Charging Behavior and Stability of the Novel Amino Group Containing Cellulose Ester Cellulose-4-[N-methylamino]butyrate Hydrochloride
| Autor: | Thomas Heinze, Karin Stana-Kleinschek, Matej Bračič, Lidija Fras Zemljič, Duško Čakara, Annett Pfeifer, Cíntia Salomão Pinto Zarth |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Polymers and Plastics
Hydrochloride Organic Chemistry Potentiometric titration Condensed Matter Physics Aminocellulose Titration Potentiometric Protonation Polysaccharide Polyelectrolyte pK Charging chemistry.chemical_compound Hydrolysis chemistry Polymer chemistry Materials Chemistry Organic chemistry Moiety Ammonium Physical and Theoretical Chemistry Cellulose Nuclear chemistry |
| DOI: | 10.1002/macp.201200057 |
| Popis: | The charging behavior of water-soluble cellulose-4-[ N -methylamino]butyrate hydrochloride (CMABH) with different degree of substitution (DS) is investigated by polyelectrolyte titration at different pH values. Samples of high DS (0.92) and low DS (0.31) exhibit a decrease in positively charged groups from pH 2 (3.9 and 1.9 mmol g − 1 ) to pH 9 (0.81 and 0.65 mmol g − 1 ) due to the deprotonation of the ammonium groups. The stability of the ester linkage of CMABH is examined as a function of pH value and storage time (up to 28 d). A hydrolysis of the ester moiety is evident after 2 h at pH 8, which is also proved by ATR-FTIR- and Raman spectroscopy. |
| Databáze: | OpenAIRE |
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