Get access

Charging Behavior and Stability of the Novel Amino Group Containing Cellulose Ester Cellulose-4-[N-methylamino]butyrate Hydrochloride

Authors

  • Cíntia Salomão Pinto Zarth,

    1. Friedrich Schiller University of Jena, Institute for Organic, Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, 07743 Jena, Germany
    Search for more papers by this author
  • Lidija Fras Zemljič,

    Corresponding author
    1. Members of the European Polysaccharide Network of Excellence (EPNOE)
    2. University of Maribor, Faculty of Mechanical Engineering, SI-2000 Maribor, Smetanova Ulica 17, Slovenia
    • Members of the European Polysaccharide Network of Excellence (EPNOE).===

    Search for more papers by this author
  • Duško Čakara,

    1. University of Rijeka, Department of Biotechnology, Braće Mažuranića 10, 51000, Rijeka, Croatia
    Search for more papers by this author
  • Matej Bračič,

    1. University of Maribor, Faculty of Mechanical Engineering, SI-2000 Maribor, Smetanova Ulica 17, Slovenia
    Search for more papers by this author
  • Annett Pfeifer,

    1. Friedrich Schiller University of Jena, Institute for Organic, Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, 07743 Jena, Germany
    Search for more papers by this author
  • Karin Stana-Kleinschek,

    1. Members of the European Polysaccharide Network of Excellence (EPNOE)
    2. University of Maribor, Faculty of Mechanical Engineering, SI-2000 Maribor, Smetanova Ulica 17, Slovenia
    Search for more papers by this author
  • Thomas Heinze

    Corresponding author
    1. Members of the European Polysaccharide Network of Excellence (EPNOE)
    2. Friedrich Schiller University of Jena, Institute for Organic, Chemistry and Macromolecular Chemistry, Center of Excellence for Polysaccharide Research, Humboldtstraße 10, 07743 Jena, Germany
    • Members of the European Polysaccharide Network of Excellence (EPNOE).===

    Search for more papers by this author

Abstract

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.

Ancillary