Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
ISSN: 0043-1648

hal-01679411
https://hal.univ-antilles.fr/hal-01679411
DOI : 10.1016/j.wear.2004.11.019

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
The structural parameters of fluorinated nanocarbons presenting different shapes, i.e. spherical, tubular and discotic are investigated and correlated to their tribological properties. Different fluorination rates of graphitized carbon blacks (0D), carbon nanofibres (1D) and a mixture of carbon nanodiscs and nanocones (2D) were achieved under pure molecular fluorine gas flow (direct fluorination). Raman spectrometry, X-ray diffraction and 19F solid state nuclear magnetic resonance underline similar structure and nature of the C-F bonds (covalent) for equivalent fluorine contents. In spite of the similarities of physical-chemical properties at equivalent fluorine contents, the tribological properties of the fluorinated nanocarbons differ. Those properties are discussed taking into account the role of the fluorine content and location of the fluorine atoms in the decrease of the interparticle interactions and in the cleavage of the external fluorocarbon layers to form the tribofilm. Finally, the effect of the shape is discussed.
ISSN: 0022-1139

hal-00787267
https://hal.archives-ouvertes.fr/hal-00787267

Éditeur(s) : HAL CCSD Springer Verlag
Résumé : International audience
ISSN: 1023-8883

hal-01680425
https://hal.univ-antilles.fr/hal-01680425
DOI : 10.1007/s11249-014-0421-1

Éditeur(s) : HAL CCSD Springer Verlag
Résumé : International audience
ISSN: 1023-8883

hal-01685764
https://hal.univ-antilles.fr/hal-01685764
DOI : 10.1007/s11249-014-0421-1

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
Low Density Polyethylene (LDPE) films were treated by direct fluorination at different conditions, i.e. static and dynamic ones. Modification of the treated films chemical composition was studied by spectroscopic methods (solid state NMR, XPS and infrared spectroscopy). Surface morphology was investigated by SEM and AFM. Also surface energy measurements and electron paramagnetic resonance (EPR) were carried out. Direct fluorination resulted in printability, barrier properties towards O2 and tribological properties enhancement. On the contrary, the barrier properties towards water, initially good, were not improved but maintained.
ISSN: 0257-8972

hal-01324133
https://hal.archives-ouvertes.fr/hal-01324133
DOI : 10.1016/j.surfcoat.2016.03.021

Éditeur(s) : HAL CCSD Springer Verlag
Résumé : International audience
The tribologic properties of graphitized carbon blacks and their fluorinated derivatives are investigated as a function of the fluorination rate. Very low intrinsic friction coefficients are obtained for highly fluorinated compounds. The correlation of the tribologic results and structural investigations of the initial compounds by TEM strongly suggests that the friction mechanisms involve surface effects in the early stage of friction. Long-term tribologic experiments and Raman analyses point out an evolution of the structure and composition of the tribofilms during the friction process leading to similar friction properties of the tribofilms. Wear studies revealed that highly fluorinated derivatives appear less efficient than pristine and weakly fluorinated compounds.
ISSN: 1023-8883

hal-01121785
https://hal.archives-ouvertes.fr/hal-01121785
DOI : 10.1007/s11249-014-0406-0

Éditeur(s) : HAL CCSD Cambridge University Press (CUP)
Résumé : International audience
ISSN: 1431-9276

hal-01680427
https://hal.univ-antilles.fr/hal-01680427
DOI : 10.1017/S1431927614010654

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
ISSN: 0022-1139

hal-01085995
https://hal.archives-ouvertes.fr/hal-01085995
DOI : 10.1016/j.jfluchem.2014.09.021

Éditeur(s) : HAL CCSD
Résumé : International audience
In boundary lubrication regime, friction reduction and antiwear processes are associated to the presence of additives in the lubricating oils or greases. These processes are due to the formation of protective tribofilms resulting from chemical reactions between the additives and the sliding surfaces, in the physico-chemical conditions of the sliding contact. Conventional antiwear additives mainly consist of transition metal organo phosphate or thiophosphates which present a remarkable efficiency in the case of contacts between ferrous alloys. In the case of non reacting surfaces, these additives become inactive. Recently developped lubrication strategies consist in the use of dispersion in oils of nano additives able to build the protective tribofilm in the sliding contact without reaction with the surfaces. Carbon fluorinated phases, due to their lamellar structure and their high chemical stability even at relatively high temperature (400°C) represent interesting candidates as lubricant nano-additives subjected to present friction reduction, anti wear and anti corrosion actions. This work presents the tribologic behaviour of some carbon fluorinated derivatives such as graphite fluorides, fluorinated carbon nanofibers, fluorinated carbon nanodiscs and fluorinated carbon blacks. The influence, on the tribologic performances, of the structure of the initial carbon phases, of the fluorination rate (0
World Tribology Congress 2013
Torino, Italy

Droits : info:eu-repo/semantics/OpenAccess
hal-00926514
https://hal.archives-ouvertes.fr/hal-00926514
https://hal.archives-ouvertes.fr/hal-00926514/document
https://hal.archives-ouvertes.fr/hal-00926514/file/Delbe_9783.pdf
OATAO : 9783

Éditeur(s) : HAL CCSD Wiley/Blackwell
Résumé : International audience
This article documents the addition of 512 microsatellite marker loci and nine pairs of Single Nucleotide Polymorphism (SNP) sequencing primers to the Molecular Ecology Resources Database. Loci were developed for the following species: Alcippe morrisonia morrisonia, Bashania fangiana, Bashania fargesii, Chaetodon vagabundus, Colletes floralis, Coluber constrictor flaviventris, Coptotermes gestroi, Crotophaga major, Cyprinella lutrensis, Danaus plexippus, Fagus grandifolia, Falco tinnunculus, Fletcherimyia fletcheri, Hydrilla verticillata, Laterallus jamaicensis coturniculus, Leavenworthia alabamica, Marmosops incanus, Miichthys miiuy, Nasua nasua, Noturus exilis, Odontesthes bonariensis, Quadrula fragosa, Pinctada maxima, Pseudaletia separata, Pseudoperonospora cubensis, Podocarpus elatus, Portunus trituberculatus, Rhagoletis cerasi, Rhinella schneideri, Sarracenia alata, Skeletonema marinoi, Sminthurus viridis, Syngnathus abaster, Uroteuthis (Photololigo) chinensis, Verticillium dahliae, Wasmannia auropunctata, and Zygochlamys patagonica. These loci were cross-tested on the following species: Chaetodon baronessa, Falco columbarius, Falco eleonorae, Falco naumanni, Falco peregrinus, Falco subbuteo, Didelphis aurita, Gracilinanus microtarsus, Marmosops paulensis, Monodelphis Americana, Odontesthes hatcheri, Podocarpus grayi, Podocarpus lawrencei, Podocarpus smithii, Portunus pelagicus, Syngnathus acus, Syngnathus typhle,Uroteuthis (Photololigo) edulis, Uroteuthis (Photololigo) duvauceli and Verticillium albo-atrum. This article also documents the addition of nine sequencing primer pairs and sixteen allele specific primers or probes for Oncorhynchus mykiss and Oncorhynchus tshawytscha; these primers and assays were cross-tested in both species.
ISSN: 1755-098X

hal-01094222
https://hal-agroparistech.archives-ouvertes.fr/hal-01094222
DOI : 10.1111/j.1755-0998.2010.02916.x

Éditeur(s) : HAL CCSD Elsevier
Résumé : International audience
ISSN: 0257-8972

hal-01679413
https://hal.archives-ouvertes.fr/hal-01679413
DOI : 10.1016/j.surfcoat.2016.03.021