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2014 | 12 | 4 | 509-518
Tytuł artykułu

Interfacial behavior of water bound to nitrocellulose containing residual nitric and sulfuric acids

Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
To prepare nitrocellulose (NC), microcrystalline cellulose was treated in a mixture of nitric and sulfuric acids. Prepared NC containing a small amount of acids was studied at a different hydration degree (h = 10–1000 mg g−1) in different dispersion media (chloroform-d, acetone-d6 or their mixtures) using low-temperature 1H NMR spectroscopy. The hydration degree and the presence of residual acids affected the temperature dependence of the chemical shifts of proton resonance of water bound to NC. The Gibbs free energy of bound water became less negative with increasing hydration rate. The chloroform and acetone media affect the behavior of bound-to-NC water unfrozen at T<273 K differently. Quantum chemical calculations were performed using ab initio (HF/6-31G(d,p)), DFT (B3LYP/6-31G(d,p)) and semiempirical PM7 methods to analyze the interfacial behavior of water interacting with NC containing residual amounts of nitric and sulfuric acids.
Wydawca

Czasopismo
Rocznik
Tom
12
Numer
4
Strony
509-518
Opis fizyczny
Daty
wydano
2014-04-01
online
2014-01-16
Twórcy
  • Warsaw University of Technology
  • Chuiko Institute of Surface Chemistry
  • Institute of Bioorganic Chemistry and Petrochemistry
autor
  • Maria Curie-Skłodowska University
  • Chuiko Institute of Surface Chemistry
Bibliografia
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Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.-psjd-doi-10_2478_s11532-013-0397-y
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