Jean-François Argillier

Publications (2)5.84 Total impact

• Article: Contribution of flow field flow fractionation with on line static and dynamic light scattering to the study of hydrosoluble polyelectrolyte complexes.

  Didier Le Cerf, Sébastien Simon, Jean-François Argillier, Luc Picton
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  ABSTRACT: Water soluble polyelectrolyte complexes (PECs) formed between polyaspartate (anionic polymer) and poly(trimethylammonium propyl methacrylamide chloride) (cationic polymer) were studied by flow field flow fractionation with on-line coupling multi-angle laser light scattering-quasi elastic light scattering-differential refractive index determination (F4/MALLS/QELS/DRI). The separation technique permits to characterize polydisperse PECs. The molar mass of the polycation (PC) influences the stiffness of the PECs and the proportion between single PECs (i.e. nPA/1PC) and multiple PECs (i.e. nPA/n'PC). High ionic strength with NaCl (>0.1 M) tends to break the multiple PECs while CaCl2 destroys PECs and leads to the formation of complexes polyaspartate/Ca2+. The studied PECs can be used as inhibitors to the calcite formation in the drilling fluids.
  Analytica chimica acta 11/2007; 604(1):2-8. · 4.31 Impact Factor
• Article: Hydrogels Based on Pullulan Crosslinked with sodium trimetaphosphate (STMP): Rheological study

  Stéphane Lack, Virginie Dulong, Didier Le Cerf, Luc Picton, Jean François Argillier, Guy Muller
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  ABSTRACT: Hydrogels from pullulan crosslinked with sodium trimetaphosphate (STMP) under alkaline condition have been investigated by rheological measurements. The influence of reagents concentration (pullulan, STMP, NaOH) on kinetics of reaction and rheological properties is reported. Increasing concentrations of any reagents lead to an increase of the crosslinking kinetics. Increasing the polymer concentration leads to a stronger gel whereas an increase of crosslinking reagent (STMP) evidences a critical concentration above which the rheological properties of the gel do not change anymore. This may be explained by the specificity of the system for which the polymer concentration is high and negative charges appear.
  Polymer Bulletin 11/2004; 52(6):429-436. · 1.53 Impact Factor