Pervaporation properties of thermally modified chitosan films
| Autor: | N. N. Matushkina, G. A. Vikhoreva, E. P. Ageev |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Materials science macromolecular substances Surfaces and Interfaces Polymer Chitosan chemistry.chemical_compound Colloid and Surface Chemistry Membrane chemistry Chemical engineering Permeability (electromagnetism) Polymer chemistry medicine Pervaporation Semipermeable membrane Physical and Theoretical Chemistry Swelling medicine.symptom Selectivity |
| Zdroj: | Colloid Journal. 69:272-277 |
| ISSN: | 1608-3067 1061-933X |
| DOI: | 10.1134/s1061933x07030027 |
| Popis: | Pervaporation properties of chitosan films in a basic form prepared from thermally modified chitosan acetate in a salt form with respect to aqueous-organic media are studied. It is found that thermally treated films of smaller surface areas have higher permeability and selectivity than the initial chitosan film. A tenfold increase in the membrane surface area leads to a manyfold decrease in a permeate flux density through a thermally treated membrane as compared with an initial membrane and to the appearance of inverse selective permeability upon variations in a liquid phase composition. The results obtained are compared with the previous data. It is concluded that swelling complex polymeric materials are characterized insufficiently for explanation of specific transport properties with respect to low-molecular-weight substances that are capable of varying the supramolecular organization of a polymer. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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