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Article Dans Une Revue Polymer Année : 2024

Optimization of synthesis conditions and calibration of water-swellable polyacrylamide microgels

Résumé

Precipitation Polymerization (PP) and Inverse Emulsion Polymerization (IEP) are the main procedures widely used for the synthesis of microgels from acrylamide derivate monomers, in both academic and industrial spheres. Here, these procedures were optimized for pure acrylamide monomer to synthetize a “model” polyacrylamide microgel targeting a minimized size of approximately 200 nm in radius. For this neutral and non-responsive monomer, the role of the co-solvent in PP and co-surfactant in IEP was discussed. This work demonstrates the crucial step of purification and calibration on microgels physical properties in suspension. In particular, the filtration step has a significant impact on their rheological behaviour, where the flow properties requiring a complex description become analysable with a standard Carreau–Yasuda model. In summary, this paper provides a systematic discussion on the role of each step in the elaboration of model microgel, as a routine checklist to be considered before further physical-chemical studies.

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Polymères
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Dates et versions

hal-04502868 , version 1 (13-03-2024)

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Ashley Mungroo, Jean-Charles Majesté, Fabien Dutertre. Optimization of synthesis conditions and calibration of water-swellable polyacrylamide microgels. Polymer, 2024, 296, pp.126811. ⟨10.1016/j.polymer.2024.126811⟩. ⟨hal-04502868⟩
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