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Polydisperse smooth and spherical biocolloidal particles were suspended in aqueous media and allowed to consolidate via evaporation-induced self-assembly. The stratification of the particles at the solid-air interface was markedly influenced, but not monotonically, by the drying rate. Cross-sectional imaging via electron microscopy indicated a structured coating morphology that was distinctive from that obtained by using particles with a mono- or bimodal distribution. Segregation patterns were found to derive from the interplay of particle diffusion, interparticle forces, and settling dynamics. Supporting our experimental findings, computer simulations showed an optimal drying rate for achieving maximum segregation. Overall, stratified coatings comprising nano- and microparticles derived from lignin are expected to open opportunities for multifunctional structures that can be designed and predicted on the basis of experimental Péclet numbers and computational order.
FingerprintDive into the research topics of 'Particulate Coatings via Evaporation-Induced Self-Assembly of Polydisperse Colloidal Lignin on Solid Interfaces'. Together they form a unique fingerprint.
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BioELCell: Bioproducts Engineered from Lignocelluloses: from plants and upcycling to next generation materials
Majoinen, J., Rojas Gaona, O., Dufau Mattos, B., Klockars, K., Abidnejad, R., Garcia Greca, L., Bhattarai, M., Ajdary, R., Johansson, L., Zhu, Y., Zhao, B., Ressouche, E., Tardy, B., Robertson, D. & Kämäräinen, T.
30/07/2018 → 31/07/2023
Project: EU: ERC grants