Particulate Coatings via Evaporation-Induced Self-Assembly of Polydisperse Colloidal Lignin on Solid Interfaces

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • Institute of Catalysis and Surface Chemistry of the Polish Academy of Sciences
  • Escola Superior d’Enginyeries Industrial

Abstract

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.

Details

Original languageEnglish
Pages (from-to)5759-5771
Number of pages13
JournalLangmuir
Volume34
Issue number20
Publication statusPublished - 22 May 2018
MoE publication typeA1 Journal article-refereed

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