (γ-APS) in an ethanol/water solution. The modified particles were characterized by FTIR, TGA, surface charge analysis, and by dielectric constant measurement. The silane molecules were attached to the surface of BaTiO3 particles throu...

Application to study the composites materials hydrothermal ageing and to design new surfaces with marine anti-fouling properties The scientific results introduce in this thesis of Habilitation à Diriger les Recherche (HDR), high level degree in France, are parts of the main themes of the MAPIEM laboratory (http://mapiem.univ-tln.fr) : fight against...

H NMR highlighted specific interactions between PEO and stereoregular PMMAs in dilute CDCl3 solution. Whilst syndiotactic PMMA does not specific interact with PEO, isotactic PMMA does. These specific interactions between i-PMMA and PEO induce a dual narrow size distribution of agglomerates whatever the i-PMMA-PEO stoichiometry. In a first step, i-P...

An easy method for preparing supported homogeneous epoxy–amine thin films on a silica surface consisting of two distinct layers was developed via spin coating from epoxy–amine solutions. Because of these two layers had the controlled properties of the upper layer, we showed that it was possible to precisely control the epoxy–amine stoichiometry in...

Composites of lead zirconate titanate (PZT) 50 nm nanoparticles and epoxy resins have been produced with various PZT contents from 0 to 20 wt%. The morphology and thermal properties of prepared composites were characterized using scanning electron microscopy and differential scanning calorimetry. The PZT nanoparticles were found to be well disperse...

New sub-micronic capsules based on a copolymer of maleic anhydride-alt-vinyl acetate and a natural polymer (gelatin) using an interfacial condensation method were obtained. Sub-micronic capsules were characterized by Fourier Transform infrared spectroscopy (FTIR), dynamic light scattering (DLS) method, zeta-potential, scanning electron microscopy (...

Micro/nanotribological study of self-assembled monolayers (SAMs) derived from n-alkyltrichlorosilanes deposited on silicon wafers displaying various crystallographic orientations—Si (100), Si (111) and Si (110)—has been conducted using a ball-on-disc nanotribometer. The parameters that have been varied are (i) the alkyl chain length, (ii) the tribo...

The nanoscale patterns formed by poly(methyl methacrylate) (PMMA) stereocomplexes at the surface of silicon wafers, glass and mica, were investigated by tapping mode atomic force microscopy (TM-AFM). The effects of the solvent nature, PMMA concentration, i/s-ratio (stoechimetry) and surface nature on the morphology of the stereocomplex thin layer a...

This investigation highlighted the equivalence between carbon black (CB) loading and structure influences on dynamic mechanical properties in the linear behavior of several filled synthetic rubber compounds. Different morphologies (specific surface area and structure) of CB incorporated at different loadings were formulated to modulate the filler-r...

Le tableau suivant récapitule les propriétés des mousses d'oxyde d'hafnium synthétisées en laboratoire selon l'invention. Propriétés Matériau HfO2 dense Mousse (granulométrie) HfO2 (2mm-1mm) HfO2 (1mm-300µm) HfO2 (300µm-0) Température de fusion (°C) 2810 Conductivité thermique (W/m.K) 1,67 <1,67 Paramètres cristallins ou paramètres de mailles Systè...

Thin 200-nm epoxy–amine mixtures were cured on silicon wafers with different surface chemistry to quantify the effect of the chemistry on the glass transition temperature evolution in ultra-thin thermosetting films. Two surface treatments were investigated: the first one only consisted in the activation of the silanols groups at the silicon surface...

The adsorption of stereoregular polymers and its effect on the conformation and dynamics of the polymer at interfaces are only poorly understood. 1H NMR has revealed a lowering of the peaks assigned to isotactic sequences whatever the PMMA tacticity, which provides evidence of stereospecific adsorption of the isotactic segments on silica. Entropic...

After briefly discussing the particularity of the adsorption process of PMMA aggregates in terms of aggregative adsorption, the patterns formed by poly(methyl methacrylate) (PMMA) stereocomplexes at the surface of silicon wafers, glass, and mica were investigated by tapping mode atomic force microscopy. The effects of the solvent nature, PMMA conce...

After briefly discussing the particularity of the adsorption process of PMMA aggregates in terms of aggregative adsorption, the patterns formed by poly(methyl methacrylate) (PMMA) stereocomplexes at the surface of silicon wafers, glass, and mica were investigated by tapping mode atomic force microscopy. The effects of the solvent nature, PMMA conce...

The mechanisms of the adsorption of stereoregular polymers are only poorly understood. This work is devoted to the study of the influence of PMMA tacticity and conformation on the interfacial behavior of the polymer. 1 H NMR usually used to determine the tacticity of PMMA in solution in CDCl3 can also be applied to systems containing the adsorbed p...

The glass transition temperature (Tg) of thin supported films of stereoregular poly(methyl methacrylate) on silicon has been investigated by ellipsometry in temperature. The Tg of the spin coated layers of isotactic PMMA increases for thickness lower than 100 nm whereas a depression of the Tg is observed for the syndiotactic PMMA. This opposite tre...

The temperature induced conformational transition of stereoregular PMMA in diluted or semi-diluted solution was studied by viscometry, NMR and FT-IR. The conformational energies of polymer chains were calculated from infrared spectral subtraction by following the method described by O’Reilly and Mosher [O’Reilly JM, Mosher RA. Macromolecules, 14 (1...

The adsorption of bovine serum albumin (BSA) onto polystyrene latexes bearing various amounts of sugar moieties has been investigated as a function of pH and ionic strength and the results were compared to those for bare polystyrene latexes having negative surface charges. The functionalized latexes were produced by seeded copolymerization of (0.3...