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See detailDispersion Atom Transfer Radical Polymerization of vinyl monomers in supercritical carbon dioxide
Grignard, Bruno ULiege; Jérôme, Christine ULiege; Calberg, Cédric ULiege et al

in Macromolecules (2008), 41(22), 8575-8563

Controlled dispersion atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was successfully carried out in supercritical carbon dioxide in the presence of aminated fluoropolymers ... [more ▼]

Controlled dispersion atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) was successfully carried out in supercritical carbon dioxide in the presence of aminated fluoropolymers. These materials played the dual role of macroligand for the copper bromide and also steric stabilizer to support formation of polymer microspheres. The livingness of the PMMA beads was confirmed by the one-pot two-step PMMA chain extension and the synthesis of poly(methyl methacrylate)-b-poly(2,2,2-trifluoroethyl methacrylate) (PMMA-b-PFMA) diblock copolymer in scCO2. Successful activator generated by electron transfer (AGET) for ATRP of MMA, using tin ethylhexanoate as a reducing agent, is also discussed, and the concept of dispersion ATRP of MMA was successfully extended to the controlled dispersion polymerization of styrene by ATRP leading to the formation of PS microparticles. Finally, due to the high solubility of the catalyst in scCO2, the purification of PMMA was investigated by supercritical fluid extraction, leading to the preparation of PMMA beads with low residual catalyst traces. [less ▲]

Detailed reference viewed: 82 (8 ULiège)
See detailDispersión de semillas por coleópteros coprófagos
Culot, Laurence ULiege

Scientific conference (2010, March 09)

Detailed reference viewed: 31 (1 ULiège)
See detailDispersión de semillas por primates
Culot, Laurence ULiege

Scientific conference (2010, March 08)

Detailed reference viewed: 28 (0 ULiège)
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See detailDispersion des températures d'homogénéisation des inclusions aqueuses: ébullition ou division par étranglement?
Darimont, Anne ULiege; Coipel, Jacques

in Chemical Geology (1982), 37

Detailed reference viewed: 13 (1 ULiège)
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See detailDispersion nitroxide mediated polymerization of methyl methacrylate in supercritical carbon dioxide using in situ formed stabilizers
Grignard, Bruno ULiege; Phan, Tran; Bertin, Denis et al

in Polymer Chemistry (2010), 1(6), 837-840

PMMA microspheres were successfully prepared in supercritical carbon dioxide by controlled dispersion nitroxide mediated polymerization of methyl methacrylate using perfluorinated stabilizers that were ... [more ▼]

PMMA microspheres were successfully prepared in supercritical carbon dioxide by controlled dispersion nitroxide mediated polymerization of methyl methacrylate using perfluorinated stabilizers that were generated “in situ”. [less ▲]

Detailed reference viewed: 59 (13 ULiège)
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See detailDispersion nitroxide mediated polymerization of MMA in supercritical carbon dioxide
Grignard, Bruno ULiege; Gigmes, Didier; Jérôme, Christine ULiege et al

Poster (2009, May 14)

Controlled dispersion Nitroxide Mediated Polymerization (NMP) of methyl methacrylate (MMA) was successfully carried out for the first time in supercritical carbon dioxide (scCO2) in the presence of CO2 ... [more ▼]

Controlled dispersion Nitroxide Mediated Polymerization (NMP) of methyl methacrylate (MMA) was successfully carried out for the first time in supercritical carbon dioxide (scCO2) in the presence of CO2-philic perfluorinated surfactant that was generated “in situ”. The control of the MMA polymerization relies on the strategy developed by Charleux et al. that consists of using a SG1-based alkoxyamine, i.e. the block-builder, in the presence of small amount of styrene. In a first step, CO2 soluble polyheptadecafluorodecylacrylate was prepared in scCO2 using block-builder as an alkoxyamine. In a second step, nitroxide SG1 mediated dispersion polymerization of MMA was conducted at 70°C and 300 bar in the presence of 5 w% of SG1 terminated surfactant compared to the monomer. Different monomer to alkoxyamine molar ratios were investigated in order to target different molecular weights. In each case, the monomer conversion was high (>90 %), the experimental molecular weight was in good agreement with the theoretical value and the polydispersity was narrow (Mw/Mn ~1.2). Moreover, after depressurisation of the cell, PMMA was collected as a free flowing powder consisting of small sized microspheres. [less ▲]

Detailed reference viewed: 92 (9 ULiège)
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See detailDispersion of multiwalled carbon nanotubes in water by lignin
Rochez, Olivier; Zorzini, Gwendoline; Amadou, Julien et al

in Journal of Materials Science (2013), 48(14), 4962-4964

Multiwalled carbon nanotubes (MWCNT) can be stably dispersed in water with small amount of lignin. One-step dispersion in the 20.0 g/L concentration range is achieved at room temperature with excellent ... [more ▼]

Multiwalled carbon nanotubes (MWCNT) can be stably dispersed in water with small amount of lignin. One-step dispersion in the 20.0 g/L concentration range is achieved at room temperature with excellent electrical properties of MWCNT. Lignin is depicted to act as an anti-static agent. [less ▲]

Detailed reference viewed: 122 (37 ULiège)
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See detailDispersion of Myzus persicae and transmission of Potato virus Y under elevated CO2 atmosphere
Bosquée, Emilie ULiege; Boullis, Antoine ULiege; Bertaux, Morgane et al

in Entomologia Experimentalis et Applicata (2017), Accepted

Most phytoviruses use insect vectors to spread and infect the surrounding crop plants. Because atmospheric gas concentrations alter the physiology and metabolism of plants, we hypothesize that the ... [more ▼]

Most phytoviruses use insect vectors to spread and infect the surrounding crop plants. Because atmospheric gas concentrations alter the physiology and metabolism of plants, we hypothesize that the concentration of carbon dioxide affects the spread of viruses, due to modifications in the feeding behavior of the vector. Tobacco plants, Nicotiana tabacum L., and green peach aphids Myzus persicae (Sulzer) (Hemiptera: Aphididae) were cultivated and raised, respectively, both under ambient (450ppm, termed aCO2) and elevated (800ppm, termed eCO2) concentrations of carbon dioxide (CO2). For each atmospheric condition, we first evaluated the ability of the Potato Virus Y to spread in a small experimental design, from a central infected tobacco plant to two surrounding circles of healthy plants in presence of aphid vectors for seven days. The number of aphids recovered on each plant and the infection status (i.e. healthy vs infected) of the plants were assessed at the end of the experiment. We also evaluated the ability of aphids to transmit the virus under the two experimental atmospheres, by immediately transferring a single insect from an infected plant to a healthy one. The presence of virus in healthy plants was then determined. We found that aphid dispersal, as well as the associated spread of viruses, did not differ between the two atmospheres. On the other hand, we found that aphids grown under eCO2 were more efficient in transmitting viruses to healthy plants compared to aphids reared under aCO2 conditions. The results of this experiment indicate that: (1) the ability of an aphid vector to spread a phytovirus is not affected by the level of CO2 at short time and spatial scales, but (2) the concentration of CO2 may affect plant defences or the feeding behaviour of herbivorous insects, resulting in more efficient viral transmission from the vector to the host plant. [less ▲]

Detailed reference viewed: 36 (5 ULiège)
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See detailDispersion of Myzus persicae and transmission of Potato Virus Y under elevated CO2 atmosphere
Bosquée, Emilie ULiege; Boullis, Antoine ULiege; Bertaux, Morgane et al

Poster (2017, July)

Detailed reference viewed: 14 (2 ULiège)
See detailDispersion of the liquid trickle flow thhrough packed-beds
Crine, Michel ULiege; Asua, José Maria; Marchot, Pierre ULiege et al

Conference (1981)

Detailed reference viewed: 9 (0 ULiège)
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See detailDispersion relations for meson-proton and proton-proton forward elastic scattering
Alkin, A.; Cudell, Jean-René ULiege; Martynov, E.

in Cudell, Jean-René; Lansberg, Jean-Philippe; Mancusi, Davide (Eds.) 30 Years of Strong Interactions: a Three-Day Meeting in Honour of Joseph Cugnon and Hans-Jürgen Pirner (2012)

An analysis of the data on forward $pp, \bar pp, \pi^{\pm}p$ and $K^{\pm}p$ scattering is performed making use of the single- and double-subtraction integral and comparing with derivative dispersion ... [more ▼]

An analysis of the data on forward $pp, \bar pp, \pi^{\pm}p$ and $K^{\pm}p$ scattering is performed making use of the single- and double-subtraction integral and comparing with derivative dispersion relations for amplitudes. Various pomeron and odderon models for the total cross sections are considered and compared. The real part of the amplitude is calculated via dispersion relations. It is shown that the integral dispersion relations lead to a better description of the data for $\sqrt{s}>$5 GeV. Predictions of the considered models for the TOTEM experiment at LHC energies are given [less ▲]

Detailed reference viewed: 17 (1 ULiège)
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See detailDisplaced by Fukushima: as a case of Environmental and Forced Migration
Hasegawa, Reiko ULiege

Scientific conference (2016, November 03)

Detailed reference viewed: 27 (1 ULiège)
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See detailDisplacement amplification mechanism in a capacitive accelerometer
Zeimpekis, Ioannis; Kraft, Michaël ULiege

in MME 2008: Technical digest (2008, September)

Detailed reference viewed: 8 (0 ULiège)
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See detailDisplacement and equilibrium models in the finite element method
Fraeijs de Veubeke, Baudouin ULiege

in Zienkiewicz, O. C.; Holister, G. S. (Eds.) Stress Analysis (1965)

A capital contribution to the finite element method, including for the first time equilibrium models, dual analysis, the quadratic displacement element, a discussion of mixed formilation, and the ... [more ▼]

A capital contribution to the finite element method, including for the first time equilibrium models, dual analysis, the quadratic displacement element, a discussion of mixed formilation, and the limitation principle. [less ▲]

Detailed reference viewed: 1691 (8 ULiège)
See detailDisplacement as a consequence of climate change mitigation policies
Vigil Diaz Telenti, Sara ULiege

Conference given outside the academic context (2015)

Detailed reference viewed: 33 (0 ULiège)
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See detailDisplacement as a consequence of climate change mitigation policies
Vigil Diaz Telenti, Sara ULiege

in Forced Migration Review (2015), 49

Detailed reference viewed: 40 (1 ULiège)