New approach for description of sorption and swelling phenomena in liquid + polymer membrane systems
| Autor: | Veronika Lindnerová, Alena Randová, Lidmila Bartovská, Ondřej Vopička, Štěpán Hovorka, Tomáš Bartovský, Pavel Izák, Magda Kárászová |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Filtration and Separation 02 engineering and technology 010402 general chemistry 01 natural sciences Analytical Chemistry chemistry.chemical_compound symbols.namesake Polymer chemistry medicine Side chain chemistry.chemical_classification Polydimethylsiloxane Sorption Polymer 021001 nanoscience & nanotechnology 0104 chemical sciences Low-density polyethylene Membrane chemistry Chemical engineering symbols Swelling medicine.symptom van der Waals force 0210 nano-technology |
| Zdroj: | Separation and Purification Technology. 179:475-485 |
| ISSN: | 1383-5866 |
| Popis: | This work reports on new method for description of sorption and swelling phenomena in liquid + polymer systems. An innovative approach to description of polymer-solvent interactions combines swelling and sorption properties of polymeric membranes in liquid media. It stems from gravimetric (material mass change) and dilatometric (material volume change) experiments. Further, we introduced a new parameter, a product of the dilatation interaction factor and the solubility of the organic liquid in the swollen polymer, which can describe the “moving ability” of polymer chains of swollen polymer. The approach was developed on the basis of the data determined for low density semicrystalline polyethylene (LDPE) with benzene and cyclohexane derivates. The obtained results are presented as functions of temperature, number of C-atoms in the side chain of liquid cyclic molecules, and as a function of van der Waals volume of liquid penetrants. The moving ability of polymer chains increases with increasing temperature, but decreases with increasing number of C-atoms in the side chain of penetrants. The new parameter was determined also for rubbery polydimethylsiloxane (PDMS), Lukopren, modified Lukopren with embedded montmorillonite and on polyvinylidene fluoride (PVDF) membrane samples. |
| Databáze: | OpenAIRE |
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