Nonlinear effects in mass transfer of liquid media through polymeric materials

Autor:	E. P. Ageev, M. A. Golub, N. N. Matushkina
Rok vydání:	2011
Předmět:	chemistry.chemical_classification Chemistry Kinetics Analytical chemistry General Chemistry Polymer Permeation Membrane Chemical engineering Permeability (electromagnetism) Mass transfer medicine Steady state (chemistry) Swelling medicine.symptom
Zdroj:	Russian Journal of General Chemistry. 81:200-208
ISSN:	1608-3350 1070-3632
DOI:	10.1134/s1070363211010373
Popis:	Transport properties of several aromatic polyamides among which there exist fairly subtle structural differences were examined in perva-poration of water-isopropanol solutions. The dependences of the flux density on the membrane area and the oscillatory kinetics of permeability were established, and an unstable steady state arising via predominant permeation of an organic solvent through a highly hydrophilic polymeric membrane was revealed. Conductometric examination of the swelling kinetics showed that chitosan swelling in water gives rise to instabilities in the form of macrofluctuations of local sorbate concentration distribution in the polymer. The wavelet analysis of the time series of the stochastic oscillations was carried out.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5498f4496905a43c44883f7160f2b7fb https://doi.org/10.1134/s1070363211010373 Zobrazit plný text záznamu Plný text ve formátu PDF