Colloidal dispersion stability : kinetic modeling of agglomeration and aggregation
dc.contributor.author | Gonzatti, Guilherme Kilpp | pt_BR |
dc.contributor.author | Netz, Paulo Augusto | pt_BR |
dc.contributor.author | Fiel, Luana Almeida | pt_BR |
dc.contributor.author | Pohlmann, Adriana Raffin | pt_BR |
dc.date.accessioned | 2015-11-21T02:37:38Z | pt_BR |
dc.date.issued | 2015 | pt_BR |
dc.identifier.issn | 0103-5053 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/130100 | pt_BR |
dc.description.abstract | In this work we present a simple model for the kinetics of agglomeration and aggregation of colloidal particles. We consider that particles agglomerate rapidly and endothermically forming oligomers. These oligomers can, in turn, aggregate irreversibly, in a process that leads to the destabilization of the colloidal system. As these two processes have very different relative energy activations, they occur in different time-scales: the first step is faster and reaches a state of quasi‑equilibrium. Because of this, the enthalpy change during the agglomeration can be experimentally determined through the variable temperature multiple light scattering (VTMLS) method. Interestingly, this value is related to the relative kinetic stability of the system and can be used to evaluate the stability of new colloidal compositions. Our results are in qualitative agreement with experimental data of low concentration colloidal dispersions consisted of polymer particles and/or surfactant-coated particles. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | Journal of the Brazilian Chemical Society. São Paulo. Vol. 26, no. 2 (Feb. 2015), p. 373-380 | pt_BR |
dc.rights | Open Access | en |
dc.subject | Colóides | pt_BR |
dc.subject | Colloidal stability | en |
dc.subject | Kinetic modeling | en |
dc.subject | Cinética | pt_BR |
dc.subject | Indefinite self-association | en |
dc.subject | Secondaryminimum | en |
dc.title | Colloidal dispersion stability : kinetic modeling of agglomeration and aggregation | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 000977475 | pt_BR |
dc.type.origin | Nacional | pt_BR |
Este item está licenciado na Creative Commons License
-
Artigos de Periódicos (39123)Ciências Exatas e da Terra (5955)