INFLUENCE OF INITIAL STATE OF CHITOSAN MEMBRANES ON THEIR SEPARATION PROPERTIES IN PERVAPORATIVE DEHYDRATION

• Authors: Małgorzata Gnus
• Languages of publication: EN

Abstracts

EN

In this study, membranes from chitosan with different molecular weights (175-230 kDa) and degree of deacetylation (92%-98%) were prepared and dehydration of a ethanol-water azeotropic mixture by pervaporation on membranes in the swollen and dry initial state was investigated. The influence of chitosan characteristics and the effect of the initial membrane state on separation properties are discussed. The structure of the obtained membranes changed during the drying process and affected the membrane transport parameters and time to membrane stabilisation. The impact of chitosan characteristics on the transport parameters depended on the initial membrane state. The chitosan molecular weight influenced ethanol transport, whereas the chitosan degree of deacetylation affected water transport. In addition, chitosan with the lowest molecular weight improved the separation properties of the membranes.

Keywords

EN

Chitosan; ethanol dehydration; membrane initial state; pervaporation; transport parameters

Discipline

• CHEMISTRY: CHEMISTRY

• Publisher: Polish Chitin Society
• Journal: Progress on Chemistry and Application of Chitin and its Derivatives
• Year: 2022
• Volume: 27
• Pages: 92-105

Contributors

author

Małgorzata Gnus

• The Łukasiewicz Research Network – Institute for Engineering of Polymer Materials and Dyes

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• Document Type: article