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Statistical evaluation of the changes in cellulose properties caused by the stepwise solvent exchange and esterification
Abstract
The objective of the research was to empirically confirm the changes in cellulose reactivity caused by the pre-treatment with solvents of different polarity. Therefore, 5 solvents varying in their polar component of surface tension from 0 to 4.6 mN/m were chosen. Their impact on the biopolymer properties was carefully analysed concerning chemical structure, crystallinity and surface characteristics. It was revealed that the length of 6OH⋯O3′ intermolecular H-bonds increased upon each solvent-exchange from (0.2748 ± 0.0001) nm to approx. 0.2760 nm for non-polar solvents, hence, potentially affecting cellulose structure and availability of active centres capable of reaction. As a consequence of structural variations, dioxane- and toluene-exchanged cellulose exhibited, respectively, the lowest (around 0.6 mJ/m2) and the highest (approx. 3.1 mJ/m2) polar component of surface free energy. Therefore, these samples were esterified. Further investigation successfully confirmed expected differences. Toluene-exchanged sample exhibited degree of substitution oscillating around 20%, while dioxane-exchanged specimen – approx. 7%.
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Authors (5)
-
Stefan Cichosz
- Politechnika Łódzka
-
Katarzyna Dems-Rudnicka
- Politechnika Łódzka
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Aleksandra Jastrzębska
- Politechnika Łódzka
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Anna Masek
- Politechnika Łódzka
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Keywords
Details
- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
INDUSTRIAL CROPS AND PRODUCTS
no. 203,
ISSN: 0926-6690 - Language:
- English
- Publication year:
- 2023
- Bibliographic description:
- Cichosz S., Dems-Rudnicka K., Łapiński M., Jastrzębska A., Masek A.: Statistical evaluation of the changes in cellulose properties caused by the stepwise solvent exchange and esterification// INDUSTRIAL CROPS AND PRODUCTS -Vol. 203, (2023), s.117118-
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.indcrop.2023.117118
- Sources of funding:
-
- COST_FREE
- Verified by:
- Gdańsk University of Technology
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