Charging behavior and stability of the novel amino group containing cellulose ester cellulose-4-[N-methylamino]butyrate hydrochloride

Cíntia Salomão Pinto Zarth, Lidija Fras Zemljič, Duško Čakara, Matej Bračič, Annett Pfeifer, Karin Stana-Kleinschek, Thomas Heinze

Research output: Contribution to journalArticleResearchpeer-review

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.

Original languageEnglish
Pages (from-to)1669-1676
Number of pages8
JournalMacromolecular chemistry and physics
Volume213
Issue number16
DOIs
Publication statusPublished - 28 Aug 2012
Externally publishedYes

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Keywords

  • amino group-containing cellulose esters
  • cellulose-4-[ N -methylamino]butyrates
  • hydrolytic stabilities
  • polyelectrolyte titrations
  • potentiometric titrations

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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