Statistical evaluation of the changes in cellulose properties caused by the stepwise solvent exchange and esterification - Publikacja - MOST Wiedzy

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Statistical evaluation of the changes in cellulose properties caused by the stepwise solvent exchange and esterification

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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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Kategoria:
Publikacja w czasopiśmie
Typ:
artykuły w czasopismach
Opublikowano w:
INDUSTRIAL CROPS AND PRODUCTS nr 203,
ISSN: 0926-6690
Język:
angielski
Rok wydania:
2023
Opis bibliograficzny:
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:
Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1016/j.indcrop.2023.117118
Źródła finansowania:
  • Publikacja bezkosztowa
Weryfikacja:
Politechnika Gdańska

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