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Microgel containers for self-healing polymeric materials: Morphology prediction and mechanism of formation

: Latnikova, A.; Grigoriev, D.; Möhwald, H.; Shchukin, D.


Polymer 73 (2015), S.183-194
ISSN: 0032-3861
Bundesministerium für Wirtschaft und Technologie BMWi
Fraunhofer IAP ()

18 types of gel microparticles, composed of 3 polymer types and 6 different solvents, were prepared by interfacial polymerization and compared in a systematic way with respect to their structure and function. Three types of morphologies, specific for each polymer-solvent pair, were observed: core-shell, multicompartment and compact. The morphology was found to be a direct consequence of the specific polymer-solvent interactions and can be, in most cases, predicted on the basis of simple swelling experiments with a chosen polymer in the solvent. Further, the Hansen Solubility Parameters approach was applied to the investigated systems enabling a reliable morphology prediction of microgel particles made of any polymer/solvent combination with known solubility parameters (spheres). The mechanisms responsible for the formation of particles with different morphologies are also discussed.