Hydrogels Based on Pullulan Crosslinked with sodium trimetaphosphate (STMP): Rheological study

Stéphane Lack (1) , Virginie Dulong (1) , Didier Le Cerf (1) , Luc Picton (1) , Jean François Argillier (2) , Guy Muller (1)

1 PBM - Polymères, biopolymères, membranes
2 Institut Français du Pétrole

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.

Mots clés: pullulan; STMP; polysaccharides; hydrogels; crosslinking

Domaines: Polymères; Chimie

Stéphane Lack, Virginie Dulong, Didier Le Cerf, Luc Picton, Jean François Argillier, et al.. Hydrogels Based on Pullulan Crosslinked with sodium trimetaphosphate (STMP): Rheological study. Polymer Bulletin, 2004, 52 (6), pp.429 - 436. ⟨10.1007/s00289-004-0299-4⟩. ⟨hal-01866881⟩